Another mini split sizing!
We are looking to upgrade from electric bb heat to a mini split with both air & heat. Location Langley BC.
We live in a in law suite above a garage and 2rooms beneath us. So the mini split will heat only the 2nd floor open concept kitchen& family room including a small 8×9 bathroom,
Total square footage about 800. There is a 120 square foot bedroom which we don’t heat ,it stays at about 58-65 F during the winter
So instead of a manual J, I have an efergy meter installed in rhe sub panel and I have been monitoring my hydro for the past 2 years.
I have 2 -500 watt bb &1 1250watt bb (2250×3413=7679 btu) to heat the upstairs.
This is enough to heat the upstairs unless it gets really cold15-20F , then I need to supplement with a portable 1500 watt heater to get the night time set back temperature from 62 to 68 F.
The mean temperature in January and February is 33F night and 36 F days.
It rarely goes much below freezing here.
When looking at internet web sites for mini split sizings they recommend 9000 -12000 btu for 400 square feet 18000 for 800 square feet.
Am I missing something or will a 9000 btu or even a 12000 btu model heat our square footage in this milder validate?
Am looking at a gree mini split: 9000 btu model specs:cooling cap 1535-12966 , heating 2388- 13648, seer 38, hspf 15.
Gree 12000 btu cooling cap 3100-13000, heating 3071- 18766 , seer 30,5 , hspf 14.
10 year parts & compresser warranty.
I think either one would work without short cycling.
Any thoughts ?
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