Thinking about a 3/4 to one ton inverter drive ductless unit in the living room, and using it to heat as much of the house as possible as if it were a wood stove. I like wood stoves, but with the cost of the chimney and fire insurance they can't really save me much money.
From a search of old posts here, it looks like the good brands are Mitsubishi, Fujitsu, (and maybe LG if carefully grounded and surge protected)?
As a recent thread mentions, the 3/4 ton units have higher SEER than the 1 ton units, and it looks like the Halcyon and Mr Slim don't show much more heat output for the 1 ton.
I'm currently on a propane furnace at $2.20 a gallon with 95% AFUE. My electric rates are about 12.5 cents per kwh. Furnace duty cycle suggests that my design load is about 25,000 BTU at 0 degrees. Last summer I was able to keep the house livable on all but the hottest days with a 5,000 BTU window unit and fans. I put the first AC on high at dawn and turned on a second 5000 btu unit at noon, and it kept the house at 78 degrees on a 103 degree afternoon.
It looks like I can meet all my AC needs and help out a bit on heating with any of the 20+ SEER Mitsubishi and Fujitsu 3/4 ton units (FE09/GE09 and 9RLF/9RLS). I never had an electric bill over 250 kwh last summer if that shows how little I use AC.
Since I care a lot more about heat than AC, should I ask the installer to place the wall unit lower than usual?
Should I insist on best practices like surge protection, grounding the condenser to earth or a nitrogen pressure test, or just let him do his job his way and hope for the best?