DuraVent 56RNS-PFB22X25 22" x 25' 1/2" Thick Pro Foil Insulator

- Item #: BCI1792591

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Ventinox Collection 22" x 25' 1/2" Thick Pro Foil Insulator

ProFoil is used as an insulator for stainless steel liners in masonry chimneys. It is UL listed insulation and is sized based on vent diameter. Required to insulate stainless steel liner to meet UL 1777 when proper clearances to chimney and framing are not available. 1” clearance from SS liner to interior wall of the masonry chimney and 1” clearance from the masonry to the house framing are required in order to meet UL 1777. If you only meet one of these clearances a ¼” wrap of insulation is required. If you do not have either of these clearances then a ½” wrap or 2 wraps of ¼” insulation are required (see Double Wrapping ¼” ProFoil chart below). If these two clearances are available then no insulation is needed. AluFoil Tape and ProMesh required.

Ventinox components are made from either 316SS (VFT) or superferritic stainless steel (VG). Components feature an integral locking band, avoiding the use of pop rivets. Liners and components provide a penetration free top to bottom connection. When venting solid fuel heaters, Ventinox VFT must be insulated with either TherMix or ProFoil blankets to meet UL 1777 requirements. For all other applications, insulation is highly recommended for increased efficiency and draft performance.


  • Inner Diameter: 5"
  • 1/2" Thickness
  • UL Listed
  • AluFoil Tape and ProMesh is Required

Looking for Simpson Dura-Vent? You found it! Simpson Dura-Vent has changed their name to DuraVent. DuraVent is a recognized technological leader in the venting industry. Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting. The company's research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro. Scientifically proven materials and unequalled engineering make DuraVent products not only the best choice, or safest choice, but the only choice for professional quality venting products.

Additional DuraVent Links

Our SKU: DuraVent 020710

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

DuraVent 56RNS-PFB22X25 Product Specifications

Configuration Insulation
Length 300
Manufacturer Warranty Lifetime Limited
Material Other Metals
Pipe Class Flexible Liner
Pipe Inside Diameter 5, 6
Pipe Shape Round
Thickness 0.5
UL Listed Yes
Vent Construction Single Wall
Width 22

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