UDX 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
9
CP-UBX-UDX-VENT (03-21) 1034631-0
Instructions for Commercial/Industrial or Residential Installations (Model UDX, Unit Sizes 030,
045, 060, 075, Vertical Category I)
On vent systems where at least 75% of the equivalent length of the vent run is vertical and the vent terminates at
least 5 feet above the vent outlet of the heater. All vertically vented heaters that are category I must be connected
to a chimney or vent complying with a recognized standard or a lined masonry (or concrete) chimney with a material
acceptable to the authority having jurisdiction. Venting into an unlined masonry chimney is not permitted. Install
vent as follows:
1. Select type of pipe for standard vertical (category I) vent. Double-wall vent pipe is recommended. Use single-wall
vent pipe if requirements of the National Fuel Gas Code are followed. All pipe must be UL listed for category I
appliances.
2. Determine vent pipe diameter and length for vertical vent. 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 listed category I terminal 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 to install vertical vent terminal.
c. Ensure that vent terminal is installed in accordance with Vent Terminal (Type of Pipe and Vent Cap)
Requirements section.