Do you have experience with the series 1?
Long story kind of short… I have a waste oil boiler, I want to parallel it with a gas boiler. Looking at used Weil-McLain Ultra units. Engineer calculated my boiler size to be 225,000. I can get a deal on an Ultra 300.
Will this work for me? Will it modulate low enough to be efficient? Can it be set to a max firing rate lower than 300000 btu?