Aeration
Heaters
Heaters, designed to work with the Axial or Centrifugal Fans, create a complete drying system.
Unlike some drying systems, Caldwell units ship separate.
Product Features
- Every Caldwell gas heating unit is designed for peak fuel efficiency, a virtual energy miser to keep per bushel grain drying costs to a minimum.
- Caldwell gas heating units with multiple fuel capability, and a wide range of BTU production, permit varied methods of operation without costly down time and equipment modifications.
- Caldwell gas heater units are designed to use liquid propane, natural gas and vapor propane.
- Two year standard limited warranty covering all elements of the product. (See Warranty Policy)
- All units are 100% factory stress tested under simulated field conditions to assure trouble free operation.
- Caldwell heaters are manufactured in a separate galvanized housing from the fan allowing easy bolt together installation and serviceability. The same heaters are designated to be used with either axial or centrifugal fans, enabling more flexibility. Heaters utilize a galvanized control enclosure.
Product Applications
- Heaters are used in conjunction with fans as a component of a complete drying system such as in Bin Batch or In Bin Continuous Flow applications.
- Heaters should be applied to as system at as low a static pressure as possible, so the fan is delivering as high an air volume as possible. The drying rate is based on the volume of air the fan delivers; therefore the application of an axial heater or a downstream centrifugal heater to a rating of 25 HP should be to a maximum 3” static pressure.
- When using a heater, keep the area below and above the floor free of fines and trash. This will reduce the chance of fire.
- Heater models are available for Axial, Centrifugal and Inline Centrifugal Fans.
- Heaters are CSA Listed and have been field tested in Ontario and are proven to work in our fall drying season conditions.
- Accessories
- Modulating Valve: This control is used to maintain the temperature in the bin plenum at a constant temperature. The burner remains on at all times, and the modulating valve controls the amount of gas being supplied to the burner.
- Thermostats and Humidistat are available to be used as tools to regulate the drying temperature in the plenum.