Jadnashua
Retired Defense Industry Engineer xxx
I'm going to have my boiler replaced and a new indirect HW tank installed. In my bathroom remodel, I had an air tub installed (takes about 45 gallons if you fill it up max, don't do that though), and the existing Trianco Heatmaker II just doesn't cut it. I've looked at the first hour draw, and even a very small tank provides over 100 gallons. Note in the winter, my incoming water has approached 34-35 degrees after a really cold spell in the winter, so that would derate them some.
The tub supply line is 1/2", so that limits somewhat the tub fill rate, if that makes a difference.
I was thinking about a SuperStor, and the Weil-McLain Ultra 80. My heat loading only requires about 30Kbtu, and the way the Ultra boiler works is if the HW is on, it disables the heat circulator, so all the heat is available for the reheating of the water.
What size tank do you suggest, and, while I don't need it for heat, since the Ultra has a variable rate boiler, I probably might bump up to the next size and not impact the overall efficiency much, would that be a good idea, too?
The tub supply line is 1/2", so that limits somewhat the tub fill rate, if that makes a difference.
I was thinking about a SuperStor, and the Weil-McLain Ultra 80. My heat loading only requires about 30Kbtu, and the way the Ultra boiler works is if the HW is on, it disables the heat circulator, so all the heat is available for the reheating of the water.
What size tank do you suggest, and, while I don't need it for heat, since the Ultra has a variable rate boiler, I probably might bump up to the next size and not impact the overall efficiency much, would that be a good idea, too?