What is the best option for replacing a tankless coil boiler? Should I replace it with the same system, a separate boiler and water heater or an indirect system?
It depends, but if you have more than two people in your household and you're use the boiler to heat your home through radiators, then your best bet is a properly sized high efficiency boiler with an indirect tank. That is the most energy efficient solution.
Dan Kartzman,
Powersmith Home Energy Solutions
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