Johns Manville announced that all its preformed round duct products for air handling systems will now be manufactured at its Defiance, Ohio facility.

Products include “Spiracoustic” preformed round duct liner for small diameter round metal duct systems, “SuperRound” preformed round fiber glass duct for hvac systems in new construction or renovation, both of which are coated with “Permacote,” an acrylic polymer airstream surface coating for improved acoustical performance, better airflow and easier maintenance. “RigidRound” uncoated fiber glass duct is also produced in Defiance.

For more information about any of these products, phone 800-654-3103.