Mitsubishi's are very good, daikin and others are not bad either.
Size it with loadcalc.net. Other sites work too. For the attic, you'd use either a separate system, or a multi head version" (look at Mitsubishi's r2 systems)
It's very possible to do the job yourself. Do a search on here, it's been talked about several times. That will get you started on the right path, then ask more questions here.
Mitsubishi, daikin, LG, york, etc all do a fantastic job during both sides of the heat pump cycle. "making heat" or rejecting it for a/c, are both very adequate. Even in places much further north, like Alberta or Ontario, etc. I've seen Mitsubishi air source HPs used for primary heat for whole buildings here. (No backup heat)
Cheers!
Size it with loadcalc.net. Other sites work too. For the attic, you'd use either a separate system, or a multi head version" (look at Mitsubishi's r2 systems)
It's very possible to do the job yourself. Do a search on here, it's been talked about several times. That will get you started on the right path, then ask more questions here.
Mitsubishi, daikin, LG, york, etc all do a fantastic job during both sides of the heat pump cycle. "making heat" or rejecting it for a/c, are both very adequate. Even in places much further north, like Alberta or Ontario, etc. I've seen Mitsubishi air source HPs used for primary heat for whole buildings here. (No backup heat)
Cheers!