Oils, Fluids and Sealer› Oils, Fluids and Additives
Mr. Heater
BIG MAXX 300000 BTU NATURAL GAS UNIT HEATER WITH PROPANE CONVERSION KIT
SKU: M023 F263000
Beginner — under 30 min
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Mr. Heater |
| Part Number | M023 F263000 |
Videos
Mr. Heater Vent Free Blue Flame Heater 30,000 BTU - Long-term review and overview of modifications
I INSTALLED A MR. HEATER IN MY GARAGE AND THIS HAPPENED
Mr. Heater Blue Flame Ventless Heater - 4 Year Review and Q&A
Installing a Mr. Heater Blue Flame in our Garage (Natural Gas)
Mr. Heater F299741 30,000 BTU Natural Gas Blue Flame Vent Free Garage Heater Basic Install Test
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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