SECTION 15290

DUCTWORK INSULATION

PART 1 GENERAL

SECTION INCLUDES

Ductwork insulation.

Duct Liner.

Insulation jackets.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [---_____] - Roofing: Installation and finishing of outdoor insulation jacket under roofing.

RELATED SECTIONS

Section [______] - Roofing: Finishing outdoor insulation jacket.

Section 09900 - Painting: Painting insulation jackets.

Section 15190 - Mechanical Identification.

Section 15890 - Ductwork: Glass fiber ductwork.

Section 15890 - Ductwork: Duct liner.

REFERENCES

ASTM B209 - Aluminum and Aluminum-Alloy Sheet and Plate.

ASTM C518 - Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.

ASTM C553 - Mineral Fiber Blanket and Felt Insulation.

ASTM C612 - Mineral Fiber Block and Board Thermal Insulation.

ASTM E84 - Surface Burning Characteristics of Building Materials.

ASTM E96 - Water Vapor Transmission of Materials.

NFPA 255 - Surface Burning Characteristics of Building Materials.

SMACNA - HVAC Duct Construction Standards - Metal and Flexible.

UL 723 - Surface Burning Characteristics of Building

Materials.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Product Data: Provide product description, list of materials and thickness for each service, and locations.

Samples:	Submit [two] [_______] samples of any representative size illustrating each insulation type.

Manufacturer's Installation Instructions: Indicate procedures which ensure acceptable workmanship and installation standards will be achieved.

QUALITY ASSURANCE

Materials: Flame spread/smoke developed rating of [25/50] [25/100] [_____/_____] in accordance with [ASTM E84] [NFPA 255] [UL 723].

QUALIFICATIONS

Applicator: Company specializing in performing the work of this section with minimum [three] [__________] years experience.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600.] [________.]

Deliver materials to site in original factory packaging, labeled with manufacturer's density and thickness.

Store insulation in original wrapping and protect from weather and construction traffic.

Protect insulation against dirt, water, chemical, and mechanical damage.

ENVIRONMENTAL REQUIREMENTS

Maintain ambient temperatures and conditions required by manufacturers of adhesives, mastics, and insulation cements.

Maintain temperature during and after installation for minimum period of [24] [____] hours.

PART 2 PRODUCTS

GLASS FIBER, FLEXIBLE

Manufacturers:

[_________________________________] Model [________].

Other acceptable manufacturers offering equivalent products.

[_____________________________] Model [________].

[_____________________________] Model [________].

[_____________________________] Model [________].

Insulation: ASTM [C553] [C612]; flexible, noncombustible blanket.

'K' ('Ksi') value : ASTM C518, [0.29] [0.31] [_____] at 75 degrees F ([0.042] [0.045] [_____] at 24 degrees C).

Maximum service temperature:	[250] [350] [____] degrees F ([121] [176] [____] degrees C).

Maximum moisture absorption: [0.20] [0.50] percent by volume.

Density:	[0.60] [0.75] [1.0] [1.5] [2.0] [___] lb/cu ft ([9.6] [12] [16] [24] [32] [___] kg/cu m).

Vapor Barrier Jacket

[Kraft paper reinforced with glass fiber yarn and bonded to aluminized film] [0.0032 inch (0.081 mm) vinyl].

Moisture vapor transmission:	ASTM E96; [0.04] [1.3] perm.

Secure with pressure sensitive tape.

Vapor Barrier Tape

Manufacturers:

[______________________________] Model [_______].

[______________________________] Model [_______].

[______________________________] Model [_______].

Kraft paper reinforced with glass fiber yarn and bonded to aluminized film, with pressure sensitive rubber based adhesive.

Tie Wire: Annealed steel, 16 gage (1.5 mm).

GLASS FIBER, RIGID

Manufacturers:

[_________________________________] Model [________].

Other acceptable manufacturers offering equivalent products.

[_____________________________] Model [________].

[_____________________________] Model [________].

