3 ms·
Your point stands, but your 1,500 sqft home needs about 68,000 btus. That heatpump would be for about a 300-400 sqft room.
by yial 4y ago
Your point stands, but your 1,500 sqft home needs about 68,000 btus.
That heatpump would be for about a 300-400 sqft room.
- morsch 4y agoSeems like a bigger one would only be more efficient.
- rgmerk 4y agoSurprisingly, this doesn’t seem to be true for most of the split system ductless heat pumps (aka “reverse cycle air conditioners), I’ve seen. The smallest ones are almost the most efficient ones in the range. I’m not sure why this is, and whether it generalises to house-size ducted systems, but it’s pretty striking nonetheless because it’s the exact opposite of most heat related systems I can think of.
- dd36 4y agoMight it be because the surrounding air only has so much heat in it? Thus, smaller units, more spread out, have access to more heat?
- yial 4y agoI don’t know why - But your single air exchange heat pump driving a single head unit in the 9,000-12,000 range seems to be incredibly efficient. Once you go to a larger unit, and more heads, the efficiency drops. It’s fascinating to even see the huge increase in switchable units - running your 4/5 ton unit at 4 tons is much more efficient. (Usually)