Your HVAC specs might be COMPLETELY wrong: Manual J Training

and the build shoes today guys we are talking HVAC in order to have a good heating and cooling system in your house long before the installer shows up to install there's some pre-work that needs to happen and if you're a nerd fan of the show you've probably heard me throw out the term manual J before that's what the engineers produce for me the Builder and for my HVAC guy so that we know what's the size of system and what does that system need to provide to the house in order to heat it and cool it so today I've got a buddy of mine who's an expert in manual Jays Corbett Lunsford and Corbett did the manual J for a project that I'm working on this is actually for Luke one of my project managers his personal house you may have seen some of the videos about this house that we're building with ready frame from Builders First Source but Corbett and I are going to run through his manual J we're going to give you a couple pitfalls a couple things that you need to look for and help you to understand what this looks like today build show all about manual JS and understanding them let's get going [Music] all right guys first let me introduce you to my buddy Corbett Corbett how are you today my friend I'm great man how are you man Corbin uh help us to explain your background and and uh others like you you're basically an engineer who takes the plans and the specs and then turns that into this printout this piece of paper which which I call the manual J but help us to understand what that kind of means in uh in more plain language sure actually uh first thing that you should know is I am not an engineer I have a degree in music so um I have been doing this for long enough and practicing with the software for long enough and I like digging into the nerd level details which I hope your audience who's watching this is going to stick around to the end because there's like lots of stuff in here that's very interesting but I uh just all you need to understand is number one home is a system right you're you're an expert in that a lot of your audience understands that very well so Emmanuel J all it really is is figuring out in short language it's figuring out how much heating and cooling your any home needs on the maximum day and maximum isn't really the hottest day it's ever gonna experience it's the 99 and that 99 is really important because if there's 8 760 hours in a year and if you make us your HVAC system size so that it can handle the hottest day that you've got then it's oversized 8759 hours out of the year except for that one hour so we don't really want to do that even if we've got two stage you know equipment or variable speed equipment that's just not a good idea so what you want to do is try and figure out what the maximum Heating and Cooling needed at the 99 day is and then also understand that the manual J is really only about one moment all we're aiming for in in heating Seasons quite easy because the sun doesn't really help us much or hurt us much in the winter time it's heat is bleeding out of the house but in the summertime uh in North America in cooling season you've got the sun beaming in through the west facing windows at about five o'clock in the afternoon it's about as hot as it's going to get outside and everybody's coming home and starting to make dinner so that's kind of like that's your design hour that you're designing for is five o'clock in the afternoon on the hottest day of the year in the summer and so when when you talk about things like oh but what if I had a bunch of people over well you always want to remember it's it's at that one hour so that kind of doesn't make sense so anyway that's all you need to understand for the basics and then we can get into the details soon that's really helpful Corbett so um so let me let's back up a second before we got to this report I needed to give you as the Builder some information to make this report accurate can you kind of check checklist off what are the things that I need to give you and or for you to input the data correctly to this software program that's going to Output the sizing sure anybody who's going to do a manual J properly is going to need the floor plans with measurements and and really all you're concerned about is the enclosure that's another thing to understand about manual J is it doesn't really care about what's going on inside the house partition floors partition walls it's all about the skin the outer skin and so somebody like me needs to know all the r values of your walls your floors your ceilings the slab the bonus room floor all that stuff and then also things like the U value of the windows the shcc value of the windows and also the air tightness and this is where people who are watching your channel are are way ahead of the game because they might know what how tight of a building they build a lot of Builders are having a guess on this and I I'm about to do a video I've got a list of like 30 videos that I'm looking at over my my camera here um of what I need to address on our YouTube channel which is called home performance but one of them is how do you kind of plan for how airtight the home is going to be if you don't know if it's not built yet so that's we can talk about that another time but that you know what kind of home you build so we aimed this for two air changes per hour for this house right yep that's right we we knew we were going to be good um but not the best ever really is is kind of where I went with so we said two ACH 50 code for our um for Austin Texas is five uh we typically shoot for three or under and with the air ceiling details with the way that we're