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Description

Knauf Friendly Feel Duct Wrap with KwikStretch®

Markings is a thermal and acoustical insulation blanket made from highly resilient, inorganic glass fibers bonded by a thermosetting resin. It is available unfaced, with a foil-scrim-kraft (FSK) jacket, white or black metalized polypropylene-scrim-kraft (PSK) jacket, or with white or grey vinyl vapor retarders. Vapor retarders provide a 2" (51 mm) staple flange on one edge, and the factory-applied facing assures uniform quality. KwikStretch markings on the staple flange (FSK and PSK only) allow for easy and accurate job site measurements.

Application

Knauf Friendly Feel Duct Wrap is used as external insulation on commercial or residential heating or air conditioning ducts. It is suitable for the exterior of rectangular or round sheet metal ducts and spaces or surfaces where temperature and condensation must be controlled.

Features and Benefits

• Low "k" factor signifi cantly reduces heat gain or loss when applied with proper compression.

• Flexible.

• Lightweight.

• KwikStretch markings on the FSK and PSK staple fl anges.

• Excellent acoustical properties.

• Tough and resilient.

• Energy conservation, which lowers operating costs.

• System effi ciency increases; energy usage/costs decrease.

• Conforms easily to fl at or irregular surfaces.

• Rolls allow for faster installation, lower labor costs.

• Easier, faster measurement of stretch-out lengths.

• Reduces sound transmission through the duct wall.

• Assured condensation control when used with FSK or PSK facings, proper installation and sealed joints, seams and penetrations.

• Resists damage in shipment and during and after installation.

Specification Compliance

In U.S.:

• ASTM C 553; Type I, II, III

• ASTM C 795

• ASTM C 1136; Type II* (FSK and PSK facings only)

• ASTM C 1290

• GREENGUARD Environmental Institute™†

• California Title 24 (installed at 25% compression)

• HH-I-558C; Form B, Type I, Class 7

• MIL-I-24244C

• NFPA 90A and 90B

• NRC Reg. Guide 1.36

In Canada:

• CAN/ULC S102-M88

• CAN/CGSB-51.5M; Type II (FSK facing)

• CAN/CGSB-51.11-92

Technical Data

Surface Burning Characteristics

• UL/ULC listed.

• Unfaced or composite (insulation, facing and adhesive) does not exceed 25 Flame Spread,

50 Smoke Developed when tested in accordance with ASTM E 84, CAN/ULC S102-M88,

NFPA 255 and UL 723.

Temperature Range (ASTM C 411)

• Faced, can be used on ducts operating up to 250°F (121°C).

• Unfaced, up to 350°F (177°C).

Water Vapor Permeance (ASTM E 96, Procedure A)

• FSK and white PSK facings have maximum water vapor permeance of .02 perms.

• Black PSK facing has a maximum water vapor permeance of .09 perms.

• Vinyl facings have a maximum water vapor permeance of 1.3 perms.

Water Vapor Sorption (ASTM C 1104)

• Less than 5% by weight when tested for 96 hours at 120°F (49°C) and 95% relative humidity.

Corrosiveness (ASTM C 665)

• Will not accelerate corrosion of a steel panel compared to sterile cotton.

Mold Growth (ASTM C 1338)

• No growth.

Puncture Resistance

(TAPPI Test T803) (Beach Unit)

• FSK and PSK: 25

Application & Specification Guidelines Storage

• Protect stored insulation from water damage, construction damage and other abuse.

• If stored outside, proper protection from weather conditions should be provided.

Preparation

• Install Knauf Friendly Feel Duct Wrap over clean, dry sheet metal ducts. All sheet metal joints and seams must be sealed to prevent air leakage from the duct.

Application

• Install Knauf Friendly Feel Duct Wrap with facing to the outside to obtain specified R-value using a maximum of 25% compression.