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DYNAVENT
WINDOW WALL FURNACE
DIRECT-VENT NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
SOLID STATE IGNITION
50 60 70 80 90
50 60 70 80 90
DNV25NB
DNV40NB
25,000 and 40,000 BTU/Hr “B” Model Furnaces
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
FOR YOUR SAFETY
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.
WARNING: Improper in-
stallation, adjustment,
alteration, service, or
maintenance can cause
injury or property dam-
age. Refer to this manual
for correct installation
and operational proce-
dures. For assistance or
additional information
consult a qualified in-
staller, service agency,
or the gas supplier.
WARNING: If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Installation and ser-
vice must be performed
by a qualified installer,
service agency, or the
gas supplier.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (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
appliance is not convertible for use with other gases.