Compact Unit

[pdf27]

Has anybody apart from @PeterStarck used a compact unit (i.e. combined heating, ventilation and hot water in one box) in their build, and if so what has your experience been?

We're in the planning stages for a Passivhaus, and the layout we have at the moment actually looks very suitable for a compact unit in the utility room.

We've also got a huge back garden, and since Nilan do a compact unit with a 3kW built in GSHP I'm starting to suspect that might be a very good option for us since it doesn't seem to be much more expensive than the base model.

[SteamyTea]

7 minutes ago, pdf27 said:

GSHP

EAHP

https://en.wikipedia.org/wiki/Exhaust_air_heat_pump

[pdf27]

9 minutes ago, SteamyTea said:

EAHP

https://en.wikipedia.org/wiki/Exhaust_air_heat_pump

Nope, they also do ones with add-ons for external ASHP or GSHP coils not just as EAHPs - https://en.nilan.dk/en-gb/frontpage/solutions/domestic-solutions/compact-solutions/domestic-solutions-total-solutions-compact-p-range/compact-p-geo

How well EAHPs work will depend on how big your incidental & solar gains are, my suspicion is that in our case they won't be high enough to work well.

[SteamyTea]

20 minutes ago, pdf27 said:

Nope, they also do ones with add-ons for external ASHP or GSHP coils not just as EAHPs 

Interesting.

20 minutes ago, pdf27 said:

how big your incidental & solar gains are

Yes, no good for me.