AlexMc

I was assuming that the need for heat during the spring and summer wouldn't be much, but your point is well taken.

I’m not familiar with the Genex system, but I’ll check it out. The DHW unit draws air from outside and could be located in the attached garage. There’s also a system from Nilan that looks promising. It’s essentially a MVHR that has a small heat pump and DHW storage. I did a quick heat loss, and I’m looking at around 3 to 3.5kW which is pretty good. Seems like everyone I talk too recommends a 8kW to 11kW heat pump. Not making sense to me, but I may be missing something.

I was thinking about installing anASHP water heater like https://www.modernheat.co.uk/product/2484/ for all my hot water needs, and a mono block ASHP strictly for heating. I know it’s more expensive, but I suspect I will get better performance since my new build will be a highly insulated envelope and hopefully won’t need much, if any, heating for most of the year. Has anyone ever done this? Is it a good idea? I’d appreciate your comments and don’t mind being told it’s a bad idea (as long as you keep it respectful and tell me why). Thanks.

Hi everyone. My name is Alex and I am building a new timber frame building in Co. Antrim, NI. This is my first self-build and am just getting started with the foundations. I'm looking forward to sharing my experience and learning from others who have done, or are doing, the same thing. Any tips or advice are certainly welcome and much appreciated. Cheers!