heat pump a/c

[Nick Badame Refrig/ACC]

Oh, ok.

It all depends on whether the BTU's can be delivered to the interior completely, or only partially.

Electric heaters, all the BTU's will be delivered to the interior, no where for any of it to go.

The coolant furnaces/boilers may inhale fuel for certain BTU ratings, but they are dependent on the installed radiator/fan systems to shed the BTU's to the interior, and have losses to the exterior in exhaust heat.

Same for a propane furnace, some heat overboard in the exhaust.

So, it still needs a bunch of thinking, we can't just throw BTU numbers around?

happy coaching!
buswarrior

Good point about efficencies of heat sources!! I forgot to mention BW. Thanks!

Nick-

[buswarrior]

Just for fun and education,

I've been holding the house steady at 70 degrees using 7 x 1500 watt cheapy electric heaters for the last few days. Furnace fan and ceiling fans running to circulate the air, 2 of the 7 have temp controls and cut in and out periodically, the other 5 running flat out..

So, at approximately 5k BTU each, under 35 000 BTU, plus the heat shedding of a refrigerator, a freezer, 2 computers, and 4 humans and 2 dogs. Coffee pot has the tank of water, so there's a bit of heat there even when the burner is off, and the television, on or off, makes a bit of warmth. So, that might account for as much as 20K BTU more heating?

with 10 degrees outside with a breeze blowing to -8 windchill.
2 story, plus basement, somewhere under 1800 sq feet on the 2 floors, lots of window and french doors at the back.

Makes me wonder what economies are available in the hotrod furnace in the basement that has a 100K rating, but then, some of that is going up the chimney, and drafting cold air into the house, so maybe a break even is in here someplace?

I'm off to where the coach is parked tomorrow for a few days and will run some similar winter condition testing.

Gotta use this cold weather for something good!

happy coaching!
buswarrior