Heater here: https://amzn.to/3jIG47Q (USA) | https://amzn.to/3HKGF0D (Canada)

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How to install a vent free gas heater: The 20,000 BTU vent free space heater from Dyna Glo can be made, on some models, to operate on both natural gas and liquid propane. However, this is an NG model only.

There is a gas fitting which I needed to buy separately to connect to my existing gas line.

This blue flame wall heater, is one of the best garage heaters natural gas. Installation and operation of the DynaGlo ventless heater is very easy, and it will prove to be a truly fantastic little heater.

Dyna Glo natural gas space heater review is here, consisting of this natural gas space heater ventless. A Dynaglo signature series vent free gas heater install.