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U.S. Environmental Protection Agency (EPA) regulation and certification of new residential outdoor hydronic heaters changed on January 1, 2016.
As a result, only those MassDEP-certified units listed below are currently legal to sell and install in Massachusetts. Units not listed below but certified by MassDEP and legally installed by Massachusetts homeowners before the end of 2015 are unaffected and may continue operating.
The MassDEP outdoor hydronic heater regulation at 310 CMR 7.26(50) – including manufacturer compliance certification, stack height, and installation setback requirements – remains in full effect until further notice.
Classic Edge 350
Classic Edge 550
Classic Edge 750
Maxim M255 P
Maxim M255 PE