Passive House - Fresh Air System Install & Costs (Zehnder)

build tight ventilate right we're back in my house under construction and i've got a really fun episode for you we're talking ventilation today you know whether you're building to the standard i'm doing here which is a really airtight enclosure in fact i'm building to passive house standards which is a super tight envelope or you're just building to modern codes you've got a tight house and you need to think about your ventilation strategy the build show today i'm going to show you the world's best ventilator the system that i am super excited to install at my house today's build show is sponsored by zender let's get going [Music] all right guys it's been a minute since we've been over here this is my house under construction we've been calling this the real rebuild and if you haven't caught my other videos this is basically a 1970s slab that i originally was going to remodel and ended up building a new house on top of this old slab so we're in the mechanical phase so i took a couple months off just to get a couple things aligned but we're back at it and we're having a lot of fun so mechanicals are going in that's hvac when we think about hvac we typically are just thinking the heating and cooling for the house but the v is critical that's your ventilation and most builders most houses under construction the v the ventilation is just an afterthought that's your dryer exhaust that's your exhaust fans out of bathrooms maybe there's a fresh air input to the furnace or through the dehumidifier but on the build show today i'm going to show you a system that's like no other it's a really good system and let's talk about why we need that when we build a really tight envelope like i have here we're not having air infiltrate in when it blow when the wind blows or when an exhaust fan turns on let's say the house is going to be really really airtight so as a result we need a fresh air input and i would say whether you're building a house to this crazy tight standard or you're building a more modern house to let's say just code built standards you probably need a fresh air system and you probably need a really good one because we don't want to rely on fresh air just when the wind is blowing right or when your furnace kicks on we want that fresh air all the time now i want to use our bodies as an example or a prototype for a house when god designed our bodies we've only got one spot for air to come in right through our nose or our mouth into our lungs and our lungs are using their muscles constantly 24 7 just to breathe a little bit in and out out of this one spot we don't poke a hole in our body to get to our lungs we don't want air leaking into other spaces it only should come in through our mouth and our lungs now man has been doing this for years right we make submarines we make spaceships we know how to do breathing in enclosed airtight enclosures but we haven't been paying that much attention to our houses and what we're doing here is a system that's very similar to the body where in this house i'm going to show you we only have one place for air to come in and one place for air to exhaust now specifically we're installing a zender erv in this house and if you're in the north you've probably heard of hrvs that's heat recovery ventilators this is basically the same thing except it's not just going to recover the heat out of the fresh air it's also going to recover energy or enthalpy moisture basically now this is my first floor mainly public spaces here but my master is back there let's actually go up to the second floor in the attic is where this unit's being installed i'll meet you up there all right guys so i've got a big family i've got four kiddos i've got three bedrooms up and my unit actually is going to be above us but before we get there let's talk about what a typical house house a typical house that i would build frankly and have built for years each bathroom is going to have its own exhaust fan sometimes two and my house is a three and a half bath house which means i've got at least three exhaust fans in the master usually you've got one in the toilet room and the shower room so that's five exhaust fans plus you're usually gonna have an exhaust fan out of the laundry room so that's six exhaust fans then you've got a range exhaust you've got usually a dryer port coming out usual house of this size you know a four bedroom house 2700 square feet wouldn't be unusual at all to have eight different fans eight different penetrations out of your envelope places that are gonna leak they could bring squirrels and bugs in they could have all these other ancillary issues with this system i don't have any of that everything is going to run through my fresh air system so for instance now we're in my daughter's bedroom upstairs this is the supply and what these little tubes right here are going to do is they're going to constantly puff in just a little bit of fresh air into my daughter's bedroom now we're going to get into the mechanics of that in a second but basically every area of my house where there's a bedroom or a public area is going to have one of those a place to bring fresh air in and then all the other places bathrooms laundry rooms anything that's basically wet or stinky that's going to have an exhaust out and what i love about this system you're going to see in a minute is i just have two inputs i have two eight inch ducts one coming in and one going out and then my erv upstairs is a balance system that being said let's go up and show it to you because this is a really cool system and i actually have the zender rep chris up there as well meet you upstairs oh man i love this attic those look awesome now this will be all conditioned space if you haven't seen my videos i've got a couple inches of exterior insulation and then i'm going to pack these bays full of rockwool so this will be part of my air conditioned