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So one contractor is stating that a higher btu unit will have a heat pump that operates in lower outdoor temperatures, and below a certain outdoor temperature a smaller unit will produce less heat?
"The output mostly depends on the outdoor temperature, but as you can see it does differ with indoor temperatures as well but very minimal.
It isn't a calculation of how much load is needed like it would be in manual J.
For instance if you take a look at the chart in the red box. It shows you the output for the 24 degrees farenheit outdoor temperature with indoor temperature of 64 degrees will only give you 9.51K BTU on the Art Cool Gallery unit. Which is not enough for your need of 12K you mentioned when the temperature goes that low."
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