Thermo - A high-quality sheet metal alternative for constructing return air ducts between joists and stud cavities. It is made of corrugated insulation faced with aluminum. It significantly reduces duct noises and labor.
Requires no shop fabrication
Staples easily and quickly to floor joists and stud cavities, saving on labor costs and adding higher quality to the job
Warning: this product contains a chemical known to the State of California to cause cancer. P65Warnings.ca.gov