Heat loss calculation for a ductless system
I did a thorough whole house heat loss calculation for my project when I was considering doing radiant floor heat but I have now decided to go with a Ductless Mini Split system. On one of the final tables of my spreadsheet (where I calculate design day requirements), I seem to have put in a “Boiler Efficiency” factor most likely for the heat source for the water for the hydronics. When it comes to sizing the outdoor units, should I leave that final adjustment? I attached a picture of the table showing the data. All I have read about the outdoor units suggests that they should be sized very closely with one’s requirements so I am thinking this last calculation is not going to be valid for a MSP outdoor unit. Any thoughts? The good news is that my spreadsheet does have all the correct dimensions, areas, material specifications (U-Factors) and infiltration calculations. I just want to make sure the coldest day requirement doesn’t come up short.
Thanks in advance.
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