Pro-Generated Manual J Calculations
Good morning folks, I am located in Calgary Alberta. We have a new home under construction, through a home builder. It’s been difficult getting much support to make the home tighter, more efficient, beyond the basic builder expectations around building code, with the exception of using AeroBarrier a at the drywall stage (there only option). We had some limited inputs with the HVAC contractor, but is limited by the contract with the builder.
After possession, my wife and I would like to look at heat pump installation. There are a “FEW” HVAC contractors in the area that appear to have some experience with installations. I’ve reached out to a couple, limited response, with only vague equipment configuration offerings. Given the climate, we are looking at the dual fuel systems as nat gas is the street connection. I have run my own calculations using https://hvac.betterbuiltnw.com/ and came out with a VERY low number (heat load) compared to the HVAC contractor who used WRIGHTSOFT. My rough number was 54000 btu/hr, vs 98000 btu/hr which aligns with the furnace choices already offered. Can anyone recommend a local to Alberta firm that would do/assist with a manual J to ensure a proper calculation. Behind all this is out intention to use a heat pump for AC/HEAT as much as reasonably possible given the winter cold temps. Eventually (2-3 years) we intend to install a full solar array to more fully offset the heat pumps electrical consumption.
2700 ft above grade, 1100 below grade, typical 2×6 walls, batt insulation, insulated slab, roughed in for hydronic in the basement. Low-e – triple pane windows.
Thoughts? Helpful guidance here. Thank you.
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