Southwark Metal 1702025R8 Return Air Box R8 Insulation 20 Inches X 25 Inches

Product Description

The Southwark Metal 1702025R8 is a 170 Series Return Air Box with R8 insulation, sized at 20 inches x 25 inches. This unit is built for residential and light commercial HVAC installations where a reliable, insulated return air plenum is needed. Return air boxes connect the return air grille opening to the ductwork system, pulling conditioned room air back to the air handler or furnace. Proper sizing and insulation are critical to maintaining system efficiency and preventing energy loss through the plenum walls. The R8 insulation rating on this box significantly reduces heat transfer compared to standard non-insulated or R4 options, making it well suited for unconditioned spaces such as attics, crawl spaces, and exterior walls where thermal performance matters most. HVAC technicians and sheet metal contractors choose the Southwark 170 Series for its consistent build quality and availability in multiple insulation levels. This box is constructed from 26 gauge hot dipped galvanized steel meeting ASTM A653 CS Type B standards. Galvanized steel resists corrosion and holds up in humid environments typical of HVAC system installations. The unit features a 1 inch outward flange turned on the face for easy attachment to the ceiling or wall opening and to help secure the return air grille. The standard depth is 8 inches, which accommodates most residential framing layouts. The box measures 22 inches in length and 27 inches in width externally, with a listed unit face size of 20 inches x 25 inches. It weighs approximately 10 pounds and is sold individually. This product is manufactured in the USA and is Prop 65 compliant. It is the right choice for HVAC pros who need a flanged, insulated galvanized return air box that meets code requirements and performs reliably over the life of the system.

• R8 insulation rating reduces heat gain and loss through the plenum walls in unconditioned spaces
• 26 gauge hot dipped galvanized steel construction per ASTM A653 CS Type B for corrosion resistance and long service life
• Standard 1 inch outward flange simplifies installation and grille mounting at the return air opening

Product Highlights

The Southwark Metal 1702025R8 delivers a durable, insulated return air solution built to ASTM standards from galvanized steel, with R8 performance for demanding HVAC installations in unconditioned spaces.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 1702025R8

Technical Specifications

• Product Family: 170 Series Return Air Box
• Face Size: 20 inches x 25 inches
• External Length: 22 inches
• External Width: 27 inches
• External Height: 6 inches
• Standard Depth: 8 inches
• Gauge: 26 GA
• Material: Galvanized Steel
• R-Value: R8
• Insulated: Yes
• Flanged: Yes
• Flange Type: 1 inch turned out
• Galvanized Coating: Yes
• Weight: 10 pounds
• Country of Origin: USA
• Prop 65: Yes
• Unit of Measure: Each