Mr. Heater MHVFR20TB LP, MHVFB20TB LP, MHVFR30TB LP, MHVFB30TB LP unvented LP-gas room heater Operating Instructions and Owner’s Manual

The MHVFR20TB LP, MHVFB20TB LP, MHVFR30TB LP, and MHVFB30TB LP are unvented LP-gas room heaters that provide supplemental heat. These heaters are designed for use in a variety of settings, including homes, garages, and workshops. They feature a thermostat for temperature control, a blower for air circulation, and an oxygen depletion sensor (ODS) for safety.

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Mr. Heater Unvented LP-Gas Room Heater Manual | Manualzz

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Key features

  • Thermostatic control
  • Blower for air circulation
  • Oxygen depletion sensor (ODS)
  • Easy to install and operate
  • Safe and efficient
  • Supplemental heat
  • Various sizes available

Frequently asked questions

These heaters use LP-gas only. They are not convertible for use with any other type of gas.

There is an electronic manual ignitor. The system does require one AA battery to operate ignitor. Follow the instructions on pages 10-11 to light the pilot and main burner.

If the heater shuts off, it may need servicing. Make sure the gas supply is turned on, the control knob is in the correct position, the pilot flame is lit, and the ODS/pilot is not clogged. Other possible causes are listed on pages 14-15 in troubleshooting section.

Clean the unit every 2,500 hours of operation or every three months. Inspect burner and pilot for dust and dirt, blow air through the port/slots and holes in the burner. You can use compressed air no greater than 30 psig. Follow the instructions on page 12 for how to clean your heater.

This heater is intended for use as supplemental heat. Do not install this heater as your primary heat source. You may run your central heating system’s circulating blower while using the heater to circulate the heat throughout the house.
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