MANUFACTURED OR MODULAR BUILDING DOWN DRAFT FURNACE CONNECTIONS:
EXISTING DOWNDRAFT FURNACE Existing Downdraft Furnace
8" BACK DRAFT DAMPER 8” Back Draft Damper
8 INCH DIAMETER, MINIMUM 8 Inch Diameter Minimum
10” to 8” Y-tee
10" TO 8" Y-TEE
HOT AIR DUCT FROM OUTDOOR FURNACE Hot Air Duct from Outdoor Furnace
8 INCH DIAMETER, MINIMUM 8 Inch Diameter Minimum
8 " BACK DRAFT DAMPER 8” Back Draft Damper
NO DUCT WORK INSTALLATION CONNECTION: A qualified professional should do the installation. Cold air return must be installed in all cases, even those without ductwork. When there is no duct system to connect to the hot air duct, keep in mind: • You must separate the hot air duct from the cold air return. Ideally, locate each at opposite ends of the building . If you don’t, the air will not flow evenly throughout the building . This method will work well on building built on concrete slabs and help create a good airflow. • In building s with a basement, you may run the hot air duct into the basement and pull the cold air return from the main floor, this will create a perfect air flow, since hot air rises. The cold air return must be connected, even if the building does not have ductwork. If you don’t connect the cold air return, the furnace will not be able to heat the building . See diagram below .
Hot Air
HOT AIR
COLD AIR Cold Air
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