U31-10 Gas Insert | 1
U31 Gas Insert
Model
U31-NG10
U31-LP10
Fuel Type
Natural Gas
Propane
Minimum Supply Pressure
5” W.C. (1.25 kPa)
12” W.C. (2.99 kPa)
Manifold Pressure - High
3.5” W.C. (0.87 kPa)
10” W.C. (2.49 kPa)
Manifold Pressure - Low
1.6” W.C. (0.40 kPa)
6.4” W.C. (1.59 kPa)
Orifice Size -
Altitude 0-2000 ft.
#37 DMS
#52 DMS
Orifice Size -
Altitude 2000-4500 ft.
#40 DMS
#53 DMS
Minimum Input
Altitude 0-2000 ft. (0-610m)
20,600 BTU/h
(6.04kW)
22,000 BTU/h
(6.45 kW)
Minimum Input
Altitude 2000-4500 ft. (610-1372m)
19,200 BTU/h
(5.62 kW)
20,000 BTU/h
(5.86 kW)
Maximum Input
Altitude 0-2000 ft. (0-610m)
30,000 BTU/h
(8.79 kW)
28,000 BTU/h
(8.21 kW)
Maximum Input
Altitude 2000-4500 ft. (610-1372m)
27,200 BTU/h
(7.97 kW)
25,000 BTU/h
(7.33 kW)
Vent Sizing
4” B-Vent
4” B-Vent
Approved Venting Systems
Flex Vent Systems:
FPI AstroCap™ Flex Vent
UNIT DIMENSIONS WITH STANDARD FACEPLATE
UNIT DIMENSIONS WITH LOW PROFILE FACEPLATE
8-1/8
”
Low profile
Standard
Faceplate
8-1/8
”
Low profile
Standard
Faceplate
MINIMUM FIREPLACE DIMENSIONS
The minimum fireplace dimensions for the FPI gas fireplace insert are shown in the following diagrams:
