How To Install an Ultra Efficient Heating System - Heat Pump + UFH.

today we are on a very interesting project in London what we are doing here we are installing a super efficient heating system based on an air source heat pump and underthrow heating throughout so in this video I Will Show You full installation of a Ultra efficient system based on an nuro heat pump so the property itself I think it's 60s or 70s built it has already insulated cavity walls but what they've done as well they've put this paint that seals all the air gaps and they also have a air tightness membranes on the walls so they sealing the whole property using different techniques to make sure there are absolute minimum air changes you can see some of those membranes already uh right here they started installing them on the ceilings those pipes there on the ceiling as well it's what's called an mvhr so that's a mechanical ventilation heat recovery system what it means is simply there's a heat exchanger so warm air leaving the property goes through the heat exchanger and cooler coming into the property gets warmed up so that limits the heat loss of the property even further on this floor we are installing under for hitting throughout this is the top floor so Simon here is putting those uh pels for the bathroom on tile adhesive so they'll get tiled over in other areas that get Timber floor finishes we'll be using what's called uh XPS panel so this is just a insulated panel with aluminum foil on top that will be put on the floor on contact adhesive so that's the manifold for downstairs not piped yet primary pipe work the insulated pipework is a primary pip work from the heat pump that goes all the way across here and across to the heat pump in the garden and this 22 mm pip work excuse me all those wires is the PIP workk going through here across there right there to the manifold upstairs [Music] so the heat pump is already in place and Simon is wiring it as we've got primary Pro insulation on the primary pip workk there and I know you're looking at the unit you're thinking this doesn't comply this is properly next to Windows those are non openable Windows below the level of the unit only above some 200 m above the unit those windows open so yes it does comply and Marie is doing an awful job of putting clips into the PIP work by hand simply because those clips don't fit my gun on the bench the PIP work is lifting the panels so we have to clip them in and we only have 20 M Insulation below which makes it really hard to clip as well and as you can see the pipe spacing varies 150 in the bathroom 200 by the uh entrance 150 spacing in the main living area 200 in this room because it doesn't have external walls and 200 in two bedrooms because they are designed to slightly lower temperature of 18° not 21 and upstairs everything is 150 centers and I had to Route some channels and also what they asked me to do is to install pip workk on this ra platform right here by the window so we'll be going I had to cut out a bit bit of a hole in this insulation and it will be going through through here with the pipe work so under for heating it will be pressure tested on both floors scooting company then will come and we'll come back here in about I would imagine a month once they've got flooring done tiling done so we will install cylinder in that cupboard and controls and commission the system so we back to this site today and the last time we were here was when Marie started working for me around 5 months ago so some of those renovation sites they do take a while let's have a look uh what they've done I know the builders are gone already so it's just finishing off or putting furniture in let's see inside so it does look like it's mostly finished finished uh it's just floors being protected and final decorations and I can see electricians are probably doing uh second fix now so they are not far from being completed and our unit is still out there in the garden and the plant room is going to be here under the stairs so I'm going to go to the shop to get bits and pieces and when I'm back I expect cylinder connected the whole plant room finished right the whole thing no brakes to each them no breakes all right see you later taking into the account that mvhr setup uh we have here 130 square m of floor area with an average heat loss of 26 wat per square meter that takes us to 3.5 KW total heat loss for this property so 130 s m two bedrooms here and two bedrooms downstairs it's a four bedroom uh link detached house I would say cuz it's linked by the roof terce to another property uh so the heat load heating load uh heating requirements going to be really minimal that's why we can afford larger spacings on underf floor hitting it's 150 centers and also High Top Value flooring Timber floors it kind of doesn't matter we're still going to run this setup at very very low flow temperatures at very high efficiencies the design is well below 35 uh C Celsius flow temperature for the flow of the heat pump which takes us uh to around uh scops of around 4.5 maybe even five uh which means we've got efficiencies of well people hate when I say efficiencies of 450 or 500% but to put it differently 1 Kow of electricity will transport 4 KW of uh heat into the property resulting with 5 kilow of usable heat for every uh 1 Kow hour of of uh electricity so not much left almost done almost finished with the plant rum had to take had to take the Press away from Marie because it's getting late we need to get it finished today now don't look at this that's not a ball uh filter we remove those they get supplied with heat pumps and because those are so useless the 28 M it's just too small for heat pumps or vanish size we use them as regular isolating valves to just remove the strainer so that's our strainer wi strainer so it doesn't block as easily a much lower pressure loss prefer those a lot and it's such a tiny room I thought we would struggle here but actually the cylinder fits really nicely and there's still space for whatever they want to put in here let's turn the power on the unit on so we've got this setup running now there's still tons of Earth so I have to purge the system and the piper goes through the roof so there'll be a lot of venting you you can hear it right the most important thing for me is to check the actual flow rates if I'm getting uh my required flow rates which for this property with 3 and A2 kilowatt it's only around 6 700 lit per per hour but the unit I want it to be able to run uh at much higher flow rates at 12200 L just to know that the pump doesn't have to work on that unit like crazy which it shouldn't