doing a conditionatic we figured two ach50 was was probably the right um landing spot and let me give you just a quick background uh for those of you watching here this is a house that you've seen in framing already this house is about uh 4 000 square feet of framed footage that includes the garage space uh it's a two-story house as you look at it from the front it's one story on that kind of right hand side the left hand side is two-story and is kind of the bigger volume we've got living space above the garage and we're going to be using spray foam in between that cavity to to help mitigate the both airflow and the heat between the garage and that floor above and this is a family home with basically a husband a wife and and two girls living there so that's kind of the quick background just so you can kind of get a gauge for what the house looks like we're using uh Marvin essential line Windows double pane really a good window but not you know triple pane European nothing crazy like that we've got standard two by six construction we do have some zip R3 on the outside and we're going to be insulating the roof line with about 10 inches of open cell spray foam to create a conditioned attic so this is the plans that you sent me the floor plans you obviously also need the elevation and um and then the all the details and kind of the wall cross section and things like that and then of course anybody who's doing this right is probably going to come back to you with questions like for example how big is the roof overhang and you know things like that so so there's always one or two little things outstanding and they should ask and then you get a report now here is what the report is going to look like most of your clients are going to get a report that is two pages if they're lucky it's three pages you can see over here we've got uh two pages of data and then some like pie charts so let me give you a quick tour through this and I just want to show you what you are probably going to see so it's going to have the name of the client the address who did this report and that's important because you're going to want that person's phone number the reference City you want to check to make sure that that's right you've got all your uh where the home is located because that's very very important for this a lot of this you know calculation is based on the home where it happens to sit if it's on the top of a mountain versus in the valley where in the country Etc you've got something called check figures which I'm going to come back to in a minute you got your building loads you can see this is all very very brief you have notes that says this software that I'm handing you this report from is approved by akka for manual j s and D um calculations are approved blah blah blah blah that stuff is all very important and then you're going to get a very simplified load preview report and what you want to see here in the first glance is room by room because there's two kinds of manual J calculations there's block load which is just the skin that I was mentioning before that this software really cares about and then there's the room by room and really what you want is not just the skin the skin is if you're doing a change out on an existing home then doing the block load is kind of useful for just knowing how big the air conditioner should be that you're replacing the older one with but if you're trying to make sure that you divvy up the BTUs correctly where they belong within the house you need this room by room calculation you're just saying oh we're just going to give there's five rooms we'll give one-fifth of the the BTUs to each room doesn't make any sense because windows are now a big part of this conversation and in fact in this house they're a particular big deal so let's go back up to oh and by the way the um the pie chart down here now these pie charts are important and these should this should alarm you if you're looking at this um we've got the floor sucking a lot of heat out in the winter time and we've got the ductwork losing a ton um in the summertime we've got the ductwork losing a ton as well and then the glass obviously is the big one in the summertime so that ductwork is part of why what's that something's wrong here those Ducks shouldn't be uh 40 loss this is a non-conditioned attic I'm guessing was uh was how you ran this did I did I guess correctly you are corrected this report is total BS this report that I'm showing you here is wrong um what this is saying is that you need 6.72 tons that's seven tons for a 3 000 square foot house you're getting about a 500 square foot per ton which is a metric that you know a lot you you've referenced that before in your Channel and that's that is rule of thumb sizing so here's a couple things that I just want to point out about this report that makes it hack now if you have a two-page report my point here in opening this way is to like point out that like how are you supposed to know if this is right or wrong if there's only this much information well here's a few things that you can look at so first thing is this right here this winter and summer temperature this is the 99 temperature and you want to make sure that nobody has messed with those numbers these numbers if if I was to open up my manual J software as just a guy who you call for a second opinion and I pull up Austin Airport in Texas it should tell me exactly the same numbers as your guy used for the report that's sitting in front of you gotcha and so you could that's an easy way to double check this but also over here this person asked the homeowner or the Builder what temperature they set their thermostat to in the winter and the