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Joehvac25 is correct about the min modulation for the Solo 110 on propane is about 25k BTU. The heat losses for zones 1, 2 and 3 are 32.7 kBTU, 25.4 kBTU and 16.9 kBTU respectively as calculated by...

Just found this page and I think it's exactly the problem I'm having.

http://www.comfort-calc.net/Dont_Oversize_Mod_Con_Boiler.html

Here is the heat loss that the installer provided for my...

Over the summer, I had a TT Solo 110 boiler installed in my home. The boiler uses propane for fuel and replaces an old oil boiler. My home has (3) zones of fin tube baseboard and DHW is produced...