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A comment on Launch HN: Electric Air (YC W23) – Heat pump sold directly to homeowners. Parent comment

Re:Launch HN: Electric Air (YC W23) – Heat pump sold directl... by pkaye on Monday March 13, 2023 @09:29PM (#35146084)
I think the proper method used by HVAC companies is called the manual J method. I found a simplified version below but the real thing involved a whole book.

https://www.indeed.com/career-advice/career-development/manu...

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Re:Launch HN: Electric Air (YC W23) – Heat pump sold directl... by secabeen on Monday March 13, 2023 @11:53PM (#35147235)
This page does the full Manual J, but it is challenging to do and understand. I used it to confirm the estimates that my installer did without a full J workup, and it was helpful.

https://loadcalc.net/

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