summer and that is a very wrong question it's it's a trick that they use to slightly upsize and the Reason by the way I love HVAC guys the reason the HVAC professionals are going to try and upsize this is because they very rarely work with Builders like you who actually build the enclosure the way they say they're going to so I built my own house and I know exactly you know I planned it and then I did exactly what I wanted to do most of the time you're dealing with a builder who doesn't they might say they care but maybe they don't care when it's like is it time to give somebody a hard time or not and then things happen and mistakes are made and it's not a two air changes per hour and uh you didn't use zippar you used regular zip etc etc so then they're upsizing really helps because then they get the heat if anything goes wrong with the HVAC which might be the Builder's fault yeah not the hvac's fault right that's right so this should be 70 degrees in the winter and 75 in the summer always that's the way that manual J runs so if you see that that's a dead giveaway that they mess some stuff up by asking what temperature do you like your thermostat set to um also right here if you take this volume which is about thirty thousand uh cubic feet of air and you divide it by your square footage now the square footage of this house as you see it when you're building this house it does that track about 3 000 square feet yeah that's right uh okay I mentioned it was four thousand square feet because I want people to remember that as Builders we shouldn't be talking HVAC footage because I'm not building a 3062 square foot house here multiplied by whatever your cost per foot is I'm really building a 4 000 square foot house we've got a 2.5 car garage we got a big back porch we got a big front porch all told this is a 4 000 square foot housework building uh and actually I'm going to show you that it's actually a 5 000 square foot house that you're building there we go in a minute according to how manual J sees it but this if you see the actual square footage um and the important thing here is the conditioned attic if you have a conditioned attic that you're building into your home and you see the square footage that you are going to tell the tax assessor how many square feet this house is that can't possibly be right so if I divide my volume by my square footage here I get a number between nine and ten I've got 10 foot ceilings on the first floor nine for ceilings on the second floor that can't possibly be right because it does not include the Attic by definition so even in a two-page report you can take a look at that and do that quick math and say they didn't include yet sums around yep yeah square footage per ton on a home that is like one that that that your viewers are seeing on your channel that's going to be between 1200 and 2500 uh square feet per ton anything less than that is suspicious if you're looking at like a blower door less than three air changes per hour well insulated walls ceilings floors Etc there's no way that it can be that that high yeah and I can and I'll show you exactly how this works here's the big block numbers that you're looking for here's your heating load 75 your cooling load 70. so it's about the same on both and 6.7 tons which really is going to round up to seven this is all nominal nobody makes a seven ton air conditioner right nobody does anyway but nobody makes like a five ton even if they're all slightly different so here's the thing on the preview report that's really important you look at the ventilation and you can see that the ventilation load is huge that probably means that they're not using something like an Erv or or they've overestimated how much air they're supposed to be bringing in here or they're setting exhaust fans up to run 24 hours a day so that's something that we want to look at the duct loads you can see we've got lots and lots of heat bleed through our ducks ducks are all inside condition space those numbers should be zero that's a ton of cooling just right there isn't there 18 000 exactly yeah just for the Ducks being in unconditioned space that's that's a really uh awesome figure though if I could pause just for one second there I mean that this is why in Texas in the South anybody that's slab on grade where we've got ducks in the attic for years I've been preaching about uh we want to bring our ducks into the conditioned space and it's awesome to see you know I know it intuitively but I don't typically have a number and now I've got in my mind Luke's house under construction and how much attic space is going to be up there that if we were to build it conventionally with insulation on the flat at the ceiling line we would have to upsize his air conditioning by one and a half tons almost a whole two ton unit just for the issue of all that additional uh gain from the ductwork being up in the attic right so now let's be real let's go to what a real manual J report should look like this is 40 pages and all I have to do when I'm building your manual J is you tell me please give me all the reports just check all the boxes when it's like what do you want to print give me everything everything because they'll give you stuff that's not really that useful that's okay so uh it'll you should have a nice shiny logo that says I am proud of this right I I did this and I'm proud of it uh here are the same numbers that we had before that 70 75 yep in set points on the thermostat in the winter in the summer square footage of room areas 5300 when you include all the attic spaces and by the way what's interesting here is that manual J does an eight foot ceiling so if you have 10 foot ceilings