EXHAUSTO's Chimney Automation System (CASV) is for installation and use with multiple and/or modulating boilers and water heaters. It can be used in conjunction with almost any type of appliance and fuel, whether it is forced draft, atmospheric or condensing design.

The Chimney Automation System maintains a perfect, constant draft for the appliances by modulating the chimney fan capacity. The system is activated when there is a call for heat. It will create and maintain a pre-set draft prior to or immediately after the appliance fires.

The system monitors the draft condition at any time and has an integrated safety function. Should the draft fall more than 40% below the set point for more than 12 seconds, it will deactivate the appliances to prevent a potentially hazardous situation.


Advantages to using a chimney automation system are as follows:

• Improved Aesthetics - A chimney automation system can improve the look of a building by hiding the stack. Tall stacks are no longer required allowing for termination’s at the roof level.
• Cost Savings - the overall cost of an installation can be reduced. The stack will not need to be as tall or the diameter as wide compared to conventional gravity venting. In many cases side wall venting can be utilized as well.
• Improved Safety - the risk of carbon monoxide spillage is eliminated with the use of a chimney automation system. In fact the Exhausto system includes a spillage-warning device as a standard feature.
• Design Freedom - no longer are designers limited as to how the venting system is to be incorporated into their plan. The use of the automated chimney system ensures proper draft and because it is an engineered system it meets with code requirements for the gravity system.
• Operational Savings - By controlling the draft across all operating conditions, boilers will operate at peak efficiency and provide a significant saving for the owner.