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wasting energy - underutilized boiler?
I live in a 3 story, 3000 sqft house built in the 1930s. We have steam heat, which provides uneven heat amongst the 2nd and 3rd floor bedrooms. We've had numerous steam experts take a look over the years, and short of opening walls to examine the pitch of the pipes, there's not much else we can do to improve the situation.
We are currently doing a renovation of the 3rd floor, and have decided to put a hydronic coil in the air handler (from central air cooling) and heat the attic with forced air. To do this, we would require a 75000 BTU water boiler. We are toying with the idea of converting the entire house to forced air, but are afraid to do so until we live with it in the attic and make sure it's what we want. So - it would not be much more money to invest in a much larger (200000 BTU?) boiler right now - and that would be able to service the entire house should we choose to convert. But, we are worried that it will be a terrible waste of energy to use the larger boiler if we choose to use forced air for the third floor alone. We are hoping that someone here can speak knowledgeably about that concern and help us make a good decision!
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