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Regency U41-3 ULTIMATE Gas Fireplace Insert
Burner Inlet Orifice Sizes:
Natural Gas
Burner #33
Max. Input Rating - Natural Gas 34,000 btu/h
Min. Input Rating - Natural Gas 18,000 btu/h
Output Capacity with blower Off
Natural Gas 24,786
Max. Output Capacity with blower On
Natural Gas 26,146
System Data
For 0 to 2000 feet altitude
Burner Inlet Orifice Sizes:
Natural Gas Propane
Burner #32 #50
*Above 2000 ft. see National Code Orifice Chart.
Max. Input - Natural Gas/Propane 38,000 btu/h
Min. Input - Natural Gas/Propane 20,000 btu/h
Min. Output Capacity with blower Off
Natural Gas 27,550 btu/h
Propane 27,778 btu/h
Max. Output Capacity with blower On
Natural Gas 29,184 btu/h
Propane 29,260 btu/h
Supply Pressure: Natural Gas min. 5" w.c.
Propane min. 12" w.c.
Manifold Pressure
Natural Gas 3.8" +/- 0.2" w.c.
Propane 11" +/- 0.2" w.c.
System Data - HIGH ELEVATION
For 2,000 - 4,500 feet altitude
HIGH ELEVATION
This unit is approved in Canada for altitude 2000 ft. to 4500 ft. (CAN/CGA-
2.17-M91) with the orifice kit Part # 611-975. For Natural Gas installations
above 4500 ft. follow current CAN/CGA-B149.1.
In U.S.A., for installations above 2000 ft. refer to current ANSI Z223.1 Sc8-
8.1.2a appendix F, for resizing orifice.
INSTALLATION
Combustible Mantel Clearances
Depth (Mx) 5-1/2" 6" 6-1/2" 7" 7-1/2" 8" 8-1/2" 9" 9-1/2"
Clearance (My) 11" 11-3/8" 11-3/4" 12-1/4" 12-1/2" 12-5/8" 12-3/4" 12-7/8" 13"
Non-combustible Hearth Extension
Height (Hy) 0" 5/8" 1-1/4" 1-7/8" 2-3/8" 2-3/4" 3-1/8" 3-1/2" 3-3/4" 4"
Depth (Hx) 25" 24" 23" 22" 21" 20" 19" 18" 17" 16"
Note: A non-combustible mantel may be installed at a lower height if the framing is
made of metal studs covered with a non-combustible board.
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