it's actually counting that as square footage up to eight feet and then the square footage again on top of that right so that's kind of like it's a little tricky when you look at that square foot you might say oh that that looks really big but but again you want to kind of look at what the the uh 3D model looks like and somebody like me has to build this because I can't think properly I used to do this without it but um this is what the house looked like when it was just 10 foot ceilings on the first floor at nine foot ceilings in the second floor wow look at you a little schedule yeah oh no thanks so uh I mean this is something that I can't really work without because I need to get in here I need to figure out what volume this is I need to figure out how many square feet of wall and floor and ceiling Etc you just can't really work this software without it what Luke's house really looks like is this as according to the manual J now for those of you who are designing houses that are pretty like Matt's company is this takes a little more time like you can see this little that little extra bit right there you'd see this little Dormer right there and this all like just building the model took me two hours really wow yes so so we need to talk about pricing on this because you can't expect anybody to do a good job with this and not really spend time on it and that costs money of course um so now we know the volume of each of these Big Blocks and we can add that up so I can double check myself now so we've got a volume of 40 000 cubic feet square footage is 5300 we're down to 3.9 tons so four tons down from seven with it being wrong and then again the wrong might still work and that's the thing about all this system thinking stuff is it like maybe nothing's gonna happen but of course what you specialize in is helping people predict and prevent problems from coming up that's why you design Solutions in and build them in and test to make sure that they actually work that's right so in the big report here's the first thing that you're going to see that's useful after you see your square footage and your your CFM per ton which by the way again is 13.65. square foot per ton 13.65 there you go yeah that's more like it that's a Matt Risinger uh quality house so in system one we have the infiltration this is you want to find this in this report because if they just set it to be a default which is like average or semi-type or leaky nobody knows really what those means I'm gonna do a video about that too trying to like suss out exactly what numbers those are but I put in you can see here in the blue box the test air changes per hour which was what I selected as the designer is two air changes per hour now that number only works if I've got the volume right so you want to double check that volume again but um knowing that this is all put in here correctly is a big deal can I pause you for one sick uh because because the software is giving you a a square footage in the house which is different than what I'm thinking of as the Builder even though I'm always saying to people hey framed versus conditioned foot is different but if I do the math in my head I want to say the conditioned footage on this house is like 3 200 square feet something like that so if so knowing that I need to get an air conditioner that's not 3.91 tons it's going to be a four ton because that's going to be the closest to what it what it is we're actually somewhere around eight maybe 900 square feet per ton which still makes sense I'm usually thinking most of the time A well-built house should be a minimum a thousand square feet to the ton so we're right in there well yeah and that's where you're kind of cheating yourself if you divide by the square footage that's this that's the CFA that you're putting on your plans because uh you know somebody like me is counting in the attics which are conditioned as part of your square footage so yeah it'll look worse if you just divide by the 3000 or 3300 or whatever you've got in there yep um because it's it's just not really how the house is going to work yeah so you've set up your enclosure it's always better by the way for your audience which I hope they understand by now watching enough of your builds that in closing the attic especially if you've got HVAC stuff up there it's so useful that's a ton extra just for the Ducks being located up there is pretty typical yeah that's right great so the load preview report is where you're gonna this is the thing that was in the two-page report and you can see here where you've got your zones broken out you can see the ventilation is a lot more reasonable now it seems like it makes more sense there's no duct loads in here anymore and you can kind of look at each room and see how much uh sensible gain how much latent gain that's humidity so this is summertime uh heat and humidity added and then winter time heat lost over here and you can see if any particular room sticks out we've got the kitchen is the biggest suck on the house that's almost 7 000 BTUs per hour so we want to kind of like let's look at that when we get down there but um the next report that you're gonna see is the duck size preview now when you send this in for permit this is important for people to understand uh in a lot of States across the country manual J manual s which is equipment selection and manual D which is duct design are all required by law before you get your permit whether or not your local municipality enforces that is kind of beside the point that's another discussion uh but they're not really going to be able to select the equipment unless you're willing to say yep I've got a guy who's I know is going