6
4-in
4-in
4-in
4-in
4-in
5-in
5-in
4-in
4-in
5-in
5-in
6-in
5-in
∅,
93 cfm
4-in
∅,
47 cfm
6-in
∅,
160 cfm
5-in
∅,
86 cfm
5-in
∅,
67 cfm
5-in
∅,
62 cfm
4-in
∅,
24 cfm
4-in
∅,
46 cfm
4-in
∅,
37 cfm
5-in
∅,
74 cfm
6-in
∅,
160 cfm
A11198
Fig. 10 - Fully ducted system
Installing the ductwork and registers
Fully ducted system (see Fig. 4)
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in property damage.
Never install a stale air exhaust register in a closed room where
combustion device operates, such as a gas furnace, a gas water
heater or a fireplace.
!
WARNING
Stale air exhaust ductwork
S
Install the stale air exhaust registers where the contaminants are
produced: kitchen, living room, etc. Position the registers as far
from the stairway as possible and in such a way that the air
circulates in all the lived- in spaces in the house.
S
If a register is installed in the kitchen, it must be located at least 4
feet (1.2 m) from the range.
S
Install the registers 6 to 12 inches (152 to 305 mm) from the
ceiling on an interior wall OR install them in the ceiling.
S
If possible, measure the velocity of the air flowing through the
registers. If the velocity is higher than 400- ft/min (122 m/min),
then the register type is too small. Replace with a larger one.
Fresh air distribution ductwork
S
Install the fresh air distribution registers in bedrooms, dining
rooms, living room and basement.
S
Keep in mind that the fresh air registers must be located as far as
possible from the stale air registers.
S
Install the registers either in the ceiling or high on the walls with
air flow directed towards the ceiling. (The cooler air will then
cross the upper part of the room and mix with room air, before
descending to occupant’s level.)
S
If a register must be floor installed, direct the airflow up the wall.
Central Draw Point System (see Fig. 5)
Stale air exhaust ductwork
Same as for Fully Ducted System described above.
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in property damage.
When performing duct connections, always use approved tools
and materials. Respect all corresponding laws and safety
regulations. Please refer to your local building code.
!
WARNING
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When performing duct connections to the furnace supply duct,
this duct must be sized to support the additional airflow
produced by the unit. Also, the use of metal duct is highly
recommended.
CAUTION
!
Fresh air distribution ductwork
There are 2 methods for connecting the unit to the furnace/air
handler:
Method 1: Supply side connection
S
Cut an opening into the furnace supply duct at least 18- in (0.5
m) from the furnace/air handler.
S
Connect this opening to the
Fresh air distribution
port of the
unit (use
metal duct
, see Fig. 11).
