Southwark Metal USBR824342120 Unit Support Box R-8 Insulation 24 3/4 Inches X 21 Inches X 20 Inches

Product Description

The Southwark Metal USBR824342120 is a galvanized steel unit support box with R-8 insulation, designed to support HVAC air handling units, fan coils, and similar mechanical equipment in residential and light commercial installations. It measures 24 3/4 inches wide by 21 inches long by 20 inches tall, providing a rigid, thermally insulated platform for equipment placement above finished ceilings or in attic spaces. Southwark Metal manufactures this unit support box from 26-gauge hot-dipped galvanized steel conforming to ASTM A653 CS Type B, delivering corrosion resistance and structural durability in humid or condensation-prone environments. The galvanized coating protects the steel from rust, making this support box well-suited for long-term performance in unconditioned spaces such as attics and mechanical rooms. The R-8 insulation is factory-installed using adhesive and stick pins, reducing thermal loss and helping HVAC systems maintain efficiency. HVAC installers and sheet metal contractors rely on unit support boxes like this one to safely elevate and stabilize air handlers, keeping equipment level and secure while providing a proper air seal around the unit opening. The box features a 1-inch turned-in flange on all sides and a 1-inch flange turned up on three sides, with the customer specifying whether the opening falls on the A-width or B-length side. All sides are beaded for added rigidity and strength, which is critical when supporting the weight of an air handling unit overhead. With a unit weight of 23.5 pounds and a cubic measurement of approximately 6 cubic feet, this box is sized for mid-range residential air handlers. It is manufactured in the USA and sold individually. HVAC technicians, sheet metal workers, and mechanical contractors searching for insulated unit support boxes, galvanized HVAC equipment supports, or air handler support boxes will find this product meets standard installation requirements.

• 26-gauge hot-dipped galvanized steel per ASTM A653 CS Type B for corrosion resistance and structural integrity
• Factory-installed R-8 insulation applied with adhesive and stick pins for improved thermal performance
• All sides beaded for added strength; 1-inch turned-in flange on all sides with 1-inch flange turned up on three sides

Product Highlights

The Southwark Metal USBR824342120 unit support box delivers a durable, insulated, galvanized steel platform for HVAC air handler installations, combining R-8 thermal insulation with heavy-duty construction in a 24 3/4 inches x 21 inches x 20 inches footprint. It is manufactured in the USA and built to meet the demands of professional HVAC and sheet metal contractors.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: USBR824342120

Technical Specifications

• Width: 24.75 inches
• Length: 21 inches
• Height: 20 inches
• Size: 24 3/4 inches x 21 inches x 20 inches
• Weight: 23.5 pounds
• Cubic Measurement: 6.0156 cubic feet
• Material: Galvanized Steel
• Gauge: 26 GA
• Insulated: Yes
• Insulation Rating: R-8
• Galvanized: Yes
• Adjustable: No
• Country of Origin: USA
• Unit of Measure: Each
• Prop 65: Yes