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Condesing Pellet Boilers?
So I think I found a "perfect" boiler for my NH house. The Windhager FireWIN a.k.a. Baxi BioFlo. 30kBTUh is the right size. Problem is finding the nitty-gritty details. I get so sick of the advertising hyperboil. Yes, it is a wonderful unique design, but how the heck do I hook it up and control it?
They say up-to 95.7% efficiency. I infered that it modulates from the literature. 3.8kW to 9.1kW (13 - 31 kBTU/h) So is it really Condensing??? Can you achieve that kind of efficiency without condensation?
I read in the installation manual "the maximum setpoint achievable in normal heating operation" can be set between 60°C & 75°C (140° - 167°F). "the set temperature for external heating requirement" is set between 35° - 75°C (95° - 167°F). BUT the minimum boiler return temp is 50°C (130°F).
I think I sort of understand all that. Minimum Boiler temp to prevent condensate; Max Boiler Temp to protect the system. External Heat Limit for the load.
But I cannot find any information on how all that hooks together. There is no mention of ODR, Ext. Heat Sensor connections, or how to hook up a Circulator / mixing valve to the boiler.
Has anyone installed or use one of these type pellet boiler?
Building a house in NH