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// CODE SNIPPET

802.6.3.2 Multistory Venting System

Uniform Mechanical Code 2018 of Nevada > 8 Chimneys and Vents > 802.0 Venting of Appliances > 802.6 Gas Vents > 802.6.3 Gas Vents Serving Appliances on More Than One Floor > 802.6.3.2 Multistory Venting System
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The size of the connectors and common segments of multistory venting systems for appliances listed for use with a Type B double-wall gas vent shall be in accordance with Table 803.2(1), provided all of the following apply:
  1. The available total height (H) for each segment of a multistory venting system is the vertical distance between the level of the highest draft hood outlet or flue collar on that floor and the centerline of the next highest interconnection tee.
  2. The size of the connector for a segment is determined from the appliance's gas input rate and available connector rise, and shall not be smaller than the draft hood outlet or flue collar size.
  3. The size of the common vertical vent segment, and of the interconnection tee at the base of that segment, is based on the total appliance's gas input rate entering that segment and its available total height. [NFPA 54:12.7.4.3]
 
FIGURE 802.6.3.2
USE OF MANIFOLDED COMMON VENT CONNECTOR
[NFPA 54: FIGURE F.1(k)]
 

Related Code Sections


509.6.3.2 Water Heaters, Multistory Venting System
The size of the connectors and common segments of multistory venting systems for appliances listed for use with a Type B double-wall gas vent shall ...
Uniform Plumbing Code 2018 of Nevada > 5 Water Heaters > 509.0 Venting of Appliances > 509.6 Gas Vents > 509.6.3 Gas Vents Serving Appliances on More Than One Floor > 509.6.3.2 Multistory Venting System
802.6.3.2 Chimneys and Vents, Multistory Venting System
The size of the connectors and common segments of multistory venting systems for appliances listed for use with a Type B double-wall gas vent shall ...
Uniform Mechanical Code 2018 of Nevada > 8 Chimneys and Vents > 802.0 Venting of Appliances > 802.6 Gas Vents > 802.6.3 Gas Vents Serving Appliances on More Than One Floor > 802.6.3.2 Multistory Venting System
803.2.16 Chimneys and Vents, Offsets in Multistory Installations
Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply ...
Uniform Mechanical Code 2018 of Nevada > 8 Chimneys and Vents > 803.0 Sizing of Category I Venting Systems > 803.2 Multiple Appliance Vent Table 803.2(1) Through Table 803.2(9) > 803.2.16 Offsets in Multistory Installations
510.2.16 Water Heaters, Offsets in Multistory Installations
Offsets in multistory common vent systems shall be limited to a single offset in each system, and systems with an offset shall comply ...
Uniform Plumbing Code 2018 of Nevada > 5 Water Heaters > 510.0 Sizing of Category I Venting Systems > 510.2 Multiple Appliance Vent Table 510.2(1) Through Table 510.2(9) > 510.2.16 Offsets in Multistory Installations
907.1.2 Installation of Specific Appliances, Vented Wall Furnaces
or the top story of multistory buildings. Vented wall furnaces connected to a Type B-W gas vent system listed for installation in multistory buildings shall ...
Uniform Mechanical Code 2018 of Nevada > 9 Installation of Specific Appliances > 907.0 Wall Furnaces > 907.1 Installation > 907.1.2 Vented Wall Furnaces
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