234 Series Washdown/Corrosion Resistant Unit Heater

The Heatrex 234 Series unit heater is the perfect solution to the problem of heating people or equipment in non-hazardous environments where moisture and corrosion exist.

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Standard Features

Built-in Controls
All necessary safety and temperature controls are included in a single package. Components and motor are factory-wired to a single terminal block for field wiring, eliminating the chance for field error and reducing installation costs.

Single Point Electrical Hook-up
Heater, fan motor and controls are all connected to the same branch circuit.
Corrosion Resistant : Stainless steel construction, epoxy-coated aluminum fan blade and nonmetallic NEMA 4X terminal enclosure resist corrosion found in sewage treatment plants, swimming pools, car washes, paper mills and marine installations.

This watertight construction can be hosed down without disconnecting the heater, which makes it ideal for coal handling areas, steel mills, foundries, ships, wood finishing plants, cement, sand, grain and food processing facilities.

Standard Construction Features

Heating Elements
Industrial grade, Type 316 stainless steel finned tubular elements with stainless steel fittings, manufactured by Heatrex.

Fan Motor Assembly
Totally enclosed, UL Recognized motor with permanently lubricated ball bearings for longer life. Designed to resist moisture and corrosion. Factory-wired to NEMA 4X enclosure. Fitted with an epoxy coated, aluminum fan blade suitable for corrosive salt spray environments.

Heating elements and motor are enclosed in a round, heavy 16-gauge stainless steel shroud.

Inlet/Outlet Grilles
Adjustable, stainless steel, louvered outlet grille can be rotated 90° to direct airflow up, down, left or right. Heavy gauge, stainless steel rear grille protects against accidental contact with the fan blade.

Control Enclosure
The non-metallic enclosure, which houses the element terminals and built-in controls, will not rust and meets NEMA 4X hose-down requirements.

Built-in Controls
Include automatic reset over temperature cutout, fan delay relay, controlling contactor (when required), transformer for 24-volt control circuit, terminal block for field wiring and a separate motor contactor for heaters above 12 kW.

Mounting Bracket
The heater comes complete with a stainless steel swivel mounting bracket which can be used either for wall or ceiling mounting. Four field supplied 3/8-16 threaded rods can also be used for ceiling installation.


Car Washes
Cement Plants
Coal Handling Areas
Food Processing Plants
Marine and Offshore
Power Generating Stations
Steel Mills and Foundries
Swimming Pool Areas
Wastewater Treatment Plants

Closed Tank Heating

Watt Density

Percentage of Wattage

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