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Xringer · 07-13-13, 06:15 AM

Our total living area is only 1258 sq ft. And, I have no idea of how many BTUs it takes to heat all of it. Not a clue.
These units don't run at a fixed power level, they are self-variable.
One could be using 10 watts and the other using 1200w for 215 seconds..
The only thing I can look at is the power bill, weather conditions and guesstimate.
I've posted the average kWh usage. I'm not willing to hook-up a BTUh test machine to my house yet..

Here are a few of things about this house:
1. This a 1956 (pre-good-insulation) house.
2. The den has a LOT of glass and medium-to-poor floor, wall & ceiling insulation (elevated deck construction/no crawl space).
3. Early on, we heated the house using 1 unit, with the den closed off. (too cold in there).
4. I had no choice in sizing the den unit. We had to use 24k. (10 to 12k would have been just fine).
5. Since we are old retired folks, in winter, we keep the heat around 70F 24/7.

The den is the 16x18 in the back..

Oops, time to get back to work on the PVC decking..

07-13-13, 06:15 AM	#509
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Our total living area is only 1258 sq ft. And, I have no idea of how many BTUs it takes to heat all of it. Not a clue. These units don't run at a fixed power level, they are self-variable. One could be using 10 watts and the other using 1200w for 215 seconds.. The only thing I can look at is the power bill, weather conditions and guesstimate. I've posted the average kWh usage. I'm not willing to hook-up a BTUh test machine to my house yet.. Here are a few of things about this house: 1. This a 1956 (pre-good-insulation) house. 2. The den has a LOT of glass and medium-to-poor floor, wall & ceiling insulation (elevated deck construction/no crawl space). 3. Early on, we heated the house using 1 unit, with the den closed off. (too cold in there). 4. I had no choice in sizing the den unit. We had to use 24k. (10 to 12k would have been just fine). 5. Since we are old retired folks, in winter, we keep the heat around 70F 24/7. The den is the 16x18 in the back.. Oops, time to get back to work on the PVC decking.. Attached Images __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..