envelope but here's the unit and here's chris from zender right here hey chris how's it going matt how's the unit looking man it's looking good uh we've had fun the last couple days jeff and his crew from air right has done a phenomenal job putting this thing together and uh i'm excited to see it fired up in a couple months it looks good yeah all right chris i gave the basics on this unit but give me the nerdy the nerdy stats i made the bold statement this was the world's most efficient best ventilation system can you back that up sure yeah a few things with the zender system first of all it's a this is a the the zender comfortwear q600 erv um and uh basically what we're doing with this uh is we're changing the air throughout the house we're gonna do that on a continuous basis and what makes it the best first and foremost is going to be the performance of the unit itself and i'll break that down and show you a couple things but what you're trying to do is you're trying to ventilate you're trying to control that ventilation you want to you want to uh do it with energy recovery so that you're not you know otherwise just leave the windows open right so if we're in the north we're worried about just an hrv a heat recovery because generally in really cold climates it's low moisture outside but here in the south in the southern us often it's really humid out and if we bring that fresh air in there's a big penalty because now we've got all this humidity to deal with right and all of a sudden if i'm ventilating correctly my house humidity could go way up and i've lost that comfortable feel right yeah so an erv is going to allow you to transfer moisture between the two air streams and how efficient is this in both heating recovery and moisture recovery right with an erv you're going to have a slightly less sensible or heating recovery than you do with an hrv okay but still you're going to be with this unit around 85 percent heat recovery that's 85 of the difference in temperature between outdoors and indoors gotcha so it's a 50 degree delta which would be unusual for me you got a 50 degree delta yeah 85 of that that's right sure i'm going to be able to recover 45 degrees of it or so somewhere in that range okay and and then on that on the the humidity side we're going to recover about two-thirds of the difference between outdoor and indoor humidity and those numbers by the way one of the reasons why i said this is the world's best is those numbers are much higher than all the other units out there now talk to me about the tubes and show us what's happening in the guts if you would sure okay well let's start with the guts first um the q600 is a really smart uh erv so the controls are basically this is a self-balancing unit so the controls are are constantly monitoring the air temperature uh it knows the the altitude that you're at because you plug that in during commissioning and so it can calculate based on density how much air is actually flowing through it wow and it will adjust the supply fan and the exhaust fan independently to constantly maintain balance so if you've got a windy day it's going to pick up on that winds blowing on one side maybe the intake side or the exhaust side it will adjust for it maybe your intake filter starts getting dirty over time it senses that it adjusts the supply fan speed to deal with that and how efficient are those motors too yeah the motors are super efficient what we're looking for is you know basically less than three quarters of a watt per cfm so uh that's that's a pretty good standard and um and the q600 meets it easily so this unit we've kind of engineered by the way positive energy helped me out with the design but you guys do that as well we engineered the system at my house for my conditions my number of people in the house to run at 180 cfm that means we're sucking in 180 cfm and we're pushing out 180 at the same time and when those pipes uh are bringing that in and exhausting so this pipe hasn't been hooked up yet but that's the fresh air in we're bringing it from the north side of the house and then this is the exhaust out we're taking that on the kind of south and west side of the house how does the core work uh to kind of pass those streams without touching each other so what you'll see on the top of the unit here is we have four duct connections and as you said these two are connected to the exterior of the house this is your exhaust this is your intake over here we've got the return coming back okay so we're seeing an area that's going back into the unit from the house yep and here's your supply so it's coming out all the basically have two air streams that are being directed through this heat exchanger core or in your case an enthalpy exchanger yeah um and let's take a look at it and we'll see what it looks like i know you got what three screws on there that you popped out yep get those off and just slide this open it's a big unit too isn't it it's a big unit and a lot of people remark on that if if they've seen ervs at all yeah well and and that could be nice if you're trying to fit it into a compact space but if you're looking for actual performance in your heat and humidity recovery you need surface areas we just need more surface area to be more efficient this core especially that gives you that surface area for that transfer this is called a plate exchanger and the reason it's called that is because what you've got is a series of plates in this basic shape that are stacked together these plates are are formed in such a way that they create channels so here in your case we're going to be pulling return air from your house mainly your bathrooms and kitchen will come through here and it will get directed into this side of the of the core your outdoor air will be coming in around the attic through that back port there and it will be directed into this side and so what we've got is air that's going to get organized and if you think of