Replacing Burnham 140,000 BTU Gas/Hotwater system
I'm thinking about replacing my Burnham 65W circa 1977 boiler with a newer
model. The boiler had a tankless heater which is deactivated and was originally oil fired later converted to gas.
I can't believe that the effeciency is of 60% because of the oil chamber and
the flue size. I would like some of good quality like a Burnham or Weil Mclain with about 85% effiency.
Can I repipe the system using M copper instead of the iron with 50/50 solder or do I need 95/5.
My local dealer recommended a Crown Boiler?Cabo2. But $2400 seem a little pricey.
Can I get rid of the flow controls? I have 2 circulator pumps.
Thanks for your help.