Southwark Metal USBR821142824 Unit Support Box R-8 Insulation 21 1/4 Inches X 28 Inches X 24 Inches

Product Description

The Southwark Metal USBR821142824 is a unit support box with R-8 insulation, measuring 21.25 inches wide by 28 inches long by 24 inches tall. It is designed for HVAC installations where a rigid, insulated support enclosure is needed to house air handling units, fan coil units, or similar equipment in commercial and residential mechanical systems. HVAC contractors and sheet metal installers rely on unit support boxes like this one to provide a stable, thermally efficient base that reduces heat loss and condensation around the unit. The USBR821142824 is constructed from 26-gauge hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, giving it strong corrosion resistance for long-term performance in mechanical rooms, crawl spaces, attics, and other demanding environments. The R-8 insulation is factory-installed using adhesive and stick pins, ensuring it stays securely in place during installation and throughout the life of the system. All four sides of the box feature a 1-inch turned-in flange, and three sides include a 1-inch flange turned up to create a secure seat for the air handler or fan coil unit. All sides are beaded for added structural strength, reducing flex and maintaining shape under load. The opening can be oriented on either the A-width or B-length side based on the installer's requirements. This unit support box ships as a single unit and is made in the USA. With a cubic measurement of approximately 8.26 cubic feet and a shipping weight of 32.2 pounds, it is built to handle standard commercial and residential HVAC equipment. Trade professionals searching for galvanized HVAC unit support boxes, insulated equipment support enclosures, or R-8 sheet metal support boxes will find the USBR821142824 a reliable, code-conscious choice for their next mechanical installation.

• 26-gauge hot-dipped galvanized steel construction per ASTM A653 CS Type B for corrosion resistance
• R-8 insulation factory-installed with adhesive and stick pins on all interior surfaces
• Beaded sides and 1-inch turned flanges provide structural rigidity and a secure equipment seat

Product Highlights

The Southwark Metal USBR821142824 unit support box delivers a durable, insulated galvanized steel enclosure for HVAC equipment support, combining R-8 thermal performance with heavy-duty 26-gauge construction and field-ready flange details.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: USBR821142824

Technical Specifications

• Size: 21 1/4 inches x 28 inches x 24 inches
• Width: 21.25 inches
• Length: 28 inches
• Height: 24 inches
• Gauge: 26 GA
• Material: Galvanized Steel
• Insulation: R-8
• Insulated: Yes
• Galvanized: Yes
• Adjustable: No
• Cubic Measurement: 8.2639 cubic feet
• Weight: 32.2 pounds
• Country of Origin: USA
• Unit of Measure: EA
• Prop 65: Yes