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Intellidraft Diagram

IntelliDraft™ - How It Works

An elegant - and yet very simple – venting solution. The IntelliDraft is easy to install and the connection of the components is very simple. And all the components, except for a switch, stay out of sight. The illustration to the left shows the very simple set up.

The IntelliDraft connects a draft and safety controller, the ADC150 and its pressure sensor, to an RS chimney fan, the MFD chimney damper and the fireplace’s gas valve.

When the user wants to turn on the fireplace – typically using a wall switch – the controller signals the mechanical chimney damper to open. When the damper is open, the controller automatically ramps up the chimney fan speed until the draft set-point has been reached and the integrated draft protection switch closes.

At this point, the controller allows the fireplace to fire by opening the gas valve. During operation of the fireplace the control continues to monitor the draft and will maintain the proper draft set-point by modulating the chimney fan speed whenever needed.

When the user turns the fireplace or appliance off, the control leaves the damper open until all residual combustion products have been exhausted out of the building by the chimney fan; then the control discontinues chimney fan operation and closes the damper.

If for any reason the draft set-point can’t be maintained during operation, the controller will completely shut down the fireplace or appliance operation.

Events that could cause a complete shutdown include: 

  • Extreme chimney downdrafts
  • Extreme building depressurization
  • Electrical blackouts
  • Electrical or mechanical failure to any IntelliDraft system component

The Intellidraft system addresses all the relevant safety and energy-efficiency concerns in one cost-effective, code-compliant system. Added to a gas fireplace as a retrofit or in a new building project, the easy-to-install Intellidraft suite provides a completely safe gas appliance system:
Downdraft protection. High winds outdoors can cause downdraft in the chimney, and Intellidraft automatically counters downdraft effects by immediate increases in fan speed.
Spillage elimination. Depressurization in rooms with fireplaces can cause spillage, another dangerous condition that Intellidraft offsets with an immediate increase in fan speed.
Draft control. During sudden changes in room pressure, Intellidraft’s ADC150 control makes sure the draft remains constant by increasing or decreasing fan speed.
Automatic shutdown. In the event that a safe draft condition cannot be maintained, the ADC150 control shuts down the gas supply for the fireplace.
Energy savings. At the same time, Intellidraft saves energy and meets energy codes by automatically closing off the chimney when the fireplace is not being used.
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