We have been building a house for the past year in Vermont, zip 05757. The original plan for heating the house was using our wood boiler that we will use to heat our greenhouse as our main heat source. We guessed one ore two radiators would be enough. The greenhouse is used for our farm business and the boiler has a BTU rating that can run between 30 and 80kBtu.
We are off grid so we thought that we would be more limited on power during the winter. It turns out we have a very good microhydro numbers during the heating months.
This means we could potentially run a mini split as either back up heat or main heat if we leave for a long period of time.
We just got a blower test done today. It came out as .808ACH50. I ran the house through HeatCad 2019 and came up with a heat load of 18,499 Btu/hr. I’m no expert at modeling but I think I have done a half decent job modeling the house.
The building is 24×40 with a walk out with the 40′ being one of the fully exposed sides. And is true rough cut 2×6 with dense pack cellulose that will have 2.5″ of polyiso on the exterior. The basement wall is AMVIC ICF which they rate at 30R.
The walk out level is where the two main bedrooms and family room are.
The main floor is 8.5′ ceilings with true 6″ of dense pack cellulose with 2.5″ exterior polyiso. It is mostly open with only two rooms a bathroom and an office/bedroom.
The attic above it is vented through the soffits and peak with 18+” of loose fill cellulose.
I was thinking we could get away with a head unit in the center of walkout level near the open stairwell. We do have a bit to much south glazing with not so great windows.
We would also like the option of having AC for those heat waves we keep getting once or twice a summer.
Any recommendations would be great.
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