DuraVent

DuraVent’s innovative system for a lock-tight connection for Type B Gas Vent called DuraLock. See the alignment indicators meet; feel the ends grasp together; hear the snap as the connection firmly locks into place.

DuraVent Type B Gas Vent is designed to meet the rugged demands of the job site. The inner wall is recessed to eliminate damage in handling.

Type B Gas Vent has been engineered to heat up rapidly. It remains hot during the operation of the appliance with minimal condensation in the appliance and vent system. Pipe lengths are available in multiple lengths, 6 to 60 inches, with a full complement of adjustable and rigid fittings.

Type B gas vents are not suitable for use with wood-burning or coal applications, industrial ovens, exhaust ranges and hoods, grease or pollution ducting, or as free-standing exhaust vents for high-temperature applications. 

Applications
DuraVent’s Type B Gas Vent system. Use with natural gas or liquid propane category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.

Materials and Construction
Round Type B Gas Vent 10″ – 12″: Aluminum .016″ inner wall, galvanized .021″ outer wall. 10″- 12″ diameters feature twist-lock fittings, screws required for 14″ and larger diameters.

Clearances
1″ clearance to combustibles in single and multi-family dwellings.

Diameters
10″- 12″ Round Diameter.

Listings
UL Listed to UL 441 and UL 1777 (MH6357). ULC Listed to ULC S605 (CMH1276 & CMH1407).

Refer to our Typical Venting Installation drawings to select the appropriate component parts for your installation.

More Typical Installations:

Installation Key
1DuraCap
2Storm Collar
3Roof Flashing
4High-Wind Cap
5Round Pipe
6Elbow
7Tee
8Tee Cap
9Increaser Tee
10Female Flex Adapter
11Male Adapter
12Double-Wall Wye
13Pipe Collar
14Increaser
15Draft Hood Connector
16Square Firestop Support
17Oval Pipe
18Oval to Round Adapter
19Oval Tee
20Oval Tee Cap
21Oval Tee Support
22Oval Firestop Spacer
23DuraConnect II
24DuraFlex AL Length
25DuraFlex Motar Sleeve
26DuraFlex AL Coupling
 

How Size and Height Affect Stove Performance

  • The amount of heat the vent gases lo0se as they flow determines how much condensation will occur and how strong the draft will be. To control the heat loses, proper selection of venting materials is of vital importance.
  • Double-wall Type B Gas Vent, with an aluminum inner wall and a galvanized steel outer wall, has proven to be the ideal choice in venting materials.

Vent Termination Chart
Using listed Type B Gas Vent caps may terminate in accordance with this table.

Minimum height
Roof PitchFeetMeters
Flat to 7/1210.30
Over 7/12 to 8/121.50.46
Over 8/12 to 9/1220.61
Over 9/12 to 10/122.50.76
Over 10/12 to 11/123.250.99
Over 11/12 to 12/1241.22
Over 12/12 to 14/1251.52
Over 14/12 to 16/1261.83
Over 16/12 to 18/1272.13
Over 18/12 to 20/127.52.29
Over 20/12 to 21/1282.44

Gas Vent Specification Chart

ItemClearancesMaximum HeightOuter Tube ØMaterialsLocking DeviceUL ListingULC Listing

Round 10″ to 16″

See note 1

1 inch to combustibles100 feet1″ larger than IDInner – .016″ Aluminum Outer – .021″ GalvanizedTwistLock ScrewsMH6357CMH1276

Note:

  1. Maximum height varies with equipment over 50′, for taller applications refer to SDV sizing handbook (L202).