Ductwork
Supply
NOTE: Always perform a proper heat loss calculation before specifying the furnace size.
This ensures that the furnace is sized to adequately and economically heat the building while
also providing the correct airflow for your application.
Central cooling and heating equipment is only as efficient as the duct system that carries
the cooled or heated air. To maintain efficiency, comfort and good indoor air quality, it is
important to have the proper balance between the air being supplied to each room and
the air returning to the cooling and heating equipment.
AIR CIRCULATED BY THE FURNACE TO AREAS OUTSIDE THE SPACE CONTAINING THE
FURNACE, THE RETURN AIR SHALL ALSO BE HANDLED BY DUCT(S) SEALED TO THE
FURNACE CASING AND TERMINATING OUTSIDE THE SPACE CONTAINING THE FURNACE.
WHEN THIS FURNACE IS INSTALLED IN A RESIDENTIAL GARAGE, IT MUST BE INSTALLED
SO THE BURNERS AND IGNITION SOURCE ARE LOCATED NO LESS THAN 18 INCHES ABOVE
THE FLOOR. THIS IS TO REDUCE THE RISK OF IGNITING FLAMMABLE VAPORS WHICH MAY
BE PRESENT IN A GARAGE. ALSO, THE FURNACE MUST BE LOCATED OR PROTECTED TO
AVOID PHYSICAL DAMAGE BY VEHICLES. FAILURE TO FOLLOW THESE WARNINGS CAN
CAUSE A FIRE OR EXPLOSION, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR
DEATH.
DUCT LEAKS CAN CREATE AN UNBALANCED SYSTEM AND DRAW POLLUTANTS SUCH AS
DIRT, DUST, FUMES AND ODORS INTO THE HOME CAUSING PROPERTY DAMAGE. FUMES
AND ODORS FROM TOXIC, VOLATILE OR FLAMMABLE CHEMICALS, AS WELL AS AUTOMO-
BILE EXHAUST AND CARBON MONOXIDE (CO), CAN BE DRAWN INTO THE LIVING SPACE
THROUGH LEAKING DUCTS AND UNBALANCED DUCT SYSTEMS CAUSING PERSONAL
INJURY OR DEATH DUCTWORK IS LOCATED IN GARAGES OR OFF-GARAGE STORAGE
AREAS - ALL JOINTS, SEAMS, AND OPENINGS IN THE EQUIPMENT AND DUCT MUST BE
SEALED TO LIMIT THE MIGRATION OF TOXIC FUMES AND ODORS INCLUDING CARBON
MONOXIDE FROM MIGRATING INTO THE LIVING SPACE. IF AIR-MOVING EQUIPMENT OR
DUCTWORK IS LOCATED IN SPACES CONTAINING FUEL BURNING APPLIANCES SUCH AS
WATER HEATERS OR BOILERS - ALL JOINTS, SEAMS, AND OPENINGS IN THE EQUIPMENT
AND DUCT MUST ALSO BE SEALED TO PREVENT DEPRESSURIZATION OF THE SPACE AND
POSSIBLE MIGRA
TION
OF COMBUSTION BYPRODUCTS INCLUDING CARBON MONOXIDE
INTO THE LIVING SPACE.
Installation/Instruction Manual for Architects & Engineers
20.
