Sterling Unit Heaters and Duct Furnaces are a complete heat generating and distributing plant, equipped with automatic controls, and packaged in an attractive streamlined housing. Designed for ceiling mounting, they provide a convenient, low-cost method of heating stores, factories, warehouses and other large open areas comfortably.          Indoor Product Line >>

Indirect fired make-up air systems are available in multiple configurations, based on Standard and High CFM Blower cabinets designed to be mounted on a common heavy duty skid rail with up to three gas-fired duct furnaces. Other cabinets include downturn plenums, coil cabinets with factory installed coils, filtration cabinets and evaporative coolers. Multiple factory installed gas and air controls are available including: DDC control packages, electronic stage controllers, building pressurization controllers, and a variety of mixed air controllers.          Engineered Product Line >>

The Sterling Direct-Fired product line includes indoor and outdoor models that can provide up to 14 million BTU's and 100,000 CFM. Units are available with chilled water, DX (refrigerant) and evaporative cooling options.
Direct-Fired Product Line >>

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Indoor Duct Furnaces

Sterling Indoor Duct Furnances are 80% efficient and are designed for ducted air applications. These are typically built up systems using a separate air moving device and may be heating only or heating and air conditioning applications. All Sterling duct furnances are CSA certified for installation upstream or downstream from cooling coils (stainless steel heat exchangers are recommeded).