this center rectangular section of this hex shape as the heat exchange section it gets organized and then we have counter flow happening wow so you've got one airstream on one side of each plate the other airstream on the opposite side of the plate and there's a lot of technology in these cores guys when i was doing my research long before i decided on using zender at my house i was getting into the nerdiness of version one two three and four of these plates and there's still ones on the market that are more version one and two this is really the latest and best technology which has the most amount of surface area so that we're really exchanging that heat from one to the other that's how we're getting that like 85 90 percent efficiency that's crazy numbers yeah what's what you'll usually see uh very common as especially in the north american market but now even in in china is you'll see the the cross flow heat exchanger and you know it's cross flow because it's just a square [Music] and so that basically the two air streams just go past each other like that and each each channel just has one point of contact here uh when you see this hexagonal shape that's when you know you're dealing with a counter flow heat exchanger and you're you just should expect you're going to get much better performance i love it yup now i'm also seeing uh i'm assuming this is a pre-filter because this is uh oh no that's the exhaust right there where's the pre-filter well the exhaust channel is actually coming up from around here okay so inside here we've got some plenums that are directing air around but uh your back port that brings in your outdoor air is what's going to go through this filter so this is your your uh filter for your incoming air and in your case um we've got some additional filtration but normally what we if if we don't have that we'll use this uh merv 13 filter and merv 13 is really good filtration not quite hepa quality but it's the 99.9 that's right kind of quality so we're all the pollen all the mold spores all the nasty stuff before it even gets the core is going to be filled exactly so we're going to protect the core and because this is the outdoor air coming in as supplier at the house we're going to protect everybody in the house too yeah and that filter probably needs to be checked how often you should look at it every quarter okay yeah typical you know maintenance schedule on this side over here we've got a lower grade merv 8 filter and the merv 8 filter is basically filtering your return air from the house and that's only to protect the core all right so you're this your pet dander yeah dust in the house we're trying not to get all that in there and dirty it up because when that core gets dirty the efficiency drops yep we're never recirculating air with this unit ever so we're always doing a constant air exchange this air will always be directed right through your exhaust pipe out that gable end that's awesome so that's really just to protect the core itself and keep it clean and keep that heat exchange going now that's not the only filtration on this unit right though that's right uh in your case and this is uh you know we can we can do this as an option but up here what we've got our supply air coming out before it gets distributed to the house is going to go through an additional filter casing and if we open this up we'll see inside here we've got an upgraded filter this is actually a merv 15 filter and this is getting basically into your hospital outpatient type category of filtration and as you can see you know we've got more surface area so you know we're not going to add a lot of static pressure to the system and we've got a bigger thicker filter that's going to give you a bigger a longer lifespan now what if i wanted even more filtration or let's say i was in a wildfire area there's smoke there's other things can i upgrade that even you yeah the the other option for this uh filter casing right here is an activated charcoal filter uh so a carbon filter and and basically that'll help deal with smoke or orders that might exist in your neighborhood got it so that so if i did have wildfires outside that would filter that out before it sent it into my house yeah we've i've got a colleague out on the west coast he lives near oregon um and he's basically running his system at a lower speed but he's continued his ventilation he's put in an active charcoal filter and um and he's got no smoke inside his house that's awesome yeah all right now one of the things i love about this system and one of the reasons why i chose it is i'm trying to build this really tight house right a house that doesn't have a bunch of air leaking in and i didn't want exhaust fans everywhere and depressurization going on in my house and that's something that i've wrestled with mentally for a long time and that's one of the things i think makes a lot of sense about this system because it's balanced talk to me about the supply and the exhaust and then underneath here if you look underneath we've got basically two manifolds kind of like a structured plumbing system a manifold plumbing system and these two front ones right here this one hasn't been installed yet this is what it's going to look like in a minute these have these little ports on here and we've got 16 of them on the exhaust and underneath in the back we've got 16 on the supply as well talk to me about these chris yeah so what we want to do is we want to give people an engineered solution so when they go to to connect the system up um you know they they don't have to to engineer a trunk and branch system and figure out how much flow is going to be in what's what branch so what we've got is this manifold system we can plan for the same amount of airflow basically to go through each one of these tubes we can connect it to a manifold and give that give every tube on that manifold the same pressure same air pressure and in that way we just plan