Mm Manufacturing PL111/4X16X36-R6 Supply Plenum R6 26GA

Product Description

The MM MANUFACTURING PL111/4X16X36-R6 is a galvanized steel supply plenum fabricated to order for residential and light commercial HVAC duct systems. Measuring 11.25 inches by 16 inches by 36 inches, this plenum is built from 26-gauge galvanized sheet metal and ships with R6 duct liner insulation already incorporated. It connects the air handler or furnace supply outlet to the main trunk or branch duct network, managing conditioned airflow at the start of the distribution system. HVAC sheet metal mechanics and ductwork installers typically handle fabrication and installation of this component as part of a new system build or duct replacement project.

This plenum is suited for forced-air residential and light commercial HVAC applications where a factory-fabricated, insulated plenum box is required. Its R6 insulation rating reduces heat gain and loss in unconditioned spaces such as attics, crawlspaces, and mechanical rooms. The unit ships unflanged, making it compatible with standard slip-and-drive or other connection methods used in conventional sheet metal duct assemblies. Installers working in jurisdictions that follow ACCA Manual D or SMACNA duct construction standards will find this unit aligns with common field practices.

Key Features

• 26-gauge galvanized steel construction for corrosion resistance and structural rigidity
• R6 duct liner insulation reduces thermal loss in unconditioned spaces
• Fabricated to order ensuring consistent gauge and dimensional accuracy
• Unflanged design compatible with slip-and-drive and standard sheet metal connections
• Silver galvanized finish — no additional coating required for typical HVAC applications
• Made in the USA

Compatibility

Designed as an OEM-style fabricated supply plenum for residential and light commercial forced-air HVAC systems using standard sheet metal ductwork. No specific equipment model compatibility is stated by the manufacturer for this unit.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic. Power down the air handler or furnace and shut off any associated gas supply before beginning plenum work. Secure all connections using appropriate fasteners and seal joints with listed duct sealant or mastic per local mechanical code requirements. Handle the unit carefully during installation to avoid compressing or damaging the interior duct liner.

Technical Specifications

• Length: 11.25 inches
• Width: 16 inches
• Height: 36 inches
• Weight: 25 pounds
• Gauge: 26 GA
• R-Value: R6
• Material: Galvanized Steel
• Color: Silver
• Insulated: Yes
• Flanged: No
• Country of Origin: USA
• UPC: 845927045174

Standard Information

• Brand: MM MANUFACTURING
• Manufacturer Part Number: PL111/4X16X36-R6