4000 AM (Air Management) Model

Design: Variable outdoor air from 100% to 20%, and a modulating burner with a 25:1 turn-down ratio. Discharge air volume is fixed.

Function: Automatically responds to building pressure and temperature needs.

Application: Used in industrial and commercial buildings that have air quality and air management requirements for health, safety, comfort, and economy.



4000 AR (Air Rotation) Model

Design: Fixed 80% air rotation rate and 20% outdoor air replacement rate.

Function: Provides efficient, low-cost heating where minimum ventilation rates are required.

Application: Used in warehouses, distribution centers, retail outlets, etc.

NOTE: All models are available in upright or horizontal, as well as indoor or outdoor, configurations.
  4000 MUA (Make-Up Air) Model

Design: Fixed 100% replacement air.

Function: Supplies direct replacement air for building mechanical exhaust.

Application: Used as make-up air for paint booths and other industrial processes which incorporate mechanical exhaust.


4000 VAV (Variable Air Volume) Model

Design: Discharge air volume is variable.

Function: Works the same as the AM Model, except all recirculated air passes through a bypass section, not the building.

Application: Used where building pressurization is desired and where contaminants produced by the industrial or commercial process should not be recirculated.

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