in multiples in in our case of 12 cfm per tube that's awesome and we decide which room needs you know whether it's 12 24 36 cfm of supply or of return and um and we'll break it down that way and this uh this main part of this box here is actually a silencer so what this is going to do is it's in this case it's the return side so it's going to keep exhaust fan noise from going down these tubes to your your bathroom uh or wherever and it also keeps uh because we're connecting all the rooms to one manifold it keeps crosstalk from the rooms as well from happening so the silencer is good um and then the manifold plate obviously as i said gives us that constant pressure at each tube so this tubing this is uh your version or your product called comfo tube right it looks like corrugated uh pipe almost like a uh you know like a shop vac hose it's very rigid you can't you can't crush it so it's not going to get shoved in like flex duct wood and get crushed and not have air flow but it also has a liner on the inside as well so it's a little smooth it looks corrugated on the on the outside but it's actually smooth on the inside and you guys have a really dialed in system for installing it show me how that works so you know part of the performance of ventilation system is getting the air where you want it and if you create a system that's leaking all over the place you're not getting the air where you want it i'm gonna hold this so you can show sure yeah so what we do with this is is uh in this particular uh uh approach with this comfo tube this by the way is a high density polyethylene tube it's milk jug material got it so we put an o-ring around here and we'll press that down in and basically it seats down inside there and then you've got your air air tightness because the o-ring and then you slide this clip in here and this is going to give you your mechanical fastening so now that tube's not going to come out not coming out and as i said earlier manifold meaning home run so basically we're going from here to the outlet one continuous vacuum mode no joints no couplings nothing just like a you know pex manifold system and the two that are down there already are connected to my daughter's bedroom that i showed you earlier and each one of those as chris said earlier is about 12 cfm and so we're going to decide in each bedroom how many occupants we have and how much supply we need we're also going to think about exhaust right so a laundry room we may have one or two a bathroom we might have one or two a huge bathroom or a bigger wetter you might have three in there you might have more in my master bedroom i've got a three port supply because there's two of us living in the master and the thing i like about the system is it's running continuously so for instance in my kids baths i have a hard time getting them to turn their bath fans on even though i have a countdown timer in there and i say hey when you get in the shower hit that button and it'll count down and run for 30 minutes often times i come after them and realize they never use the exhaust fan i got to hit it in this case this unit's running 24 7. just a little bit of sucking out of those wet and stinky areas and just a little bit of supply to those bedrooms into those public spaces so all night long as i'm sleeping i've got just a little bit of puff of that fresh filtered air from the outside and then in those bathrooms even if they forget to run the um or forget to actually i haven't talked about this but they forget to put it in the boost mode it's always going to be sucking just a little bit out now speaking of boost mode i didn't get into this chris tell us about fan speed yeah and controls for this system because i mentioned earlier my house is designed to run about 180 cfm all the time yep so the nice thing about uh the q series of ervs from zender is again we've got constant balance going on so what you do with this unit is it's got four preset speeds you've got your normal speed which for us is speed two you can have a low speed speed one uh you can have boost mode speed three and then we've got away mode so if you're going away on vacation you basically can kind of put put the thing in away mode it gives a constant trickle just a trickle of air in the house keep it from getting stale but with those four preset speeds you can make them whatever you want in this controller and it will keep track of it and make sure those stay the same i love it then from your controller control panel either in the house or here on the front of the machine or if we collect connect this gateway we can allow you to do it even from your smartphone um you'd be able to jump between those four speeds at any time you want that's great and you can independently adjust those speeds so if you you know in your case we're doing 180 cfm we might add a little bit more just for this attic to keep it fresh but um 180 cfm and uh if if you decide that's too much you don't need that much dial it down to 150 and change your preset no big deal easy yep now what happens if you go on vacation and leave this thing running if you leave it running and you forget to go into away mode then uh just before your flight takes off you get on your app and and you set it back to away mode it'll ask you how long you want it give it a date it'll keep it in way more until that date that's really cool the other thing that i mentioned earlier in the video that i want to come back to is i love that i've only got two uh basically nostrils in my house right i've got this one right here which is exhausting and i've got one on the other side which is bring it in i've eliminated all those bath fans i don't have any of these other random penetrations that i need to seal i just have two now i've gone probably from at least eight in a house like this normally maybe more down to two that is really cool for me that means i've got a much more reliable house the other thing i want to mention