Mm Manufacturing SP15-48T Supply Plenum R-6 Liner

Product Description

The MM MANUFACTURING SP15-48T is a supply plenum designed for residential and light commercial forced-air HVAC systems. Built from 26-gauge galvanized steel, this plenum transitions conditioned air from the air handler or furnace into the duct distribution system. It measures 48 inches in length, 26.5 inches in width, and 5.625 inches in height, and ships at 32 pounds. The unit features a 1.5-inch insulation liner rated R-6, reducing heat gain and condensation on supply-side airflow. HVAC installers and sheet metal mechanics specify this plenum where a factory-built, ready-to-install supply plenum is required on new or replacement air handler installations.

This supply plenum fits into residential and light commercial forced-air installations where the air handler or furnace requires a fabricated plenum box at the supply outlet. The 17-3/4 inch by 21 inch face opening and 48-inch body length accommodate standard equipment footprints commonly found in upflow and downflow unit configurations. The R-6 internal liner helps maintain supply air temperature between the unit and the first duct branch, which is especially important in unconditioned mechanical rooms and attic installations.

Key Features

• 26-gauge galvanized steel construction for corrosion resistance and structural rigidity
• 1.5-inch R-6 insulation liner controls heat transfer and limits condensation on supply air side
• 48-inch body length accommodates extended supply runs before first branch takeoff
• 17-3/4 inch by 21 inch face opening suits standard residential and light commercial air handler outlets
• Factory-fabricated unit reduces field fabrication time on installation
• Manufactured in the USA

Compatibility

Designed as an OEM-style supply plenum for residential and light commercial forced-air HVAC systems requiring a 17-3/4 inch by 21 inch supply outlet plenum box. Verify equipment outlet dimensions and available installation clearance before ordering.

Installation Notes

Supply plenums are installed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down and lock out the air handler or furnace at the disconnect before beginning plenum installation. Seal all plenum-to-equipment and plenum-to-duct joints with UL-listed mastic or foil tape per SMACNA and local mechanical code requirements. Support the plenum independently where required by the authority having jurisdiction to prevent load transfer onto the equipment cabinet.

Technical Specifications

• Length: 48 inches
• Width: 26.5 inches
• Height: 5.625 inches
• Face Opening: 17-3/4 x 21 inches
• Insulation Liner Thickness: 1.5 inches
• Insulation Rating: R-6
• Material: 26 GA galvanized steel
• Color: Silver
• Weight: 32 pounds
• Country of Origin: USA
• Prop 65: Yes

Standard Information

• Brand: MM MANUFACTURING
• Manufacturer Part Number: SP15-48T