Venting Instructions
Table Of Contents
- VENTING INSTRUCTIONS FOR UNIT HEATERS (MODEL UBX: STANDARD POWER VENT BLOWER TYPE AND MODEL UDX: STANDARD POWER VENT FAN TYPE)
- GENERAL INFORMATION
- INSTALLATION
- Instructions for Commercial/Industrial Installations (Model UBX or UDX, All Unit Sizes)
- Instructions for Residential Installations (Model UDX, Unit Sizes 030, 045, 060, 075, 100, 125)
- Instructions for Commercial/Industrial or Residential Installations (Model UDX, Unit Sizes 030, 045, 060, 075, Vertical Category I)
- APPENDIX A: INSTRUCTIONS FOR ATTACHING DOUBLE-WALL TYPE B VENT PIPE TO SINGLE-WALL PIPE
- APPENDIX B: INSTRUCTIONS FOR INSTALLING FLEX-L BRANDCATEGORY III VENT PIPE
- FIGURES
- Figure 1. Roof Slope and Pitch
- Figure 2. Horizontal Vent Terminal (Commercial/Industrial Installations)
- Figure 3. Vertical Vent Terminal (Commercial/Industrial Installations)
- Figure 4. Horizontal Vent Terminal (Residential Installations)
- Figure 5. Vertical Vent Terminal (Residential Installations)
- Figure B1. Reducer and Vent Cap
- TABLES
7
CP-UBX-UDX-VENT (03-21) 1034631-0
Figure 3. Vertical Vent Terminal (Commercial/Industrial Installations)
Instructions for Residential Installations (Model UDX, Unit Sizes 030, 045, 060, 075, 100, 125)
A Category III vent as defined by the National Fuel Gas Code Z223.1 or CAN/CSA B149.1 and B149.2 is required for
a residential installation of model UDX units. Some venting requirements will vary, however, depending on whether
the vent is horizontal or vertical. Install vent as follows:
1. Select vent pipe approved to UL standard 1738 for category III appliance for either horizontal or vertical vent run.
2. Determine vent pipe diameter and length:
a. Minimum vent length is 3 feet (1 meter).
b. Use only one diameter of vent pipe for installation (refer to Table 4).
3. Determine venter (flue) outlet diameter (refer to Venter (Flue) Outlet Diameter section).
4. Make all vent pipe joint connections in accordance with Vent System Sealing section.
5. Support all vent pipe runs in accordance with Vent System Support Requirements section.
6. Take appropriate steps to mitigate condensation in accordance with Condensation Mitigation section.
7. Terminate vent as follows:
a. Install UL standard 1738 approved category III vent pipe and terminate vent with option CC1 or CC21 vent
cap or Novavent #2NVTB4 vent cap.
b. Refer to instructions shown in Figure 4 and to Table 2 to install horizontal vent terminal.
Heaters w/Option CC1, CC21 or
Novavent #2NVTB4 vent cap.