3 ms·

Correct (and thanks for the link to that unit). Though it’s worth noting that that first 2 ton rated unit is putting out 0.5 tons (6k BTU/hr) at that temp and

Correct (and thanks for the link to that unit). Though it’s worth noting that that first 2 ton rated unit is putting out 0.5 tons (6k BTU/hr) at that temp and rating. That’s not going to be particularly helpful for a structure that needed 24k BTU/hr during warmer temps, meaning the owner of the unit is likely mixing in a lot of 1.0 BTUs to meet the heat loss at -13°F.

throw0101a 1y ago
> Though it’s worth noting that that first 2 ton rated unit is putting out 0.5 tons (6k BTU/hr) at that temp and rating. I just did a quick search for "all" units and sorted the result list/table by COP@5F. If one was actually shopping/designing a solution then a more nuanced search criteria would be used. Further, you'd probably want to do a (US ACCA) Manual J calculation to first determine how much energy is needed (j = joules) * https://www.youtube.com/@HomePerformance/search?query=manual%20j https://www.youtube.com/@HomePerformance/search?query=manual... Then the (US ACCA) Manual S (select) to figure out your equipment: * https://www.youtube.com/@HomePerformance/search?query=manual%20s https://www.youtube.com/@HomePerformance/search?query=manual... One can lookup the 1% (or 0.4%) of coldest/hottest days for your area, which would help determine what one actually has to typically worry about: * https://ashrae-meteo.info/v2.0/ https://ashrae-meteo.info/v2.0/ * https://www.airequipmentcompany.com/2021/what-does-design-day-really-mean/ https://www.airequipmentcompany.com/2021/what-does-design-da...