Natural gas to Propane change over help

brian6pac said

I converted a old Reznor 90,000 BTU a long time ago for my garage. It was natural gas and all I did was remove the control valve and install a propane regulator. The jets are smaller for propane and I couldn't get the jets any more so I soldered them shut and drilled them smaller. My first attempt the jets were to small and the flame was really short so I drilled them larger till the flame was about 1" to 1.5" tall and it worked great.

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LOL!! Been there done that. The difficulty going TO LP is that you have no way of rating the burner except by eyesight of the flame size, and in a ducted system, if you had taked temp rise readings, you could double check them. With nat. gas you can "clock the meter" to make certain you have the proper gas usage.

Manometer readings at the manifold are useless without knowing that you have the proper orifice sizes.