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Colorado State University, Pueblo


Fixed operational and safety issues in the laboratory airflow systems.

The Chemistry and Life Science Building airflow systems were energy inefficient and becoming less safe: 15 out of 34 fume hoods failed the certification test. This older equipment also lacked basic containment alarms.

In addition to safety concerns, the lab spaces were loud, uncomfortable, and very expensive to operate.

"Our campus customers welcome the fume hoods upgrade. We appreciate how well your team provided customer service while delivering on-time and on-budget”

ESCO Engineering Manager*

* Reference available upon request


Turnkey retrofit of 39 Chemical Fume Hoods with new VAV controls and Auto Sashes. 

Converted 3 Labs from CAV to VAV.

Installation included: 

  • Converted VAV controls to CAV fume hoods

  • Replaced existing VAV fume hood controls, mono-blade dampers, & room pressure controllersReplaced fast acting exhaust valve actuators,

  • Installed new fresh air bleed dampers and controllers

  • Installed Automatic Sash closers 

  • Sealed lab room envelope to improve pressure control

  • Re-balanced the exhaust fans and static pressure control to decrease the noise level

  • Certified fume hood safety & energy efficiency


Industry:  Higher Education

Location: Pueblo, CO

Annual Savings: $66,403

Simple Payback: 6.4 years

Energy Savings:

379,498 kWh/yr

  59,277 Therms/yr

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%.

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