MHVFRD20NG
MHVFRD30NG
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY:
Read and follow all instructions. Place instructions
in a safe place for future reference. Do not allow anyone who has not read these
instructions to assemble, light, adjust or operate the heater.
www.mrheater.com
800-251-0001
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
Model # MHVFRD20NG
MHVFRD30NG
UNVENTED NATURAL GAS
FIRED ROOM HEATER
WARNING: If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
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Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
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WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
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Installation and service must be performed by a qualified installer, service agency or the gas supplier.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is in-
stalled. Provisions for adequate combustion and ventilation air must be provided. Refer to
Fresh Air for Combustion and Ventilation section on page 4 of this manual.
This appliance may be installed in an aftermarket permanently manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This appli-
ance is not convertible for use with any other gas.