to install this and I know this is kind of brand he's going to install so doing all that stuff before any change orders happen on the house you couldn't get web trusses now we have to use ijoice duck design just changed if the duck design changes are we going to change the equipment selection while we're at it so so all that stuff might want to wait until you're actually under construction and framing but for right now you need to put in something and so if you give your building department a 40 page report on HVAC design they're going to look at this and say yeah this looks right I've got two six inch dots running to the entryway I've got one five inch duct running to the office Etc et cetera so this is kind of like your duct preview if you were just going to take this and run with it now that being said this is not a manual d uh what I'm showing you right here okay so AED this is something that's important for people to understand this is called adequate exposure diversity it basically has to do with where the windows are in the house if you've got Windows uh placed strategically and consistently around the entire building then you'll have an AED that's that's adequate uh this house happens to have a lot of Glass on size of the house that are more vulnerable to this particularly on the west side in the Southwest because of the facing and and this is where like I'm not going to argue with it because yes we're it's warning us that certain parts of the house are going to react differently at certain times of the day particularly at five o'clock P.M you can see this bike right here but it's only 1600 BTUs per hour that's about a tenth of a ton so it's not that bad if you if you were going a ton above that means you have to install a ton extra air conditioning just because you put the windows where you did so that's something you want to look out for but uh in this case not a huge deal there's a thing that we can look at where we're rotating the building so it turns out that the way that the front door is facing right now which is Northeast it's here is the third highest uh sizing that we could have on the house if we were to face the the front door south directly south that would be the best for keeping the HVAC sizing minimal wow interesting so you can kind of look at this and this is important for a builder like you to look at because if you're going to build this house again and again which I don't think you do but somebody like Scott true in one of your pre you know prior videos he builds the same plan a lot and knowing which way is the best way to situate that house and then easily you could you could have the same house plan get one manual J get this and then you've got the sizing for all of your plans no matter which way you turn the house you know what sizing is required and it's a half ton too that's a big deal I mean that's correct that's uh or actually a little more than a half ton because you're gonna have to probably size up on that highest one above four tons so it's uh it's significant money involved potentially yeah and and then also but there's airflow which is another topic um you can see what the room by room gain or excuse me this is the house facing all the different directions the one that we've we actually are building is this red line with the uh purple triangles and you can see how it Stacks up against all the other ones you can see all of them basically climb and they Peak at this five o'clock hour which is again that's the hour that we're designing for in the software that's the hottest part of the day yep so this is the thing that I almost never see inside of a manual J report that's submitted by an HVAC installer you want to see what assumptions they made so now I can go through here just as a builder this stuff is not rocket science and I could look and see if their u-value and shcc for their Windows is what I told them that it was or if they picked a library item that oops was the next one down on the list accidentally and mistakes get made like this is hard so we've got all of your walls in here we've got your floor slab on grade no insulation and we'll see what difference that makes in a minute we've got the partition floor over the garage we've got the roof now here you can look at the people this is a four bedroom home you got five people that's pretty standard bedrooms plus one equipment should be minimal it should be around this 1600 is is basically your kitchen equipment so that's refrigerator cooktop vented uh exhaust Hood gotcha that's standard you don't want to see that really big lighting should be zero and and this is where I went the first time I built one of these uh models I went totally awry so I put in all the lights because the guy said I have LEDs everywhere I'm gonna blah blah blah I've got them in the closet et cetera and I was like okay great I'm gonna put all that in because I want to make sure that we cover you but I forgot that this software is only designing for five o'clock in the afternoon on the hottest day of the year which is in the summertime when the sun is shining so you're not gonna have the lights on at that time I mean you might have some of them on but it's really not going to make that big difference so zero is the right answer there ductwork zero infiltration again we specified the blower door test ventilation we've got this specified and these numbers are what the ashrae 62.2 minus your infiltration The Accidental air linkage through the gaps and cracks that are left over in that two air changes per hour that's what that 43 is then accounting for and uh and just to pause you there for a second we told you Corbett to assume that we were going to use