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Gas Inserts
U35 Gas Insert
Model U35-NG1 U35-LP1
Fuel Type Natural Gas Propane
Minimum Supply Pressure 5” W.C. (1.25 kPa) 12” W.C. (2.99 kPa)
Manifold Pressure - High 3.8” W.C. (0.95 kPa) 11” W.C. (2.74 kPa)
Manifold Pressure - Low 1.1” W.C. (0.27 kPa) 2.9” W.C. (0.72 kPa)
Orifi ce Size -Altitude 0-4500 ft. #33 DMS #50 DMS
Minimum Input
Altitude 0-4500 ft. (0-1372m)
Maximum Input
Altitude 0-4500 ft. (0-1372m)
Vent Sizing 3” Co-linear 3” Co-linear
Approved Venting Systems
Flex Vent Systems: FPI AstroCap™ Flex Vent
17,500 BTU/h
(5.13 kW)
35,000 BTU/h
(10.26 kW)
A
17,500 BTU/h
(5.13 kW)
35,000 BTU/h
(10.26 kW)
U35 Gas Insert
Gas Inserts
B
C
F
H
D
I
E
Dimension Description U35
A Faceplate Width 45-9/16” (1157mm)
B Faceplate Height 31-1/8” (791mm)
C Unit Width 32-1/4” (819mm)
D Unit Height 24” (610mm)
E Unit Depth 16-1/8” (410mm)
F Faceplate to Vent Centerline 9-7/8” (251mm)
G Faceplate Depth 1-3/8” (35mm)
H Height to Vent Collar 25 1/2” (648mm)
I Optional or Standard Front Depth 3-3/4” (95mm)
Minimum Fireplace Dimensions
The minimum fi replace dimensions for the FPI gas fi replace insert are
shown in the following diagrams:
M
J
Dimension Description
J Height 25” (635mm) 26-3/4” (679mm)
K Width 32-1/4” (819mm) 34-1/2” (876mm)
L Depth 17” (432mm) 18” (457mm)
M Max. Lintel Bar Depth 9” (229mm) 10” (254mm)
N Rear Width 25” (635mm) 25” (635mm)
L
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K
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N
Contour
Faceplate
Molded
Faceplate /
Palace Font
129August 2008 Product Specifi cations Book
Clearances
Gas Inserts
U35 Gas Insert
Combustible Mantels
Unless otherwise stated the clearances listed below are Minimum
distances to combustible materials. Please Note: A major cause
of chimney related fi res is due to a failure to maintain required
clearances (air space) to combustible materials. It is of the greatest
importance that this fi replace and vent system be installed only in
accordance with these instructions.
Clearances to Combustibles
Dimension Description U35
A From Unit to Sides 10” (254mm)
Gas Inserts
B From Unit to Ceiling 34” (864mm)
D From Standard Surround to Sides 1-15/16” (49mm)
E From Standard Surround to Ceiling 28-⅞” (733mm)
G Maximum Mantel Depth 12” (305mm)
H Minimum Alcove Width 48” (1219mm)
I Maximum Alcove Depth 36” (914mm)
* No Hearth Required
B
E
Because of the extreme heat this fi replace emits, the mantel
clearances are critical. Combustible mantel clearances from top of
the louvers are shown in the diagram below. Mantel may be installed
anywhere in the shaded area or higher.
G
I
Bay & Flush Front Mantel Clearances
A
H
D
Kensington Front Mantel Clearances
Note: A non-combustible mantel may be installed at a lower
height.
Note: Ensure the paint that is used on the mantel and the facing
is “heat resistant” or the paint may discolour.
130 August 2008 Product Specifi cations Book
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