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VAV and CAV Terminals

Suitable for any laboratory or commercial application, our range of Terminals and Attenuators helps effectively control the distribution of air into any building space/room.


Available in constant air volume (CAV) and variable air volume (VAV), rectangular or circular and a range of sizes, we have a product for every environment.

Product Benefits

Our Products


Four regulator options available in a range of sizes to meet your specific needs.

Safety and compliance

Enable precision control of air supply in building spaces where air quality is a safety issue.

Ease of installation

Can be quick and easily fitted as part of a new build project or retrospectively fitted in any commercial environment.

Energy savings

VAV options supply air according to need, helping reduce energy usage.

Auto sash controllers have advanced significantly in recent years but TEL still leads the field...

We have a video showing how the TEL Auto Sash Controller integrates with VAV systems for safe airflow and energy savings of up to 85%.

Latest Articles

People working with industrial and educational fumehoods must be protected at all times. Auto sash controllers keep people safe.

Today’s safe and efficient laboratories are a given, but fume hood health and safety standards were only introduced 25 years ago…

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2750 Vinland St.
Oshkosh, WI 54904

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