[_____________________________] Model [________].

Insulation: ASTM C612; rigid, noncombustible blanket.

'K' ('Ksi') value : ASTM C518, [0.29] [0.31] [_____] at 75 degrees F ([0.042] [0.045] [_____] at 24 degrees C).

Maximum service temperature:	[250] [350] [____] degrees F ([121] [176] [____] degrees C).

Maximum moisture absorption: [0.20] [0.50] percent by volume.

Density:	[0.60] [0.75] [1.0] [1.5] [2.0] [___] lb/cu ft ([9.6] [12] [16] [24] [32] [___] kg/cu m).

Vapor Barrier Jacket

[Kraft paper reinforced with glass fiber yarn and bonded to aluminized film] [0.0032 inch (0.081 mm) vinyl].

Moisture vapor transmission:	ASTM E96; [0.04] [1.3] perm.

Secure with pressure sensitive tape.

Vapor Barrier Tape

Manufacturers:

[______________________________] Model [_______].

[______________________________] Model [_______].

[______________________________] Model [_______].

Kraft paper reinforced with glass fiber yarn and bonded to aluminized film, with pressure sensitive rubber based adhesive.

JACKETS

Canvas Jacket: UL listed

Fabric: 6 oz/sq yd (220 g/sq m), plain weave cotton treated with dilute fire retardant lagging adhesive.

Lagging Adhesive

Manufacturers:

[___________________________] Model [______].

[___________________________] Model [______].

[___________________________] Model [______].

Compatible with insulation.

Outdoor Jacket: Asphalt impregnated and coated mineral fiber sheet, [50] [36] lb/square ([___] kg/sq m).

Aluminum Jacket: ASTM B209

Thickness: [0.016] [0.020] [0.025] [0.032] [0.040] [_____] inch ([0.40] [0.50] [ 0.064] [0.080] [1.00] [_____] mm) sheet.

Finish: [Smooth.] [Embossed.] [_________.]

Joining:	Longitudinal slip joints and 2 inch (50 mm) laps.

Fittings: [0.016] [_____] inch ([0.4] [_____] mm) thick die shaped fitting covers with factory attached protective liner.

Metal Jacket Bands: 3/8 inch (10 mm) wide; [[0.015] [_____] inch ([0.38] [_____] mm) thick aluminum.] [[0.010][_____] inch ([0.25] [_____] mm) thick stainless steel.]

GLASS FIBER DUCT LINER, FLEXIBLE

Manufacturers:

[_________________________________] Model [________].

Other acceptable manufacturers offering equivalent products.

[_____________________________] Model [________].

[_____________________________] Model [________].

[_____________________________] Model [________].

Insulation: ASTM C553; flexible, noncombustible blanket.

'K' ('Ksi') value : ASTM C518, [0.28] [0.26] [0.24] [_____] at 75 degrees F ([0.041] [0.038] [0.035] [_____] at 24 degrees C).

Maximum service temperature:	[250] [____] degrees F ([121] [____] degrees C).

Density:	[1.5] [2.0] [3.0] [___] lb/cu ft ([24] [32] [48] [___] kg/cu m).

Maximum Velocity on Coated Air Side:	[4,000] [6,000] [_____] ft/min ([20.3] [30.5] [_____] m/sec).

Adhesive

Manufacturers:

[______________________________] Model [_______].

[______________________________] Model [_______].

[______________________________] Model [_______].

Waterproof [fire-retardant] type.

Liner Fasteners:	Galvanized steel, [self-adhesive pad] [impact applied] [welded] with [integral] [press on] head.

GLASS FIBER DUCT LINER, RIGID

Manufacturers:

[_________________________________] Model [________].

Other acceptable manufacturers offering equivalent products.

[_____________________________] Model [________].

[_____________________________] Model [________].

[_____________________________] Model [________].

Insulation: ASTM C612; semi-rigid, noncombustible.

