HVAC/R & Plumbing Contractor

Reflectix® RAP (Corrugated Sheet) Return Air Duct Panning

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

Reflectix® RAP (Corrugated) is an alternative to conventional sheet metal for return air duct panning. It may be used to enclose the bottom of return air plenums, between the joist spaces, stud cavities, and wall and ceiling cavities.

Product Description

Reflectix® RAP (Corrugated) has a reflective surface on both sides and a layer of corrugate in the middle. All Reflectix® RAP (Corrugated) products are rated Class 1 / Class A per the UL 723 test standard, along with the manufacturer’s name for easy identification by code officials.

Benefits

  • Reduces noise through plenum
  • No shop fabrication required
  • Class 1 / Class A per UL 723 test standard
  • Staple to floor joists and stud cavities
  • Easy to install
  • Saves labor cost of installation
  • Lightweight & pre-cut
  • Less costly than sheet metal
  • Non-toxic / non-carcinogenic

Reflectix® RAP Stock Sizes

Product — Part # — Size — Pcs/Case:

  • Reflectix® RAP — HVRC1648025 — 16”x 48” — 25
  • Reflectix® RAP — HVRC19548025 — 19.5”x 48” — 25
  • Reflectix® RAP — HVRC2448025 — 24”x 48” — 25
  • Reflectix® RAP — HVRC3236025 — 32”x 36” — 25

Joist Headers

Product — Part # — Size — Pcs/Case:

  • Standard Header — HVRH1616125 — 16”x 16” — 125
  • I-Joist Header — HVRH1617125 — 16”x 17” — 125
  • I-Joist Header — HVRH1916125 — 19”x 16” — 125

Technical Data

Physical Properties — Test Method — Reflective / Corrugated / Reflective

  • Fire Rating — UL 723 Tested — Class 1 / Class A
  • Flame Spread — UL 723 Tested — 5
  • Smoke Development — UL 723 Tested — 0

Installation Instructions

Place the 1st section of Reflectix® RAP “HVRC” as follows:

Starting Before Return Air Trunk Has Been Installed

  • Install Reflectix® RAP (Corrugated) “HVRC” (print side is out or down) centered between joists & 2” or more past the top side of the duct. This provides for a tight seal when final trunk has been installed.
  • Staple side tabs to the bottom of the joists using a minimum 3/8” staple every 2”, insuring that the print side is out or down. (Also approved attachment methods; steel staples, sheet metal screws, roofing nails)

Starting After Return Air Trunk, Beam or Wall Plate

  • Install Reflectix® RAP (Corrugated) “HVRC” (print side is out or down) by scoring 1” lip across the end of the panel and bend down 90 degrees.
  • Center Reflectix® RAP (Corrugated) “HVRC” between the bottom of joist. Butt it tightly to existing trunk, beam or plate.
  • Tape seams with an aluminum tape or UL181 aluminum.
  • Staple side tabs to the bottom of the joists using a minimum 3/8” staple every 2”, insuring that the print side is out or down. (Also approved attachment methods; steel staples, sheet metal screws, roofing nails)

Adding the next section of Reflectix® RAP “HVRC”

  • Butt leading edge of sheet to the to next butt edge of sheet tightly.
  • Staple and tape seams as before (described above).
  • Continue repeating the process until you have reached the end of the return. Install with print side out or down.

Installing Reflectix® RAP “HVRC” Header

  • Install with print side out or down.
  • Bend header inward closing off open end of the return air joist space.
  • Maintain a tight fit, while securing the top and sides of the header by stapling using the method as described above.
  • Note: There is no difference in the application to the side or bottom of the joist. Open web trusses are acceptable.

Important Information

  • In the 20003 International Mechanical Code Commentary – Section 602.3; Sheet Metal has traditionally been used for both stud cavity and joist space plenums. Code does not specify types of materials allowed for panning the bottom of open joists to create joist plenums. Traditionally, sheet metal has been used, however composite materials have and are used.
  • Check your local codes before installation for compliance in your area.
  • Installation instructions and illustrated drawings are recommendations only, while proper local construction methods are the responsibility of the installer.

Important

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).

Photos

Pictured: Reflectix® RAP (Corrugated Sheet) Return Air Duct Panning

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