Speaking of half-assed ground sourcing: when I connect the portable heat pump in the dining room, with the exhaust out that window, I figure that the air coming in to replace the cold exhausted air is mainly coming in through the foundation, and being warmed by the cellar, which is in turn warmed by the ground... I may even try to rig a conduit to bring up cellar air more directly.
On a darker note, I've been looking for an air source heat pump that is affordable for us (my housemate has veto power over spending, and she's fairly Cheap) and that will directly replace the 13.0 EER central A/C unit on the North wall of the house, sending heat as well as cold to the A coil in the furnace. The two units were sold and installed as a pair, and the furnace manufacturer says that while they no longer sell heat pumps, what I suggest is quite possible. The Interweb as a whole, however, says:
NO, NO, NO!
I'm not looking for super high efficiency at a price of $5k. I want to avoid running the oil furnace when temps are above about 20F. Opinions? Suggestions? The local installers take a $3k heat pump, install it, and charge $8500, although that, presumable, is with a new, matched air handler. I want to take a $3k heat pump, and have it connected to the same lines that currently carry refrigerant for the central A/C. The A/C unit is rated at, depending on which sub-model it is, between 29,000 and 36,000 BTUs. Does that limit me to a 36k BTU heat pump, or can I go higher?
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.