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CoolMizer® delivers ventilation air or FREE conditioning by selectively introducing outdoor air into any ducted heating and/or cooling system. Utilizing the system’s blower, air is drawn into the home through an opening controlled by Arzel dampers and distributed through the duct system.

The introduction of either ventilation air or free conditioning air is based upon temperature and humidity parameters for each mode. When the system is serving a heating or cooling call, and conditions are favorable, the system holds off mechanical conditioning and opens dampers to the outside. If it receives a second-stage call, it will bring the mechanical system on at its lowest operating mode to “assist” the outside air.

If conditions become unfavorable, then the system closes the dampers and goes back to normal mechanical service. Any call that is served by the HVAC equipment must satisfy before the CoolMizer® will interrupt again, so the system will not jump back and forth.

For maximum comfort and energy efficiency, add an Arzel Zoning system to the CoolMizer®.

Download the CoolMizer® Brochure for more information

Item ID Item Description
PAN-COOLM CoolMizer® panel


In Stock
  • Use with or without an Arzel Zoning System
  • Single or multi-stage equipment
  • Variable speed
  • Furnace
  • Dual fuel


In Stock
  • LCD display
  • Outdoor Air Temperature (OAT) sensor
  • Humidity sensor
  • Fresh air and economizer functions
  • Easy to use lever style terminals


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Frequently Asked Questions

It’s an easy way to install Economizer function to residential and light commercial equipment for free heating and cooling. We developed this product with today’s tighter and well-insulated homes in mind that develop cooling or loads on mild days and in multi-level structures where lower level zones require heat on warmer days.

The CoolMizer® works well with or without zoning, although zoning does offer more control of the free conditioning to areas where it’s needed, when it’s needed.

The CoolMizer® works with most zoning systems.

Yes, the CoolMizer® comes complete with everything needed for installation except dampers.

CLICK HERE to submit a request for an Arzel expert from our technical support department. They will assist you with damper selection, sizing, and other installation specifications.