Air-to-Water Heat Pump vs. Electric Boiler
I’ve been doing lots of reading on this site and others. I have read a few articles on having a highly insulated house with radiant in-floor heat. I am trying to decide if it is worth the cost of installing an Air-to-water heat pump, or to go with an electric boiler. After 1 year, I would have a good understanding of my energy consumption and build a solar array accordingly.
Our house will be 2000sq, 25′ wide and 42′ long, with the front facing south with a good amount of glazing. Exterior walls with be R47 which includes 4” of exterior mineral wool. Attic is R88 of blown in cellulose and the slab on grade with have R20 underneath. Our window package is quad pane, with a U value of .15 or a R value of R6.66.
As you can see it should be a well insulated home and we will put our attention into proper air sealing of the envelope. I am wondering if people think it is worth spending the money on a ATWHP, which I have been pricing out the Arctic HP and buffer tank/DHW.. just north of 20,000, which would include everything. Or if a in-floor heating system with a electric boiler would be the better choice, and in a years time it would be supplemented with a PV array.
We are located in the Yukon, which I believe is climate zone 7A.
Thank you for your feedback.
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