a ventilating dehumidifier to bring in uh air through the dehumidifier and into the return side of the unit so not quite as uh good as what an Erv would be in terms of uh lowering the load on the house but certainly better than an exhaust only type strategy right and unfortunately this software as far as I understand can does not have the ability to build that ventilating dehumidifier and so what we did is I just put in it's going to be a little bit better than this as far as the latent goes because it's obviously going to drop the humidity as it comes in yep but that 43 is the right answer so every every minute you need 43 CFM that means that if you're going to run it at 86 CFM you only run 30 minutes on the hour yeah um to open that other damper on the yeah it makes sense um so total building loads you can see all that stuff right here bam and then your check figures are the same now here's your here's the thing your slab floor this is really interesting to me in Austin you've got 41 of the heat loss through this enclosure lost through that slab it's mostly the slab Edge but also that the very beginning of the edge there yep yeah and it's it's one of the reasons why I ended up doing a uh insulated slab top installation of my house was I've seen that pie chart enough times to realize that in the winter time you lose a lot of heat through your uninsulated slab on grade almost half your load is from the floor just shy of half your load what's what's interesting here though is check this out so we got 45 000 being lost we've got 38 000 being gained yep normally um heat pumps are set up to heat a little bit more than they cool and you're actually getting a benefit from the uninsulated slab in the summertime that's right so this generally if you're not building the kind of house that Matt built for his own family and that I built for my own family that's an extreme you know story we're trying to tell then insulating under this lab is the last thing that you do because decoupling from the Earth uh helps you in the wintertime but it hurts you in the summertime yep and so it's like not the end of the world here there's actually kind of a good thing Corbett one point I want to make here though is that for years and years really decades 99 of the homes in America either had no manual J or had a manual J kind of baked into the HVAC contractors design build bid and usually that meant that the HVAC contractor was having uh the dealer do the manual J uh you know where they're buying their equipment and what I've been trying to tell my friends my family my audience over the years is you should pay for a manual J separately with somebody like Corbett or you've seen me uh have the positive energy guys in Austin on the podcast before or um you know there's a bunch of people that that will do this for you as you know smaller companies even one-man shows like Corbett but you should absolutely do that so that you know that they're taking the time to actually get the specs and the plans and now that we've gone through this and I I've seen manual Jays a bunch I I honestly forgot even though I've seen this it's been a while how much time and effort Corbett put into this manual J to make it accurate and you look at the data that he's using on his Elite uh software here uh I think there's two different software companies writes off an elite that produce this there's a lot of inputs here and you heard him say it took two hours just to do that SketchUp model to to truly understand that this is this is easily a day or twos with a work for Corbett and then time like this afterwards for us to review it together is excellent as well he didn't just send me the report and say here you go we're taking the time to look at it together and he's given you some really good tips that of things to look for to make sure that the report looks good but this is vital this is really important and with that being said Corbett what what I know there's a huge range and I hate to pin you down but what should people expect to pay for a manual Jay in a house most homes that I work on are between a thousand and two thousand for what I'm doing and yeah it's like basically an entire day in front of a computer so a couple things to think of are like number one no matter who you have do this and again I am not an engineer I QC manual J's from other people including professional licensed Engineers um especially ones that work on Commercial projects and that is very dangerous you should be very cautious about that I recently had a client who has like a 12 000 square foot house that they're building in New York 40 tons oh my of air conditioning wow from a professional their plans looked amazing so intimidating but I could go in and find the few pieces of information that I want to know and be like 40 tons or 12 000 square feet doesn't make any sense at all like that's it's not even in the on this planet um so what you can uh do is just make sure that you you or somebody that you trust looks over this stuff and and before I send it out I try to look over it if I had an employee I would have my employee look over it if you want to have another consultant uh look over the the manual J that you got from somebody else that's very easy to do so that's kind of like what you know all of us are trying to educate people through YouTube on how to do this stuff better and I think that it's pretty easy to find people now who can just give you a second opinion on any of this stuff Corbett before we uh before we roll off on this topic what would you put in this house knowing there were 3.91 tons and talk to me about what other equipment I might or might not want uh in a house when it comes