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Q:what are the dangers of vent free natural gas heater .and its is legal here in mass state.
A:With reference to your inquiry on the Mr. Heater Vent Free 20,000 BTU Blue Flame, Natural Gas Heater - Part No. MRHF255682, the only danger with any Vent free gas heater is exposure to a low level of Carbon monoxide (CO). However you can overcome this CO threat by having a small exhaust in the room (for ex - opening one window). For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.
Q:can you use with natual gas and propane? do you have to change or add a part to do so?
A:With reference to this Mr. Heater Vent Free 20,000 BTU Blue Flame, Natural Gas Heater- part# MRHF255682, Never connect heater directly to the Propane supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and Propane/LP supply.The installer must supply an external regulator.The external regulator will reduce the incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure heater regulator damage could occur. Install external regulator with the vent pointing down. Pointing the vent down protects it from freezing rain or sleet. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.