Knauf Air Duct Board-M with Hydroshield Technology is a resin-bonded fiber glass formed into rigid, rectangular boards faced on one side with a fire-resistant foil-scrim-kraft (FSK) vapor retarder, and its airstream surface is faced with a tightly bonded, non-woven mat. Available in EI-475 or EI-800, with butt edge or factory-applied shiplap edge, it offers excellent thermal and... (read more)

COPPUS carries a large selection of flexible air duct for a variety of ventilation application needs. Our most popular heavy duty duct features impregnated polyester duct designed for harsh, industrial environments. Our other selections include: economical light duty duct, source capture duct and hazardous location, anti-static duct. (read more)

Heat Exchange and Transfer will custom design air duct heaters to meet your requirements.

Heater Features:
This 600°F nitrogen heater is constructed with all stainless steel components. The heater is rated 360KW and includes an under flange insulation box and lifting lugs. (read more)

This specialty product is designed for intake or exhaust fans of large equipment. The equipment requires a substantial amount of airflow but untreated flow areas can create, and even spread, noise unnecessarily. These sound attenuators handle the noise without affecting needed airflow - they are often called silencers. (read more)

A semi rigid and lightweight non-insulated air duct. (read more)

Vaccon supplies the manufacturing and process industries with reliable vacuum products characterized by efficient operation, rugged construction and low cost. Their expanded product line includes the FA-51 Silencer that can be used on all pneumatic devices and in any facility operating equipment that uses compressed air. (read more)

Noise containing a tonal component is invariably perceived as being more objectionable than noise having the same overall level without a tone. As a result, many of the codes and ordinances which establish maximum noise levels further limit these overall levels when a tonal component is present. (read more)

Vaccon silencers are extremely effective in reducing air exhaust noise from venturi pumps and other pneumatic devices. Vaccon silencers reduce noise levels by up to 30dB while allowing high flow rates with minimal back pressure. (read more)

Tuned-dissipative silencers are appropriate for many applications. They successfully operate on:

• Coal and oil fired power plant fans
• Sewage treatment incinerator ID fans
• Fresh air fan intakes
• Solid waste incinerator ID fans

Duct Flow Meters for Air & Gas

Rheotherm flow sensing probes for duct gases are easy to install and provide long-term service with little or no maintenance. The output can be in mass, standard volume or velocity units. Options for hazardous locations (intrinsically safe/explosion-proof) are available. (read more)