Item # bci2477362

DuraVent Ventinox Flexible Liner Chimney Relining - Single Wall - 29" x 25' - 1/2" Thick Pro Foil Insulator

Model: 8RNS-PFB29X25

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Product Overview

Ventinox Collection 29" 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: 8"
  • 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.

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

Manufacturer Resources

Dimensions and Measurements

Inner Pipe Gauge
300 in.
Outer Pipe Gauge
Pipe Inside Diameter
8 in.
0.5 in.
29 in.

Characteristics and Features

Inner Pipe Material
316Ti Stainless Steel
Outer Pipe Material
316 Stainless Steel
Pipe Class
Flexible Liner
Pipe Shape
Vent Construction
Single Wall

Electrical and Operational Information

Fuel Type
All Fuel, Coal, Gas, Oil, Wood, Pellet

Warranty and Product Information

Category I Appliances, Fireplace, Stove
Manufacturer Warranty
Limited Lifetime
UL Listing Number
UL 1777, ULC S635