Thermaflex 52312000001 Flex Duct 12in X 25ft R8 Insulated

Product Description

The THERMAFLEX 52312000001 is an R8-insulated flexible duct measuring 12 inches in diameter and 25 feet in length, designed for residential and light commercial HVAC air distribution systems. The black polyethylene outer jacket protects the insulation layer during installation and throughout the service life of the duct run. With an R8 thermal efficiency rating, this flex duct meets or exceeds energy code requirements in most jurisdictions, making it a strong choice for new construction and replacement projects in conditioned-space and attic applications. HVAC technicians and mechanical contractors handle installation as part of forced-air system trunk and branch layouts.

This insulated flexible duct is suited for residential forced-air heating and cooling systems as well as light commercial air handler installations. It is appropriate for attic, crawlspace, and conditioned-space routing where high insulation values are required by energy codes such as IECC. The KP series construction is intended for standard supply and return branch runs connecting diffusers and grilles to the main trunk or plenum. No specific compatible unit models are stated in the product data.

Key Features

• R8 thermal insulation rating meets current energy code requirements for duct insulation in unconditioned spaces
• 12-inch diameter accommodates high-volume branch and trunk run applications
• 25-foot length reduces the number of connections needed on longer duct runs
• Black polyethylene outer jacket provides protection against tears and moisture during handling and installation
• KP series construction designed for reliable performance in standard forced-air HVAC applications

Compatibility

Designed as an OEM-style flexible duct replacement or new-installation component for residential and light commercial forced-air HVAC systems requiring a 12-inch insulated branch or trunk duct with R8 insulation value.

Installation Notes

Installation should be performed by a licensed HVAC technician or mechanical contractor in accordance with SMACNA flexible duct installation standards and applicable local mechanical codes. Power down the air handler and shut off the system before connecting or disconnecting duct sections. Avoid sharp bends, compression, or kinking of the flex duct, as these conditions significantly reduce airflow and effective insulation performance. Secure all connections with approved mechanical fasteners and mastic or listed duct tape rated for flexible duct systems.