'K' ('Ksi') value : ASTM C518, [0.23] [_____] at 75 degrees F ([0.033] [_____] at 24 degrees C).

Maximum service temperature:	[250] [____] degrees F ([121] [____] degrees C).

Density:	[2.0] [3.0] [___] lb/cu ft ([32] [48] [___] kg/cu m).

Maximum Velocity on Coated Air Side:	[4,000] [6,000] [_____] ft/min ([20.3] [30.5] [_____] m/sec).

Adhesive

Manufacturers:

[______________________________] Model [_______].

[______________________________] Model [_______].

[______________________________] Model [_______].

Waterproof [fire-retardant] type.

Liner Fasteners:	Galvanized steel, [self-adhesive pad] [impact applied] [welded] with [integral] [press on] head.

PART 3 EXECUTION

EXAMINATION

Verify that ductwork has been tested before applying insulation materials.

Verify that surfaces are clean, foreign material removed, and dry.

INSTALLATION

Install materials in accordance with manufacturer's instructions.

Insulated ductwork conveying air below ambient temperature:

Provide insulation with vapor barrier jackets.

Finish with tape and vapor barrier jacket.

Continue insulation through walls, sleeves, hangers, and other duct penetrations.

Insulate entire system including fittings, joints, flanges, fire dampers, flexible connections, and expansion joints.

Insulated ductwork conveying air above ambient temperature:

Provide with or without standard vapor barrier jacket.

Insulate fittings and joints. Where service access is required, bevel and seal ends of insulation.

For ductwork exposed in mechanical equipment rooms or in finished spaces [below 10 feet (3 meters) above finished floor], finish with [canvas jacket sized for finish painting] [aluminum jacket].

For exterior applications, provide insulation with vapour barrier jacket. Cover with [outdoor jacket finished as specified in Section [_______]] [with calked aluminum jacket with seams located on bottom side of horizontal duct section].

External Duct Insulation Application:

Secure insulation with vapour barrier with wires and seal jacket joints with vapour barrier adhesive or tape to match jacket.

Secure insulation without vapour barrier with staples, tape, or wires.

Install without sag on underside of ductwork. Use adhesive or mechanical fasteners where necessary to prevent sagging. Lift ductwork off trapeze hangers and insert spacers.

Seal vapour barrier penetrations by mechanical fasteners with vapour barrier adhesive.

Stop and point insulation around access doors and damper operators to allow operation without disturbing wrapping.

Duct [and Plenum] Liner Application:

Adhere insulation with adhesive for [90] [100] percent coverage.

Secure insulation with mechanical liner fasteners. Refer to SMACNA Standards for spacing.

Seal and smooth joints.

Seal liner surface penetrations with adhesive.

Duct dimensions indicated are net inside dimensions required for air flow. Increase duct size to allow for insulation thickness.

TOLERANCE

Substituted insulation materials shall provide thermal resistance within 10 percent at normal conditions, as materials indicated.

FLEXIBLE GLASS FIBER DUCTWORK INSULATION SCHEDULE

DUCTWORK	THICKNESS	FINISH

Inch (mm)

Combustion Air Duct

Evaporative Condenser

Intake and Exhaust

Exhaust Ducts Within

10 ft (3 m) of

Exterior Openings

Exhaust Ducts Exposed

to Outdoor Air

Outside Air Intake Ducts

Plenums

Plenums (Cooling System)

Ventilation Equipment Casings

Supply Ducts

Supply Ducts From Fans

to Vertical Ducts

in Shafts (Cooling System)

Supply Ducts in Vertical Shafts

(Cooling Systems)

Supply ducts After Terminal Boxes

Return and Relief Ducts in

Mechanical Rooms

Ducts Exposed to Outdoors

RIGID GLASS FIBER DUCTWORK INSULATION SCHEDULE

FLEXIBLE GLASS FIBER DUCT LINER INSULATION SCHEDULE

RIGID GLASS FIBER DUCT LINER INSULATION SCHEDULE

END OF SECTION