on that is a quick example from your car have you ever sat in your car and turned the engine off and it only takes a few minutes really to be uncomfortable and to get comfortable just drop usually just drop the window down by an inch and you've got a little bit of fresh air and you feel much better that's basically the same system that's happening here when your car is running you're bringing a little bit of fresh air and you're comfortable when you're sealed up tightly in a tight house and you don't have that the moisture can build up the vocs are going to build up the co2 is going to build up hopefully there's no carbon monoxide building up but this system is always exhausting and always supplying just a little bit of fresh air speaking of carbon monoxide chris in my house i don't have any combustion appliances i have i'm basically running an all-electric house i have mitsubishi heat pumps for heating and cooling i'm going to be putting a sand and heat pump water heater in i'm going to be using an induction cooktop so i don't have any natural gas appliances so i really don't have anything to make carbon monoxide but let's say you've got somebody who wants a big you know melee gas cooktop with all these burners what can this do in terms of making sure that my carbon monoxide or dioxide levels for that matter are gonna rise yeah as far as carbon monoxide i mean just the regular ventilation rate is gonna is gonna go a long ways to keep the house safe you're going to be constantly changing in your case we'll probably be changing the air about 0.4 times per hour okay through the whole house so that's going to take care of those rates if co2 is an issue or vocs are an issue different environments you know we have basically a control box here that we can connect to the queue your bathroom fan switches will connect to this box but also inside our terminals to connect uh any 0 to 10 volt device like a carbon dioxide sensor or a voc sensor xender sells a carbon dioxide sensor that you can mount on the wall on a bedroom you can put up to four of them on the system um so maybe every bedroom you had multiple you have six friends sleeping over in that bedroom all of a sudden your co2 rises yep this could jump it into into uh boost mode and then you could double the fresh air right into that room is that that's right yeah so it'll monitor the co2 levels and help the fan speed to respond to that man chris i got to say i've seen this installed before but having done it now it feels complicated at first and when you see this you might think oh my gosh but now that i've been on site for two days it's really not very complicated and when i was in vancouver i saw a ton of builders doing it themselves i think if you were a motivated homeowner you could even do this system yourself it's not rocket science they're doing all the layout and the engineering for you so you know what to do all these pipes or home runs they've got a pretty dummy proof uh plug and play manifold i love it chris let's transition it downstairs let's show these guys um what the boots and the outlets look like and how that fresh air is getting delivered sounds good all right we'll meet y'all downstairs so here's where we decided we would set 24 cfm of supply not through the floor but through the ceiling above all right so this is my daughter's bedroom her bed's against that wall right there and that has got two tubes coming to it remember we said they're about 12 cfm per so that supply box is made for that and that supply box basically everything's just plugged in just like you showed me upstairs right chris that's right it goes together the same way that's really easy let's walk over to the boys bedroom and show what that looks like or what it's going to look like and i'm going to grab the termination head here as well so this one we've got screwed to the subfloor now it's ready to get tubes installed we hold that for a second and chris gave me a great tip we haven't done it yet but we're about to do this you can see these are about i don't know six seven eight inches long and this is roughly a five inch uh hole so we did is we took a five inch hole saw right here and we're going to take that onto a piece of plywood that's the same size as your drywall now this is 5 8 zip i've got 5 8 sheet rock i'm going to put a screw here and a screw here i'm going to hold that in place and then what i'm going to use is use this plywood as a template for a saw that's going to zip this off at the level of my sheetrock so when we're done here this will be nice and flush so when the sheetrock guys come i'll be all set and then at commissioning talk to me about the vents that are going to be in each one of those places chris yeah this is our luna diffuser this is our supply diffuser we have a luna extract diffuser as well and basically this is going to fit right up inside that five inch duct right there and uh we're going to air seal it with this gasket that's on the back side pre-gasketed yep yep yep just pop it in and you're air sealed easy as that and then this can be adjusted during commissioning so we just give this cover a little turn and pull it off what we see is it is a locking mechanism if we unlock that which we'll do real quick here we can basically now keep your eyes tuned right here into this this is fixed and this is going to move you'll see as chris turns it we'll see our gap close down as we turn it clockwise if we want to open it up during commissioning and get more airflow we'll we'll back it off counterclockwise once we figure out where we need to be push this in we'll lock it in place and there if it's tamper proof so get the cover back on so it looks beautiful it kind of looks like a little smoke detector on the ceiling there's really nothing to it but one cool thing about this is i don't have to think about duct length or duct sizing or all that stuff i just run a comfo tube to every location and some of my locations are