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Whirlpool UXT3030AYW0 Installation Instructions And Use & Care Manual page 6

30" (76.2 cm) and 36" (91.4 cm) range hoods
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For the most efficient and quiet operation:
Use no more than three 90 ° elbows.
Make sure there is a minimum of 24" (61 cm) of straight vent
between the elbows if more than 1 elbow is used.
Do not install 2 elbows together.
Use clamps or duct tape to seal all joints in the vent system.
The vent system must have a damper. If roof or wall cap has a
damper, do not use damper supplied with the range hood.
Use caulking to seal exterior wall or roof opening around the
cap.
Cold Weather
Installations
An additional back draft damper should be installed to minimize
backward cold air flow and a thermal break should be installed to
minimize conduction of outside temperatures
as part of the vent
system. The damper should be on the cold air side of the thermal
break.
The break should be as close as possible to where the vent
system enters the heated portion of the house.
Makeup Air
Local building codes may require the use of makeup air systems
when using ventilation systems greater than specified CFM of air
movement. The specified CFM varies from locale to locale.
Consult your HVAC professional for specific requirements in your
area.
Venting Methods
Vent system can terminate either through the roof or wall. Use
31/4 '' x 10" (8.3 x 25.4 cm) rectangular with a maximum vent
length of 35 ft (10.7 m) or 7" (17.8 cm) or larger round vent with a
maximum length of 50 ft (15.2 m) for vent system.
NOTE: Flexible vent is not recommended.
Flexible vent creates
both back pressure and air turbulence that greatly reduce
performance.
Roof Venting
Wall Venting
A
C
A. 7" (17.8 cm) round vent
through roof
(purchased separately).
31/4'' x 10" (8.3 x 25.4 cm)
rectangular
vent through the
roof for series UXT30, UXT42
and UXT52 (purchased
separately).
B. Roof cap
(purchased separately)
C. 18" (45.Tcm) min. to
24" (61.0 cm) max. above the
cooking surface.
A. 7" (17.8 cm) round ventout the
top and through the wall
(purchased separately).
31/4 '' x 10" (8.3 x 25.4 cm)
rectangular vent through the
wall or out the top for series
UXT30, UXT42 and UXT52
(purchased separately).
B. Wall cap
(purchased separately)
C. 18" (45. 7 cm) min. to
24" (61.0 cm) max. above the
cooking surface.
Calculating
Vent System
Length
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
7" (17.8 cm) Round Vent System
Vent Piece
Round
45 ° elbow
2.5 ft
(0.8 m)
90 ° elbow
5.0 ft
(1.5 m)
7" (17.8 cm) wall cap
0.0 ft
(o.o m)
31/4"x 10" (8.3 cm x 25.4 cm)
4.5 ft
to 7" (17.8 cm)
(1.4 m)
31/4"x 10" (8.3 cm x 25.4 cm)
5.0 ft
to 7" (17.8 cm) 90 ° elbow
(1.5 m)
Example vent system
7" (17.8 cm) round
Wall cap
6 ft (1.8 rn)
]_
90 ° e_bow
2 ft (0.6 m)
Maximum Recommended
Length
= 50 ft (15.2 m)
1 - 90 ° elbow
1 - wall cap
8 ft (2.4 m) straight
Length of 7" (17.8 cm) system
= 5.0 ft (1.5 m)
= 0.0 ft (0.0 m)
= 8.0 ft (2.4 m)
= 13.0 ft (3.9 m)
6

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