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I-RX-RG-RPV (09-19) PN1027501R0
Table 1. Model Applicability
Vent Model CFM Thermal Efficiency
Gravity
RG
Standard
78%
RX
HRG
High
HRX
CRG
Standard
80%
CRX
HCRG
High
HCRX
Power
RPV Standard
HRP
High
HRPV
GENERAL INFORMATION—CONTINUED
Applicability
The instructions in this manual apply to the outdoor duct furnace models listed in Table 1.
Installation Codes
The outdoor duct furnaces covered in this manual are design-certified by the Canadian Standards Association to
ANSI 283.8 and CAN/CGA 2.6 for use with either natural or propane gas. The gas type for which the furnace is
equipped and the correct firing rate are shown on the rating plate attached to the unit. Electrical characteristics are
also shown on the unit rating plate.
These units must be installed in accordance with local building codes. In the United States, the unit must be installed—in
the absence of local codes—in accordance with the National Fuel Gas Code (latest edition). A Canadian installation
must be in accordance with the CAN/CGA B149.1 and B149.2 Installation Code for Gas Burning Appliances and
Equipment. These codes are available from CSA Infomation Services (1-800-463-6727). Local authorities having
jurisdiction should be consulted before installation is made to verify local codes and installation procedure requirements.
Clearances
Clearance (refer to Table 2) to combustibles is defined as the minimum distance from the heater to a surface or object
so as to ensure that a surface temperature of 90°F above the surrounding ambient temperature is not exceeded.
Clearance is also required at the sides of the furnace for safety, for combustion air, and for servicing the unit.
Dimensions
NOTE:
• Dimensions for model series RG are shown in Figure 1 and listed in Table 3.
• Dimensions for model series RPV are shown in Figure 2 and listed in Table 4.
• Dimensions for model series RX are shown in Figure 3 and listed in Table 5.
Table 2. Clearances
Model Series
Unit Surface
Top
Side Bottom
Control*
Non-Control To Combustibles
To Non-
Combustibles
Required Clearance (Inches (mm))
RG
36 (914) 6 (152)
0 (0)
RX and RPV 3 (76) 0 (0)
RG and RX 30-foot (9-meter) radius from center of vent cap to obstruction such as wall, parapet, or cupola
*Clearance listed plus width of furnace.
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