Hi
Can anyone help me im making a ground source heat pump to do heating only in my home.
i need cond temps of 40-75 oC for heating and hot water
I have been looking at copeland scroll compressors
Looking around most heatpumps seem to run on r410a
but i dont think this can get the tempratures im looking for.
http://www.ecopeland.com/prodcat.cfm...ref=7&prod=528

but would i be better using r134a as i think this will reach the desired temp http://www.ecopeland.com/prodcat.cfm...f=8&prod=30692

But i must have a good c.o.p. r410a heatpumps seem to have a cop of around 3-5 but i cant find any heatpumps using r134a

i know that my ground loop water through my evap will be at a constant 4-8 oC

so would that suggest that 410a is a lot more efficient than 134a??
any help please before i buy an expensive compressor thats no good...