The square footage of my house, a log-sided home, is approximately 1700 square feet, but I have a high cathedral ceiling and one wall consists of 3 sliding patio doors, so that wall has no registers. I do have a ceiling fan, but it isn't effective if there is no warm air to push down. Thus far I've called the nice Tarm folks, and they are going to stop by to look at isolating the oil boiler, so I'm not using oil to heat the water passing through the wood boiler, which is what is happening; I've trying to find a reputable weatherization company in NH (Eversource is not an option) and I'm having a leaky patio door replaced. I am scrapping the metal blinds on my windows and am looking at cellular shades. And I'm learning to knit. I called the storage tank folks. I have an EPDM liner in my atmospheric and they concur that I shouldn't be heating this above 170 degrees (I am using the top most temperature reading since that is the highest temperature). They are thinking I have an emitter problem. Currently, I have slant fin emitters, so I am looking at getting something more efficient. I'm off to knit and earn a degree is thermodynamics.