Single Fujitsu 12K on AOU24RLXFZH Multi
In a multi-head set up where only one wall unit is primarily used for heating (other unit is in 3rd floor attic), is the max output at 17F and 5F reduced even though the exterior condenser has a max 25K BTU available at 5F? What can I expect for an output at 5F?
I used 1150 therms in the ’16-17 winter months with an old steam boiler at best 82% efficient. With 5332HDD, I came up with an average of 790 BTU/degree hour. If I remove the 33% pickup factor maybe I’m down to 530 BTU/degree hour in my conditioned space of 1900sqft outside of Boston.
Just curious how much I can expect from that head on the first floor to carry the load at lower temps in conjunction with the radiators. That master spreadsheet was very helpful.
GBA Detail Library
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