Duraflex 3” and 4” Aluminum
DuraFlex 3" and 4" Aluminum
Applications
DuraFlex AL (DFAL) aluminum flexible relining for masonry chimney. Use with natural gas or liquid propane category I, 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
Single-wall .010" aluminum (2-ply of .005").
Clearances
0" clearance to masonry.
Diameters
3", 4", 5", 5 ½", 6", 7", and 8".
Listings
Listed to UL 1777 and ULC S635.
Typical Installations:
| Installation Key | |
|---|---|
| 1 | DuraCap |
| 2 | Storm Collar |
| 3 | Roof Flashing |
| 4 | High-Wind Cap |
| 5 | Round Pipe |
| 6 | Elbow |
| 7 | Tee |
| 8 | Tee Cap |
| 9 | Increaser Tee |
| 10 | Female Flex Adapter |
| 11 | Male Adapter |
| 12 | Double-Wall Wye |
| 13 | Pipe Collar |
| 14 | Increaser |
| 15 | Draft Hood Connector |
| 16 | Square Firestop Support |
| 17 | Oval Pipe |
| 18 | Oval to Round Adapter |
| 19 | Oval Tee |
| 20 | Oval Tee Cap |
| 21 | Oval Tee Support |
| 22 | Oval Firestop Spacer |
| 23 | DuraConnect II |
| 24 | DuraFlex AL Length |
| 25 | DuraFlex Motar Sleeve |
| 26 | DuraFlex AL Coupling |
How Size and Height Affect Stove Performance
- The amount of heat the vent gases lose 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 Pitch | Feet | Meters |
| Flat to 7/12 | 1 | 0.30 |
| Over 7/12 to 8/12 | 1.5 | 0.46 |
| Over 8/12 to 9/12 | 2 | 0.61 |
| Over 9/12 to 10/12 | 2.5 | 0.76 |
| Over 10/12 to 11/12 | 3.25 | 0.99 |
| Over 11/12 to 12/12 | 4 | 1.22 |
| Over 12/12 to 14/12 | 5 | 1.52 |
| Over 14/12 to 16/12 | 6 | 1.83 |
| Over 16/12 to 18/12 | 7 | 2.13 |
| Over 18/12 to 20/12 | 7.5 | 2.29 |
| Over 20/12 to 21/12 | 8 | 2.44 |
Gas Vent Specification Chart
| Item | Clearances | Maximum Height | Outer Tube Ø | Materials | Locking Device | UL Listing | ULC Listing |
|---|---|---|---|---|---|---|---|
 3" Aluminum Flex CouplerDuraFlex Al Coupling..  3" Cap Duraflex AlumniumDuraFlex AL Cap.. 3" Female Flex Adapter Duraflex AlumniumFemale Flex Adapter.. 3" Tee w/Cap Duraflex AlumniumDuraFlex AL Tee.. 3" Top Plate Duraflex AlumniumDuraFlex Top Plate.. 3" Universal B-Vent - Flex Adapter3" Universal B-Vent - Flex Adapter..  3" X 25' Aluminum Liner (Duravent)DuraFlex AL Length - 3" x 25'.. 3" X 25' Aluminum Liner KIT (Duravent)DuraFlex AL Kit - 3" x 25' (includes: DuraFlex AL .. 3" X 35' Aluminum Liner (Duravent)DuraFlex AL Length - 3" x 35'.. 3" X 35' Aluminum Liner KIT (Duravent)DuraFlex AL Kit - 3" x 35' (includes: DuraFlex AL .. 3" X 50' Aluminum Liner (Duravent)DuraFlex AL Length - 3" x 50'.. 4" Aluminum Flex CouplerDuraFlex AL Coupling.. 4" Cap Duraflex AlumniumDuraFlex AL Cap.. 4" Female Flex Adapter Duraflex AlumniumFemale Flex Adapter.. 4" Tee w/Cap Duraflex AlumniumDuraFlex AL Tee.. |