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6
Room size: Larger than 700 ft
3
(e.g. 7' x 10' x 10').
Requirements: No additional ventilation needed.
Heater: Not Ducted
24”
12” Max
Air exhaust
Door
.75”
Room size: Any size room
Requirements: No additional ventilation needed.
Heater: Ducted with inlet AND outlet duct
Room size: Any size room
Requirements: Air gap under door equal to 18 in
2
(0.75” clearance)
Heater: Ducted with inlet OR outlet duct
Room size: Smaller than 700 ft
3
(e.g. 7' x 10' x 10').
Requirements: Full louvered door OR two louvers
top and bottom. See below.
Heater: Not Ducted
24”
.75”
Room: Small Closet
Requirements: * Air gap under door equal to 18 in
2
(0.75” clearance).
* Louver must be located the same height on door as
the air exhaust on heater.
* Heater air exhaust must be positioned towards louver
within one foot of door.
Heater: Not ducted
Room size: Larger than 700 ft
3
(e.g. 7' x 10' x 10').
Requirements: No additional ventilation needed.
Heater: Not Ducted
24”
12” Max
Air exhaust
Door
.75”
Room size: Any size room
Requirements: No additional ventilation needed.
Heater: Ducted with inlet AND outlet duct
Room size: Any size room
Requirements: Air gap under door equal to 18 in
2
(0.75” clearance)
Heater: Ducted with inlet OR outlet duct
Room size: Smaller than 700 ft
3
(e.g. 7' x 10' x 10').
Requirements: Full louvered door OR two louvers
top and bottom. See below.
Heater: Not Ducted
24”
.75”
Room: Small Closet
Requirements: * Air gap under door equal to 18 in
2
(0.75” clearance).
* Louver must be located the same height on door as
the air exhaust on heater.
* Heater air exhaust must be positioned towards louver
within one foot of door.
Heater: Not ducted
Installing the water heater
NOTICE: If air
temperature in
installed location
drops more than
15°F (8°C) during
heating, air circulation
is insufficient for
efficient operation.
Utilize ducting to
direct cold exhaust air
to another location.
Locations that provide optimal efficiency
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