Last updated:
Thursday, 09 February 2012
CASV, Chimney Automation System
CASV System

 Chimney Automation - Green Sustainable Venting Designs  The CASV, Chimney Automation System™ is a demand controlled exhaust system designed for commercial boilers and water heaters in buildings where the exhaust is powered by a chimney fan on the exterior of the building. It maintains a precise draft by constantly adjusting the exhaust rate to meet current needs. The concept can provide substantial operating savings over gravity systems and offer significantly better draft control which reduces emissions.


The CASV System can be combined with an MCAS, Modulating Combustion Air-supply System™ and can also work with a MODS, Modulating Over-draft Damper System™


Sustainable Advantages


Economical. Over a 15-year period a typical demand-controlled CASV-system serving 4 high-efficiency boilers in a 20-story building costs 50% less to operate than a combined system without demand-control. Most of these savings are energy savings due to boiler-efficiency improvements.


Energy Savings. A demand-controlled mechanical draft system provides more precise draft control so the O2 levels can be lowered. This can lead to annual savings of 2-4% and reduce emission dramatically.


Material and Labor Savings. Combining chimney flues and reducing diameters save material and labor when using a demand-controlled mechanical draft system. Smaller chimneys are easier and less expensive to install.


Space Savings. Combining chimneys and reducing diameters save buildings space. A small footprint can save as much as $15,000 worth of space in a 20-story building. Even more space can be saved by redirecting the chimney out through a sidewall.


Aesthetics. Today's buildings are designed to be functional and attractive. While the EXHAUSTO demand-controlled mechanical draft system provide great space savings, it can also keep chimney terminations out of sight.

Other benefits of installing a CASV system include: 

  • Extremely low noise level
  • Priority Operation Function and Bearing Cycle Activation
  • Interlocks 6 appliances (standard) or as many as necessary with add-on relay boards.
  • Easy programming of essential functions (80 parameters are programmable for customized solutions).
  • Cast aluminum chimney fan and impeller for use with Category I, II, III and IV appliances (condensing and non-condensing).
  • Spark-resistant construction with high-temperature TEFC-motor with a Class H temperature rating, direct drive and true variable speed (inverter-duty).
  • Listed to UL378, Standard for Draft Equipment and CSA3-B255-M81 for Mechanical Flue Gas Exhausters.
  • Maintenance free and service-friendly design.