WEATHER-RITE™ IDF Features & Benefits

  1. Discharge air free of combustion by-products
  2. High efficiency due to three or four pass heat exchanger designs
  3. Longer part longevity: Motors, belts and bearings are placed out of the airstream
  4. Rugged, heavy-duty construction: Unit cabinet is supported by welded steel frame. Casing is finish-coated to help protect against corrosion
  5. Evaporative and mechanical cooling packages available
  6. Modular design allows for custom configurations to meet customers' needs
Reliable, Efficient System Operation Provided by:
  1. Double-width, double-inlet, forward-curved Class I, AMCA rated centrifugal fan
  2. System that does not contaminate heated air with combustion by-products
  3. Operation of fan only in warm weather to enjoy free ventilation cooling
  4. Full-floating, stainless steel primary heat exchanger
  5. Multiple blowers on tubular steel blower shafts (on most models)
  6. Mounting and wiring of all necessary operating starters, relays, switches, safety controls and fuze
  7. Varible pitch drive pulley (up through 10hp)
  8. ODP motors with adjustable motor mounts
Long Lasting Construction Provided by:
  1. Rugged angle steel base frame on every unit section to withstand the rigors of shipping and handling
  2. Fabricated sheet panels that virtually eliminate rattling or rumbling
  3. Extra long life self aligning bearings sized for industrial duty
  4. White painted finish
  5. Double wall heat exchanger module
Ease of Maintenance Provided by:
  1. Modular designed sections
  2. Convenient access to heat exchangers and blower module for field service
  3. Optional service platforms on upright units
Other Options:
  1. Natural gas, propane gas or oil burners available
  2. Roof curbs and vertical stands simplify mounting
  3. Fresh air hood with bird screen helps protect against water entrainment
  4. V-bank filter section with disposable or cleanable filters for longer equipment life of internal components
  5. Motorized two-position inlet or discharge damper for exfiltration control
  6. Gas trains approved to FM, IRI, or other special code requirement
  7. Insulated and/or weatherized sections available for outdoor units
Controls' Options:
  1. Remote station with room or discharge thermostat for easy operation and remote temperature adjustment
  2. UL listed
  3. Audible alarm for flame failure
  4. Clogged filter indicator
  5. Service receptacle
  6. Unit-mounted on/off toggle switch

Discharge Options
Horizontal Unit /
Horizontal Discharge
Upright Unit /
Top Left Discharge
Upright Unit /
Bottom Left Discharge
Horizontal Unit /
Bottom Discharge
Upright Unit /
Top Right Discharge
Upright Unit /
Bottom Right Discharge
Horizontal Unit /
Top Discharge
Upright Unit /
Top Discharge
Upright Unit /
Bottom Discharge

LEGEND
OA - Outside Air
DA - Discharge Air
RA - Return Air
Optional Cooling Packages:
Evaporative Cooling

WEATHER-RITE™ IDF-Series evaporative cooling system is an economical cooling solution. It requires no air-cooled condenser, no chiller or cooling tower, no chilled water pumps or distribution piping/insulation, no major motor control center or electrical gear. Operating costs are a fraction of similar-capacity mechanical refrigeration system.

Evaporative cooling works when warm air passes over specially treated wetted media. The heat passes from the air to the wetted media, causing the water to evaporate and inside air to cool.

Mechanical Cooling

For situations requiring temperature and humidity levels lower than the performance parameters available with outdoor air alone or with evaporative cooling, WEATHER-RITE™ IDF Series offers a broad range of cooling options.

Cooling options can be added by simply installing coil sections equipped with the appropriate cooling coils and condensing unit or chiller. The versatility afforded by the coil section enables you to utilize DX refrigerant, chilled water or other types of cooling coils in your system.

Model Configurations
Make-up Air (MUA) Models
Design: 100% replacement air with a fixed discharge air volume.
Function: Supplies direct replacement air for building mechanical exhaust.
Application: Used as make-up air for industrial processes which incorporate mechanical exhaust.


Fixed Recirculation (FR) Models
Design: Manual modulation of outdoor air from 0% to 100% with use of mixing box and potentiometer.
Function: Provides efficient, low-cost heating where minimum ventilation rates are required.
Application: Used in warehouses, distribution centers, retail outlets, etc.


Air Management (AM) Models
Design: Automatic modulation of outdoor air from 0% to 100% with use of mixing box and pressure gauge.
Function:Automatically responds to building pressure and temperature needs.
Application: Used in industrial and commercial buildings that have air quality and specific air management requirements.

616 North 5th Street • Minneapolis, MN 55401 • 1.800.589.3691 • wr-sales@weather-rite.com