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Oil-to-gas conversion for steam system
We are looking to overhaul our "antique" heating system and would appreciate expert guidance.
The home has no air conditioning currently, and maintains an oil-fueled ~20-year old Dunkirk steam boiler for heating. The home was built in 1760, and maintains 1919 and 1940 extensions. The 1940 extension (kitchen, laundry room, living area, and garage) will be completely renovated. The 2-pipe steam system services the entire home (3,300 sq. ft.) currently, and we are looking to convert from an oil to a gas boiler, keeping the existing piping (converting to water raises concerns of leaking if system pressure increases), and decommissioning the oil boiler and oil water heater. We’d also like to add A/C (HV or forced air) to the first floor as the ceiling below is open, making the job easier. The second floor has no attic or ceiling space, making that job a challenge.
1. Is this approach sound?
2. If so, what high-quality, high-efficiency gas boilers exist? We are considering systems like. Burnham IN7S-EI-EZ-NG, Peerless 63-06-SPRK, or Slant-Fin’s Galaxy GXHA and an opinion on these or other systems would help.
3. Is there a way to take advantage of the heating power of the steam boiler to heat hot water or should we go with a direct heating tank-less system?
4. Any suggestions for a HV A/C system or are Spacepak and Unico the only players in this space?