This furnace may be used as a construction site heater ONLY if all of the following conditions are met:
 

• The vent system is permanently installed per these installation instructions.
 

• A room thermostat is used to control the furnace. Fixed jumpers that provide continuous heating CANNOT be used and can cause long term equipment damage. Bimetal thermostats, or any thermostat affected by vibration, must not be used during construction.
 

• Return air ducts are provided and sealed to the furnace.
 

• A return air temperature range between 60ºF (16ºC) and 80ºF (27ºC) is maintained.
 

• MERV 11 air filter(s) are installed in the system and inspected daily and replaced as needed during construction and upon completion of construction.
 

• The input rate and temperature rise are set per the furnace rating plate.
 

• The furnace must be installed as a two pipe system, using 100% outside air for combustion during construction.
 

• The furnace heat exchanger, components, duct system, air filters and evaporator coils are thoroughly cleaned following final construction clean up by a qualified person.
 

• All furnace operating conditions (including ignition, input rate, temperature rise and venting) are verified according to these installation instructions.
 

• Furnace doors must be in place on the furnace while the furnace is operating in any mode.
 

• Damage or repairs due to failure to comply with these requirements are not covered under the warranty.