real close to the unit so they're going to have plenty of airflow some of my locations may be 40 feet away of comfort tubes snaking everywhere and then at the end they're going to turn on the fan and when we commission this we're going to put a flow hood up against the ceiling with this and go alright how many cfm do we have coming out do we need more or do we need less dial it in right here so everything gets done later there's no weirdness with i need a two inch or a three inch or a six inch duct here no everything goes with those vacuum cleaner looking hoses comfortable tubes and then later we can dial it in so at this point i don't need anybody from zender on site i appreciate you coming chris but i don't need anybody special just like i said in vancouver i saw builders doing this in their houses they were building for clients their guys ran the tubes they set everything up there was nothing to it maybe a duck guy would do a couple of the rigid connections upstairs but that's really it pretty straightforward chris yeah that's right what did i miss on this tour well when we get this up there and we're adjusting this because the unit is self-adjusting as we close this down or open it up we'll adjust only the airflow in this room the the unit's going to maintain the overall airflow for the whole house so that 180 cfm is going to stay constant even while we make these fine adjustments i love it yeah you know one thing we haven't spoken about and we kind of saved the best for the last talk to me about uh how people can get a bid on this and give us a range of costs what does this system look like from a material standpoint let's say if i'm a builder and want to install it myself and then what would this look like if you're a homeowner watching this who wants it installed on their job or a builder says i just want to get a bid on this right for someone to install yeah no great question so first of all zender is the only company in north america that's currently selling a complete system so you get not only an erv not only the appliance but you get the whole air distribution system that goes with it um and again it's it's engineered to work together so that package cost for a house like this is probably going to be in the neighborhood of ten to twelve thousand dollars for the complete equipment package and that will enthusiastic duct work that's the grills and registers that's all that stuff right includes the erv everything from your exterior grill to these interior diffusers and also includes if you want it a third party commissioning service so that we can get that dialed in a smaller house or a large apartment might be more like five to six thousand dollars for the equipment package okay so it's definitely more than a basic box erv the small ones that i've installed before but what's awesome about the system is really everything's included in there yeah when you y'all shipped that freight out to me i had everything i needed and just a few boxes yeah right and then what about install what do you think if i bought this package what do you think uh install might run on something like us well uh an installer that hasn't seen this package before is gonna scratch their head a little bit and say how do i how do i do this but actually they'll find once they do one that the labor of putting this together is much easier than running a trunk and branch system out of sheet metal it doesn't require the specific skills of working with sheet metal it's more of an assembly project yeah it's an erector set basically you got it so uh i think labor i typically just in rough terms i tell people to expect about half the cost of the equipment package add that on top for your labor to install and you're probably in the ballpark got it yep not bad man chris really appreciate you being in this video with me this this as i've said i've seen it in several houses my buddy steve basic and architect up in boston has specified it and i've seen it installed in his houses but then what really clicked with me was when i saw those builders in vancouver installing themselves with your comfo tube system under construction not just finished houses i said you know that looks not that hard i think we could do it and jeff's been learning the system he's my main installer i think we're good i'm excited to use more of these the last thing that i don't think we mentioned was talk to me about roughly what the running watts of this system might be yeah i mean they're gonna this system right here is probably gonna be the neighborhood of 100 watts or so um but you're you're you're looking at a really low cost of operation yeah yeah not that much at all and again it's running 24 7 and it's exhausting the same amount as it's supplying and i've eliminated all those bath fans that i might spend 120 150 bucks a bath fan on so man great system chris i really appreciate you coming out i'll put a link in the description uh for zender's contact info they are the dominant player in the world in this industry uh they're all over the nation i think they're number one in europe number one in china smaller here in america i want to change that i think this is an incredible system and whether you're building a passive house like i am or you're just building a really good house that's really tight you need a really good system like this guys go check it out very impressive big thanks to xender for sponsoring today's video guys if you're not currently a subscriber hit that subscribe button below we've got new content every tuesday and every friday follow me on twitter instagram otherwise we'll see you next time on the build show [Music] [Music] you

Channel: Matt Risinger

Views: 307,887

Keywords: Matt Risinger, Build Show Network, The Build Show, Build, zehnder, erv, realrebuild, ventilation, hrv, whole house ventilation, hvac, energy recovery ventilators

Id: OrG7oG8Tvp8

Length: 34min 48sec (2088 seconds)

Published: Tue Sep 29 2020