My HVAC guy disagrees with PH Planning Package
The Passive House Planning Package indicates that the heat load for my house should be 7,722 BTU/hr (4.4 BTU/hr-sqft, and the cooling should be 3,573 BTU/hr (2.0 BTU/hr-sqft).
I gave these numbers, and the entire PHPP file to my HVAC person. He was dumbfounded by the low numbers and ran our plans through a detailed Manual J calculations. Now, he admits that he cannot account for the superinsulated slab, but he came up with much higher numbers.
The quote is for various versions of a Carrier 38Mxx / 40xxxx (3 ton heat pump. So much for heating the house with a hair dryer…….)
Not that it makes much of a difference to his calculations, but we will have a BuildEquinox CERV installed.
We were thinking that a single small Japanese mini split would be sufficient for heating and cooling (open doors will have to replace multi-head outputs or ducting).
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