MOUNT INTAKE HOOD
Install a weather tight hood with a bird screen .
Cut a hole in the exterior wall that is large enough to fit 6" insulated flexible duct through with minimal compression of the insulation . Pull the duct
through the hole and attach the flex duct to the collar of the hood . Use good quality duct tape or a plastic zip-tie to secure the duct to the collar . Pull
the insulation and vapor barrier over the duct and tape it to the collar .
IMPORTANT:
The end of the insulation must be sealed to prevent condensation from forming inside the insulation. If a plastic zip-tie is used to
secure the insulation to the hood collar, also tape the end to seal it against condensation problems.
Press the hood against the outside wall and secure in place with screws; seal around the perimeter of the hood with caulk .
INSTALL DUCTWORK
Install 6" diameter flexible, insulated duct from the round inlet collar of the unit to the intake hood and from the oval outlet collar of the unit to the
HVAC system .
8140 installations:
Duct the outlet of the ventilator to the return side of the HVAC system (refer to
FIGURE 5
) .
8141 installations:
Duct the outlet of the ventilator to the supply side of the HVAC system . Discharge the air at a location where it will not be
directed, through a supply duct, to one small space, but will be distributed to multiple supply registers (refer to
FIGURE 6
) .
IMPORTANT:
The end of the insulation must be sealed to prevent condensation from forming inside the insulation. If a plastic zip-tie is used to
secure the insulation to the hood collar, also tape the end to seal it against condensation problems.
FRESH AIR VENTILATOR
GABLE END WALL, BAND JOIST, OR PORCH SOFFIT
FRESH AI
R
FRESH AIR
FRESH AIR INTAKE DUCT
FRESH AIR
INTAKE HOOD
WITH SCREEN
FRESH AIR
INTAKE HOOD
WITH SCREEN
RETURN
MIXING BOX
FURNACE/AIR
HANDLER
FILTER
AIR FLOW
VENTILATION CONTROLLER
FILTER
FURNACE/AIR HANDLER
AIR
FLOW
VENTILATION
CONTROLLER
FRESH AIR
VENTILATOR
FRESH AIR INTAKE DUCT
OUTSIDE
WALL
TYPICAL BASEMENT INSTALLATION
TYPICAL ATTIC INSTALLATION
FRESH AIR VENTILATOR
GABLE END WALL, BAND JOIST, OR PORCH SOFFIT
FRESH AI
R
FRESH AI
R
FRESH AIR INTAKE DUCT
FRESH AIR
INTAKE HOOD
WITH SCREEN
FRESH AIR
INTAKE HOOD
WITH SCREEN
FURNACE/AIR HANDLER
AIR FLOW
SUPPLY
SUPPLY
VENTILATION CONTROLLER
FURNACE/AIR HANDLER
AIR
FLOW
VENTILATION
CONTROLLER
FRESH AIR
VENTILATOR
FRESH AIR
INTAKE DUCT
OUTSIDE
WALL
TYPICAL BASEMENT INSTALLATION
TYPICAL ATTIC INSTALLATION
90-2060
90-2098
FIGURE 5
– MODEL 8140 DUCTING IN UPFLOW
AND HORIZONTAL HVAC SYSTEMS
FIGURE 6
– MODEL 8141 DUCTING IN UPFLOW
AND HORIZONTAL HVAC SYSTEMS
4
