DuraVent DuraFlex Stainless ProFoil: insulation for a wood liner without the required air gap
The DuraVent DuraFlex Stainless ProFoil is a half inch ceramic fiber insulation blanket with an aluminum foil face. It wraps around the liner before it enters the chimney. For wood burning, it allows listed installation against the masonry instead of leaving the required 1 inch air gap. It also helps the chimney passage warm faster, improving draft and reducing condensation. Gas, oil, and pellet liners need no insulation against masonry. DuraFlex Stainless is DuraVent’s flexible stainless steel liner for relining a masonry chimney that vents a wood, pellet, oil, or gas appliance.
Choose the width for your liner diameter: 22 inches for 3 to 5 1/2 inch liners, 24 for 6 inch, 29 for 7 inch, or 48 for 8 to 12 inch. Each roll is 25 feet long. Foil tape seals the seam, and ProMesh covers the blanket to protect it during lowering. Tape, mesh, and stainless band clamps are sold separately. A chimney professional should check clearance between the masonry and house framing. Want the blanket, tape, and mesh together? See the DuraVent DuraFlex Stainless ProMesh Insulation Kit. The DuraVent DuraFlex Stainless ProFoil ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 56RNS-PFB22X25 | 7RNS-PFB24X25 | 8RNS-PFB29X25 | 912RNS-PFB48X25
Applications
- DuraFlex Pro ultra flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
- DuraFlex SW smooth wall flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
- DuraFlex 316 flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliance. Applications include: fireplace inserts, furnaces, boilers, and water heaters. 316 is designed for use in harsher conditions, for more resistance to corrosion, such as coal.
- DuraFlex 304 flexible relining for masonry chimney. Use with gas, wood pellet, oil, or wood appliances. Applications include: fireplace inserts, furnaces, boilers, and water heaters.
Materials and Construction
DuraFlex Pro: Single-wall .005″ 316 stainless steel.
DuraFlex SW: Single-wall .005″ overlapped 316 stainless steel (totalling .010″). Overlapped to create smooth inner wall.
DuraFlex 316 & 304: Single-wall .005” 316 or 304 stainless steel.
Clearances
DuraFlex Pro: 0″ clearance for gas, oil, and pellet applications. 1″ clearance to masonry for wood-burning applications. Insulation is required for 0″ clearance to masonry for wood-burning.
DuraFlex SW: Clearances 0″ clearance for gas, oil, and pellet applications. ” clearance to masonry for wood-burning applications. Insulation is required for 0” clearance to masonry for wood-burning.
DuraFlex 316 & 304: 0″ clearance for gas, oil, and pellet applications. 1″ clearance to masonry for wood-burning applications. Insulation is required for 0″ clearance to masonry for wood-burning.
Diameters
DuraFlex Pro & SW: 3″ – 12″.
DuraFlex 316 & 304: 3″ – 8″.
Listings
DuraFlex Pro: Listed to UL 1777 and ULC S635 (MH45609).
DuraFlex SW: Listed to UL 1777 (MH45609).
DuraFlex 316 & 304: Listed to UL 1777 and ULC S635 (MH45609).