Mcdaniel Metals SP9-48T Supply Plenum R-6 Insulated

Product Description

The MCDANIEL METALS SP9-48T is a steel supply plenum designed for residential and light commercial forced-air HVAC distribution systems. It measures 16 inches wide by 11.25 inches tall by 48 inches long and ships at 20 pounds. The plenum is factory-insulated with 1.5 inches of R-6 liner, providing thermal performance that reduces heat gain and condensation on supply air ducts. Licensed HVAC technicians and sheet metal contractors install this component as the primary air distribution trunk directly off the air handler or furnace supply outlet.

This supply plenum is suited for residential central air and gas furnace systems where a pre-insulated trunk section is required at the supply transition. The R-6 insulation meets common energy code requirements for conditioned supply ductwork in unconditioned spaces such as attics, crawlspaces, and mechanical rooms. Its 48-inch length makes it a practical single-section trunk for standard residential air handler installations where full runs are assembled from multiple sections or individual plenums.

Key Features

• Factory-applied 1.5-inch R-6 insulation liner reduces heat transfer and condensation on supply air
• 16 inches x 11.25 inches x 48 inches profile fits standard residential supply trunk applications
• Steel construction for structural rigidity and long service life
• Domestic manufacture — Country of Origin: USA
• Pre-insulated design reduces field labor compared to field-wrapping bare sheet metal

Compatibility

Designed as an OEM-style supply plenum section for residential and light commercial forced-air HVAC systems requiring a 16-inch by 11.25-inch rectangular trunk configuration with R-6 insulation.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with applicable mechanical codes including SMACNA duct construction standards. Shut down and lock out the air handler or furnace before connecting or modifying supply ductwork. Seal all seams and joints with listed mastic or UL 181-rated tape per local code requirements. Avoid compressing or damaging the insulation liner during handling and installation, as compression reduces effective R-value.