Heatrex 234 Series

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. Advantages include : 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 […]

233 Series Explosion-Proof Unit Heater

Heatrex 233 Series Explosion-Proof Unit Heater

Heatrex’s 233 Series EXP explosion-proof unit heater is designed with both safety and versatility in mind. Unique 233 Series features include: Industry’s Lowest Ignition Temperature Code Rating : T3C, 320°F (160°C) Dual Over temperature Protection: With both automatic and manual reset over temperature cutouts for additional safety. Nontoxic Propylene Glycol Heat Transfer Fluid Low 70 […]


Heatrex, A One Stop Shop For all Your Heating Needs.

From its beginning in 1959, Heatrex has held the belief that good communication, employee education, attentive customer service and the attitude to excel are the primary ingredients in the manufacture of superior products. Heatrex commits its future to continually provide quality products and performance to its customers. The engineering team at Heatrex utilizes the latest […]

Watt Density

Watt Density & Sheath Selection

Watt Density Watt density is one of the most critical factors affecting element life. Watt density, expressed in watts per square inch of heater surface area, determines the heater operating temperature for a given set of conditions. The sheath temperature of an electric heating element should be limited to provide a reasonable heater life and […]