Mechanical equipment, appliances, fireplaces, solid fuel-burning
appliances, cooking appliances and water heating appliances shall
be properly installed and maintained in a safe working condition,
and shall be capable of performing the intended function.
Fuel-burning equipment and appliances shall be connected to
an approved chimney or vent.
Exception: Fuel-burning equipment and appliances
that are labeled for unvented operation.
Required clearances to combustible materials shall be maintained.
Safety controls for fuel-burning equipment shall be maintained
in effective operation.
A supply of air for complete combustion of the fuel and for ventilation of the space containing the fuel- burning equipment
shall be provided for the fuel-burning equipment.
Devices intended to reduce fuel consumption by attachment to
a fuel-burning appliance, to the fuel supply line thereto, or to the
vent outlet or vent piping therefrom, shall not be installed unless labeled for such purpose and the installation is specifically approved.