Building and Commercial Insulation
We offer a full line of faced and plain metal building insulation and accessories to the post frame and metal building construction markets.

Installation Instructions: Air Ducts and Air Connectors

Connections

  • 1.  After desired length is determined, cut completely around and through duct with knife or scissors. Cut wire with wire cutters.
  • 2.  Pull back jacket and insulation from core. Slide at least 1" [25 mm] of core over collar, pipe or fitting. Tape core with at least 2 wraps of duct tape. Secure with clamp.
  • 3.  Pull jacket and insulation back over core. Tape jacket with at least 2 wraps of duct tape. A clamp may be used in place of or in combination with the duct tape.

Splices

  • 1.  Peel back jacket and insulation from core. Butt two cores together on a standard 4" [100 mm] metal sleeve.
  • 2.  Tape cores together with at least 2 wraps of duct tape. Secure with 2 clamps.
  • 3.  Pull jacket and insulation back over cores. Tape jackets together with at least 2 wraps of duct tape.
NOTES:
  1. For un insulated air ducts and air connectors, disregard references to insulation and jacket.
  2. Use beaded fittings for pressures exceeding 2" w.g. [500 Pa] and for diameters 12" [300 mm] and larger.
  3. Use tapes listed and labeled in accordance with Standard UL 181B and marked "181B-FX".
  4. Use clamps as specified on manufacturer's UL 181 Installation Instructions.

STANDARD UL-181 for Factory Made Air Ducts and Connectors File Listings: MH9770-AIR DUCTS, MH12212-AIR CONNECTORS

BANDS: Use Panduit PLT8H or 1/2" wide aluminum, stainless or galvanized steel bands.

DUCT STRAPS/CABLE TIES: Use All-States RT and RTH Single Loop Cable Ties (or equivalent) installed in accordance with the tie manufacturer's instructions.

  • Flexible Air Duct installation vs. Flexible Connector installation: There are distinct differences in the use and limitations between "air duct" and "connector," as defined by "Flexible Duct Performance & Installation Standards," Third Edition, published by the Air Diffusion Council. In accordance with NFPA 90A and 90B Standards, national building codes, and local building codes, there are specific limitations on the use and installation of these items. Particular attention must be paid to the limitation for Connector (Anco System 3100). In all cases, the most stringent of codes must be met. The U.L. label for air duct is rectangular in shape; whereas, the U.L. label for Connector is round. This allows easy differentiation between them. For example, connector CANNOT be used in lengths exceeding 14 lineal feet as per NFPA standards.
  • Avoid installations where exposure to direct sunlight can occur. Prolonged exposure to sunlight could cause degradation to the vapor barrier.
  • Install duct fully extended, do NOT install in the compressed state or use excess lengths. This will noticeably increase friction losses.
  • If suspended, product shall be supported at no less then 4" intervals by hanger, saddle, or ceiling joist or other commonly used support of no less than 1-1/2" width at contact points with maximum permissible sag of 1/2" per lineal foot of spacing between supports.
  • Avoid bending ducts across sharp corners or incidental contact with metal fixtures, pipes or conduits. Radius at center line of bend shall NOT be less than one duct diameter.
  • Terminal devices shall be supported independently of the product
  • If the internal core is damages, replace the duct entirely or cu the duct and treat the affected area in the same manner as a connection or splice as per the air ducts and air connectors installation instructions above.
  • Sheet metal collars to which the product with plain ends is attached shall be a minimum of 2 inches in length. Sheet metal sleeves used for joining two sections with plain ends shall be a minimum of 4 inches in length.
  • Anco Textrafine™ continuous filament fibrous glass insulation is not listed as a hazardous material. However, the use of gloves, safety glasses, long sleeved clothing, and long trousers may reduce skin irritation. If airborne particulate exceeds permissible exposure levels, respiratory protection is needed in accordance with OSHA 1910.134 for precautionary protection against nuisance dusts.
  • Additional Instructions: See Chapter 4, Installation Guidelines, "Flexible Duct Performance & Installation Standards," Third Edition, published by the Air Diffusion Council for more details. NFPA 90A and 90B and the Uniform Mechanical Code, Chapter 10 are also good references. It is always recommended that local code officials are consulted in regards to installation of our products as each locality has its own peculiarities.
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