Air to water with cooling

the_amazing_raisin

Question for folks with Air to water heat pumps with cooling capability

What kind of emitters are you using and how is the system performing in summer when you want cooling?

I saw a video on heat geeks where they tried the cooling system with normal rads and it basically cooled up to the bottom of the rad and stopped because there was no convection

https://www.youtube.com/watch?v=GKDucs4zl7Y

So it seems some kind of fan assistance is needed. I guess underfloor cooling would have similar problems to radiators

Are people using fan assisted radiators or linking them into a ventilation system?

graememk

https://www.boards.ie/discussion/2058266750/air-to-water-with-cooling

Apparently if radiators are piped from the top on one side to the bottom of the other they work 5% more than the rated value.

The way we do it, bottom in bottom out, is 4% less than rated, and the "standard" is in the top, and out the bottom on the same side.

https://youtu.be/ogyGJr0s4y0

18:40 mins in.

I suppose if looking to cool, rads need to be plumbed like the thumbnail.

the_amazing_raisin

Yeah I guess the question is if I were going to the hassle and expense of replacing the heat pump with a better model, then does it make sense to replace the rads with fan assisted ones, or go for a ventilation system

If I'd have to replumb the rads to get the cooling system to work properly, then maybe it just makes sense to go all in

keno-daytrader

We used our heat pump to cool the house during the really hot spells the last 2 years, I was amazed at how well it worked, however we do have underfloor heating/cooling everywhere, no rads.

Mr Q

https://www.boards.ie/discussion/comment/119725322#Comment_119725322

Same here. Worked better than I expected after hearing some wrong information beforehand.

NIBE A2W and UFH. Also with PV during the summer it would be using the excess.