Minisplit Condenser Efficiency
I am looking for some guidance on mini-split condenser efficiency. I have calculated cooling loads for my home (accounting for elevation derating), for the heads shown below. 3 of the 5 heads are upstairs and will be used regularly during cooling season, 2 of the 5 heads (movie, breezeway) are downstairs (partially below grade), and will be used intermittently, at most. I am only using the system for cooling.
The DSB I ran (shown below) indicates a 48K BTU condenser will run the system fine – 125%. Considering the heads that will run regularly – 88%.
One installer, who I would like to work with, was recommending I go with a 60k condenser (100%) and actually included it in his bid.
Am I understanding correctly that, in my situation, the system will perform more efficiently with the 48K condenser?
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