Purposedly oversized Passive Solar glazing, Heat Pump Water Heater, and exterior shades..
A recent question with regards to heating a basement slab via radiant due to chilled air got me thinking of an idea I had regarding a scheme I had.
We’re all more or less in agreement that HPWH are a ‘Good Thing’ given their ability to extract heat at a fairly high COP. Their main downside in a cold climate being their contribution to the heating load.
We’re also more or less in agreement that Passive Solar in cold climates is a ‘Great Thing’ since the sun is free eh?.
Generally when one is planning Passive Solar houses, I would assume the it would be prudent to calculate heat loads, and plan to avoid overheating due to excessive glazing. However, if you were to merge the two technologies, how difficult would it be to predict how much heat the HPWH could extract/store while minimizing any overheating situations…
I would think this could be stretched even further to have the HPWH (high in the house) hooked up to a fairly large storage tank for buffered heating during dark hours and whatnot.
Overheating could be easily minimized by exterior shades or by simply opening a window. Overheating in the summer… bad, Overheating in the winter… I could think of far more things to complain about.
Would love to hear everyone’s opinions on this.