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Aug 25, 2023Aug 25, 2023

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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 with an asterisk are currently legal to sell and install in Massachusetts after May 15, 2020. MassDEP certified units listed below without an asterisk and legally installed by Massachusetts homeowners before May 15, 2020, 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.

Note: Models designated with an asterisk (*) are U.S. EPA Step 2-certified units.

Classic Edge 350 Classic Edge 360* Classic Edge 550 Classic Edge 560* Classic Edge 750 Classic Edge 760* Classic Edge 960* E-Classic 1450 E-Classic 3250 Maxim M255 P Maxim M255 PE*

Crown Royal Stove 7200E* Crown Royal Stove 7300E* Crown Royal Stove 7400E*

HeatMasterSS G100 HeatMasterSS G200 HeatMasterSS G400HeatmasterSS G4000* HeatMasterSS G7000* HeatMasterSS G10000*

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Note:Central Boiler Inc.Dectra Corp. Earth Manufacturing LLC Econoburn BoilersGreentech Manufacturing Inc.Hardy Manufacturing Co. Inc. Hawken Energy Inc.Heatmor Inc. Mahoning Outdoor FurnacesPiney Manufacturing Ltd. Polar Furnace Manufacturing Inc. Pro-Fab Industries Inc. SteelTech / HeatMaster WoodMaster Inc.