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oil fired Weil -Mclain or Buderus fhw or or Burnham Mega Steam?
My two pipe cast iron steam radiators can be used for a new fhw system with an outdoor reset control and a new Weil-Mclain UO-3 or Buderus G115WS/3 oil fired boiler. Or I can opt for a Burnham Megasteam. I want the most savings I can get on oil. I have 1900 sq. ft. to heat 400 of which is a first floor apartment with fhw baseboards off the steam boiler. I have heated successfully with steam for 30 years, but with the surge in oil prices and the inefficiency (60-65%) of my Timkin boiler, I have to upgrade.
There is no NGas here. After researching it seems as though with a modcon LP fired wall hung boiler I could face higher fuel and maintenance costs and might not find the right technical help in my area.
If I switch to fhw there are more up front costs to change 3 radiators to two pipe and to fix potentially leaking pipes and wall damage. If I thought the savings would be significantly greater over time to switch to fhw I would do it, even though the cost would be greater up front.
What questions should I be asking to make the right choice? Can someone steer me in the right direction?