DIYbanter - View Single Post

wrote:
Alan wrote:

Thanks, I often wondered about the efficiency of running A/C heat pump
systems all year to heat and cool a building as required.

It works well in places with mild climates.

Ground source heating is used in places like Canada, where the
underground temp is way above ambient.

The greater the temp diff
between outdoor and in, the less effieicnt it gets.

Underground pipes make sure that differential isn't as high.

So its inefficienct
in the coldest weather, not ideal.

It's not bad if you use below ground as your heat source.

Still better than plug in leccy
heaters tho.

The other issue is the upfront cost. I gather this has fallen a lot now
tho.

It should keep falling in relation to energy costs.

I guess by the same token, the cooling process is reasonably energy
efficient also.

not compared to the other options, no.

NT