if my calculations check out I can already see on the flow Setters that I'll be fine with my flow rates I'm getting 3 L per per Loop so I'll have to be throttling it down or throttling the pump on the unit down I think it's an AO right now so right now I'm getting 865 L per hour that is probably about 250 L more than we need but let's see what the pump is set to it's definitely not 100% it's Auto let's see what it does on 100% so I know what the system can provide in terms of a flow rate yeah so it is an auto we're going to swap it to just for testing 100% you can hear it speeding up like crazy and now go to life monitor as you can see uh almost 1300 l so my system is completely fine that pump will run at pretty low power to provide around 6 700 L per hour to satisfy heat loss of this property at dt5 so I'm going to go back to the menu set it back to Auto I don't want to run it that fast there there's just no need the unit's been running all night and what a perfect day to test a heat pump because it's one of those very unusual days in London when you've got frost everywhere and it's minus one in the morning and the unit is is running hard you can see even Frost here and it's might just about to go to defrost as well cuz it's pretty much frosted up on the back before we insulate the PIP workk intern let me talk you through how it's piped so if you've got one installed or if you're installing one yourself you know how to do it so obviously we got two pipes coming to it on the back flow and return and they go inside and they go up inside through the Loft to the plant room around 15 M run of flow and return so we've got total 30 m of 28 mil copper going from this 5 Kow unit to the underair cardboard where the cylinder is this is the plant room so the heat pump is outside that window the piper goes above here all the way across to the plant room here and that's my main pipe work here so flow comes down here and goes all the way to the diverter valve this diverter valve is normally open for heating and normally close close to the cylinder and it only uh can be open to one or the other it's not a mid position valve then it goes here and it goes this pipe is flow going to the manifold upstairs and that's return and this pump here is flow to this manifold for the ground floor and that's a return that's a return from uh the manifolds right here from this one one and it goes right here to upstairs as well coming from upstairs so that's a return from the manifold upstairs and it goes down here meets with this return from this manifold and that's a return from the cylinder and that return goes back to that's a feeling Loop here expansion vessel on the return going back going back isolating valve no strainer here do are useless too small don't use them they block too easily and a wise trainer going back to the heat pump that needs to be positioned down so any dirt in the system will just fall off here and you can clean it that's why you've got one isolation valve here another one there so Marie installed those uh she should have installed it slightly lower cuz now we have to drain all this water in this pip work if we clean that filter not a big deal but ideally it would have been somewhere here and then we have obviously expansion vessel fing loop with the pressure gauge and flow to the cylinder one OT vent on the coil to the cylinder right here on the flow there's no need on for for one on the return and that's that's the pipe work so what you don't see here you don't see a volumizer and you don't see a buffer uh reason being is the pump in the unit outside is fully able to provide me the flow that I need and how do you know what flow you need uh you use uh equations you use mass flow triangle and if you in heating everyone should know it by hard so the flow required is power or your heat loss divided by uh DT so the difference between flow and return on heat pumps in in in Celsius so on heat pumps we design to 5° on condensing boilers for example it's 20° dt5 dt20 multiplied by specific heat capacity of water which is 4.2 KJ so in this case if we were to say we've got uh 3.5 kilow heat loss at this property which is about right but that's taking into account mvhr as well so let's say without mvhr running now would be probably around four so let's say four so if you got four kilowatt heat loss so our power we have to divide it by dt5 cuz that's how we run this system so flow we run at 35° now return at 30 and multiply by specific heat capacity of water so we going to do the bottom of the equation first so 4.2 K multiplied by 5 gives us 21 and we have to divide our heat loss power 4 ided by 21 and that gives us 0.19 l a second so that's the flow this system needs those controls they they show flow in liters per per hour so we can read what flow we are getting so we have to multiply it by by seconds in an hour 3,600 and we're getting 685 L per hour that's what this system needs to provide 4 kilow of power to the property at uh dt5 a lot of people are uh commenting below videos when we talk about not installing batteries that you need them for defrost that is correct you need volume for defrost you need minimum amounts of volume per per kilowatt however if you calculate the volume of this system you realize we've got plenty of volume more than we need long primary pipe we're going to the units plenty of volume in this system provided you run it open you don't Zone it if we were zoning it down as you can see on the manifold there's no actuators anywhere we don't run any additional controls so we run the system what it's called open loop uh it's always fully open and again this is something that confus uses people because you see comments how do you control temperature in rooms if you don't have any controls uh the answer is you control it by correctly designing the system when you design the system we designed this whole system ourselves uh you calculate the heat loss of every single room and then you calculate the flow rate required for every room to provide the exact amount of energy needed for that room and then we keep bedrooms at 18° uh 17 18° or or 19 and then living areas such as living rooms uh art 20 21 22 you know whatever your choice is but there will be different outputs in bedrooms and living areas

Channel: Urban Plumbers

Views: 79,701

Keywords: heat pump, heat pumps, heat pumps explained, how does a heat pump work, how heat pumps work, air source heat pump system, heating system, heat pump installation, how does a heat pump work in a house, heat pumps explained uk

Id: GKb1WhtjHdc

Length: 16min 24sec (984 seconds)

Published: Mon Dec 04 2023