Duct Insulation Outdoor R‑8.0

Reflectix® Outdoor Duct Insulation consists of two outer layers of aluminum foil that reflect 97% or radiant heat. The outside layer of foil is made of heavier foil. Each layer of foil is bonded to a tough layer of polyethylene for strength. Two inner layers of insulating bubbles resist conductive heat flow while a center layer of polyethylene gives Reflectix® high reliability and strength.

• Wrap rectangular or round ductwork in HVAC applications
• Heating costs can be greatly reduced
• Eliminate unnecessary heat loss / gain and air leakage
• Helps to ensure consistent temperatures
• Non-toxic / non-carcinogenic
• Fiber-free
• Lowers heating and cooling costs year-round
• Reflects 97% radiant heat
• Costs less to install
• Lightweight and clean
• Not affected by moisture or humidity
• Does not promote nesting of birds, insects or rodents
• Resists growth of fungi, mold and mildew
• Does not require protective clothing or respirators to install
• ISO 9001:2015 certified manufacturing location

• CDW48050 (48”x 50’)

• Temperature Range: 250 Operational
• Nominal Thickness: 5/16 inch (.312)
• Weight: 1.25 oz./sq. ft.
• Flame Spread Index (ASTM E 84): Less than 25
• Smoke Developed Index (ASTM E 84): Less than 50
• Fire Rating: Class A/Class 1
• Linear Shrinkage: None
• Reflectance (IR): 97%
• Water Vapor Transmission (ASTM E 96): 0.02
• Puncture Resistance: 60 lb./in.
• Mold and Mildew: No Growth
• Emittance: 0.03
• Tensile Strength: 3.7 N/mm
• Pliability: No Cracking
• Hot Surface Performance: Passed

Note: Not for use in direct contact on surface temperatures that are 180 F or greater.

• Thermal Performance ASTM C518
• Hot Surface Performance ASTM C411
• Flame Spread and Smoke Density ASTM E84
• Fungus Resistance Mil-Std 810B Method 508
• Pliability Test ASTM C1224
• Water Vapor Transmission ASTM E96
• Tensile Strength ASTM C751
• Emittance Testing ASTM C1371
• State of California
• State of California Licensed Insulation Manufacturer
• State of Minnesota: Filed with Minnesota Insulation Standards Program
• R&D Services Emittance Testing
• Warnock Hersey Professional Services, LTD: Physical Properties Sheet Width, Length, Pliability, Water Vapor Permanence and Aged Water Vapor Permanence Report # 1/92
• Warnock Hersey Professional Services, LTD: Water Vapor Transmission Test ASTM-E96 (Dessicant Method) Report # 1/91

Note: Installation instructions and illustrated drawings are recommendations only, while proper local construction methods are the responsibility of the installer.

HV Spacers Affixed to Corners Method (Rectangular Ducts Only)

Spacer: HVSPACER (Reflectix® Hard Plastic Corner Spacer)

• Refer to the diagrams above.
• Make sure all sheet metal joints, seams and penetrations are sealed.
• Make sure the duct is free from dust and dirt by wiping it down with a shop rag.
• Install the HV Spacers to all 4 corners of the duct.
• Place the spacers every 24”.
• Verify the circumference of the duct over the top of the spacers.
• Cut the Reflectix® to this length plus 1”.
• Wrap the product over the spacers.
• Fasten the Reflectix® by either taping the seam with Butyl Foil Tape, or plier stapling the two edges together (goal is an air-tight, snug seam seal).
• Repeat the following steps over the outside of the first layer of insulation.
• Install the HV Spacers to all 4 corners (of the duct) on the product directly above the already affixed HV Spacers.
• Verify the circumference of the duct over the top of the spacers.
• Cut the insulation to this length plus 1”.
• Wrap the product over the spacers. Note: The heavier “reflective layer” side of the product should face the environmental elements.
• Fasten the Reflectix® by either taping the seam with Butyl Foil Tape, or plier stapling the two edges together (goal is an air-tight, snug seam seal).
• If the duct is supported with saddle clamps, make sure to install a spacer on the two bottom edges of the duct directly between the clamp and the duct.
• If the clamps are installed around the duct (such as plumbers tape), make sure that the seam is taped to prevent air movement.

Please Note Regarding Hangers:

Strap Hanger: Wrap Reflectix® with the seam at the hanger. Tape seam tightly around hanger.

Saddle Hanger: Make sure that there is a spacer below the hanger, between the insulation and the duct, to prevent the insulation from touching the duct.

Review These Important Safety Guidelines Prior to Installation:

• ALWAYS check local building codes before installing Reflectix®.
• ALWAYS check the area you are insulating and make any needed repairs. Any worn wiring should be replaced before you begin installing Reflectix®.
• ALWAYS make sure work areas are well ventilated and well lighted.
• ALWAYS use eye protection when operating a staple gun.
• ALWAYS use caution and common sense when using a staple gun. Be aware of electrical wiring locations. Stapling into a wire can cause severe shock or death. NEVER staple into electrical wiring.
• ALWAYS be careful when working with large pieces of Reflectix® on windy days.
• When installing Reflectix® on bright sunny days, it is best to wear sun glasses.
• Do not work in areas such as attics when temperatures are too hot.
• Please Note: The intention of these Installation Instructions and 3-D renderings are for the sole purpose of illustrating the correct location and relative position of the Reflectix® products in specific building assemblies. The correct construction methods and techniques are the responsibility of the installer or contractor. The methods outlined are recommendations on location of the Reflectix® products as a guideline. There are no claims on the part of Reflectix, Inc. that these building assemblies are finite standards or meet building code requirements (as they can vary by region).

Pictured: 1. Outdoor Duct Insulation, 2 and 3. Outdoor Duct Insulation Close-up

N23 – R-8.0 Outdoor Duct Insul Submittal Revised 102022