Hazardous Location Electric Unit Heaters

Hazardous Location Electric Unit Heaters – Explosion Proof Heaters for High-Risk Environments

In chemical plants, oil refineries, paint shops, dry cleaning facilities, and other classified hazardous locations, standard heaters are not safe. These environments contain flammable gases, vapors, dusts, or fibers that can ignite from sparks or high temperatures. Explosion-proof hazardous location electric unit heaters are engineered to contain ignition sources and meet strict NEC requirements for Class I & II, Division 1 & 2 areas.

At NorthStock, we carry a wide selection of hazardous location heaters and other HVAC products from the industry's leading manufacturers, including Berko, Chromalox, Markel, Modine, Norseman, QMark, and Ruffneck.

Example Heaters and Design Features

  • QMark GUX1500832 explosion-proof electric unit heater: Powder-coated heavy-gauge steel cabinet, explosion-proof motor with thermal overload protection, optional motors for Class I Group C and T3B applications.
  • Ruffneck FX5-208360-150 explosion-proof unit: UL-certified for Class I Div 1 & 2 Groups C & D, Class II Div 1 Groups E/F/G, T3B 165°C rating, thermally protected motor, optional 36–82°F thermostat.
  • Norseman XGB350T2C:Heavy-duty 16-gauge stainless steel casing, extra heavy wall tubular finned elements, patented x-Max housing with slide-out terminal block trolley for easier electrical connection, 30° tilt or 90° louver rotation for flexible airflow.

Accessories & Custom Options

Many hazardous area heaters, including the Chromalox CXH-A-30-43-32-40-20-EP, the Berko RUX750432, the Markel HLA 12-208160-3.0-24, and the Modine HEX5-208360-075, are offered with a variety of optional and required accessories. Depending upon the manufacturer and the unit, these options may include factory-installed disconnect switches, thermostats, pilot lights, wall or ceiling mounting kits, and arctic or moisture-resistant construction. These options and accessories may all be selected on the product page.

Frequently Asked Questions – Hazardous Location Electric Unit Heaters

1. What makes electric unit heaters different from convectors in hazardous locations? Unit heaters are fan-forced (forced-air) models that circulate large volumes of air quickly for rapid heat-up and wide-area coverage (high CFM, temperature rise). Convectors use natural convection (no fan) for quieter operation but slower heat distribution. Unit heaters are louder due to the explosion-proof fan motor but ideal for large open spaces like warehouses or processing areas.

2. What CFM and temperature rise can I expect from these unit heaters? CFM (cubic feet per minute) and temperature rise vary by model and kW rating. For example:

  • Ruffneck FX6 series: up to 1,000+ CFM with 50–100°F rise depending on kW
  • Chromalox CXH series: 500–1,500 CFM with adjustable louver direction Check product specs for exact airflow and rise

3. Are the fan motors explosion-proof and how long do they last? Yes — all our hazardous location unit heaters use UL-listed explosion-proof motors (TEFC – totally enclosed, fan-cooled) with thermal overload protection and permanently lubricated ball bearings. Typical lifespan is 10–20+ years with proper maintenance. We stock many replacement motors for quick service.

4. Can these unit heaters be used in high-ambient-temperature environments? Many models are rated for ambient temperatures up to 40°C (104°F), with some (e.g., Ruffneck FX series) handling higher with optional features. Always verify the T-code and ambient rating on the product page.

5. What mounting options are available for unit heaters? Most models support flexible mounting:

  • Wall brackets
  • Ceiling suspension (pipe or chain)
  • Pole mounting

6. Do you offer accessories like thermostats or disconnect switches? Yes — many models are available with optional factory-installed:

  • Explosion-proof thermostats
  • Disconnect switches
  • Pilot lights
  • Control panels

See product pages for options or ask us to quote a configured unit.

7. How fast can I get a hazardous location unit heater shipped? Custom or special-order units typically take 2–8 weeks. Accurate lead times are shown on each product page.

Why NorthStock?

  • Same-day shipping on in-stock items (3 PM ET cutoff)
  • Free ground shipping to lower 48 states
  • Volume discounts on large orders
  • Earn Pro Points on purchases — redeem for discounts
  • Experienced support - we have been selling hazardous location electric unit heaters for over 20 years!

Browse our selection of hazardous location electric unit heaters, search by model number, contact us, call us at 877-301-4660 or send sn email tocustomerservice@northstock.com for a fast quote. We’re your reliable partner for safe, certified heating in hazardous environments.

(Updated March 2026)

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