to HVAC for the South based on your report well the first thing that I would say is I ran the model with an insulated slab if you put r10 along the slab Edge and under the slab you would lose a ton uh off and not a ton but 12 000 BTUs off of the heating off the heat load that's pretty amazing so that that's not necessary right now but uh that's something to just think about um the short answer is that what needs to happen next is the equipment selection which is the manual s and that actually for somebody like me and this is a question I get a lot how can I get you third party whoever in some other state that I trust to do my manual j s d and if short answer is don't ask me to do your duck design for you because if I build this stuff design and I select the equipment and I like you know I have Mitsubishi in my house so I'm like oh yeah that's that's the one that I think is cool because I like I have in my house then you could get a guy who is a train dealer or a Carrier dealer and he likes to install that stuff he's never he would have to read the whole manual to really do the Mitsubishi right he doesn't want to do that so he's going to upcharge it for that um what's better is to get your HVAC contractor that is somebody that you trust that you've worked with before and you know that it is uh both willing to be open to new things like a very low load you know we're looking at you know at 12 000 square foot house that has four tons of cooling instead of 40. and that can make HVAC guys nervous but if they're willing to do it then that's great then they say here's the product line that I like to install and here's the particular you know performance uh line or the the budget line from that yeah and then I can put that number into the manual s and see if it says yes or no so that's a yes no calculation on the manual last and then for the duck design if they do the duck design because they know what kind of materials they like to work with duckboard and Southeast Flex stacked all over the place hard pipe if you want to build more permanently that's what I did in my own system because I wanted it done like for a hundred year system then I don't have to say I want you to install a hard pipe and they're like I don't do that I don't have the tools for it no and then they just throw the calculation in the garbage and it's worthless so you you have them do the duck design give you the map and then somebody like me can do the calculation to figure out what diameter the Ducks need to be to deliver the stuff that you need to the right places so so that's kind of the best collaboration between the HVAC installers who are critical to this conversation and the designers who potentially are somebody like me some super nerd who works by himself in some other state that you've never heard of so you don't want the hvc guy to hate your designer you want them to be working together that's really important ah so good Corbett really appreciate this super super thoughtful man I think uh people watching this have certainly learned something about manual Jays and I suspect we'll apply this knowledge uh to their next build uh whether that's one that's currently under construction or the very next one they're about to break around on Corbett how can people learn more from you in the future how do people find you sure uh we'd love it so we have a YouTube channel called home performance we also have a television show that uh you are on season two of that's airing around the country right now you can stream PBS it's on PBS that's right it's called home diagnosis so if you go to home diagnosis dot TV you could you could binge watch uh season two that's got Matt in several of the episodes and then also um I have a whole bunch of courses that are rolling out online I've been teaching in person but getting people to fly across the country especially with pandemic is ridiculous so we we even have an HVAC design course where I dive into nerd level 16 on this topic um we also have one day blower door and duct tightness testing certification courses and stuff like that but I try to do as much of this stuff myself because we don't have employees and I like to have a personal relationship with all the people I didn't know there was a nerd level 16. that's impressive that's higher than I've ever gone we're yeah we're trying to we got to push the envelope I've topped out of ten Corbett so you beat me for sure guys I'll put a link uh to all of Corbett's places where you can find him in the description below but thanks for hanging for us uh on this longer build show a little abnormal uh almost podcast style I thought about doing this podcast style uh with Corbett but I felt like uh him reviewing and showing and he did such a great job of kind of highlighting I thought that was really necessary and I wanted this to be an episode where it's almost as if you sat down with the two of us and looked at this report together and I think I think it's particularly cool too that we're making additional videos uh on Luke's house so that you can see this house go in stay tuned for the future video as we get to the HVAC system we're going to be uh making some videos on that as well but huge thanks Corbett really appreciate you uh taking the time for us guys if you're not currently a subscriber hit that subscribe button below you know we've got new content here every Tuesday and every Friday follow us on Instagram or Tick Tock otherwise we'll see you next time build show [Music]

Channel: Matt Risinger

Views: 64,820

Keywords: Matt Risinger, Build Show Network, The Build Show, Build, manual j, hvac

Id: CL-_VjlYnD0

Length: 38min 24sec (2304 seconds)

Published: Tue Sep 20 2022