industrial portable unit heater

King’s PKB-FM portable unit heater is constructed to hold up to the rigorous demands of jobsites or industrial facilities. Constructed to hold up to the rigorous demands of a jobsite or industrial facility. It is the best heat source to assist in dry-out applications where dry electric heat is preferred to propane or kerosene space heaters. In addition, electric heat has no odor, flame or carbon monoxide. The high CFM and low temperature rise are also key features to make the PKB-FM the best solution for temporary large capacity heating applications. Spiral finned steel elements and high CFM ensure even air distribution producing cooler element operation, prolonging heater life.

  • High Mass Steel Fin Heat Exchanger
  • Built-in Thermostat (40°-100°F)
  • Adjustable Louvers
  • Top & Front Carrying Handles
  • 4 Heavy-Duty Rubber Feet
  • Stackable Design
  • Assembled w/ ¼-20 Bolts For Extra Durability & Easy Serviceability
  • Durable 20-Gauge Steel Enclosure
  • Long Life Unit Bearing Motor
  • Patented Smart Limit Protection®
  • Fan Only Switch
  • Non-Mercury Tip Over Switch
  • 6ft. SO Cord (no plug)
  • Proudly Made in the USA with U.S. & Global Materials
  • 2-Year Limited Warranty

Product Features

A Warm Worker Is An Efficient Worker.

Fight mother nature with portable electric heat. A study from Cornell University revealed that increasing the working environment temperature to warmer thermal zones can save employers significant money by reducing errors and improving employee focus. When one company increased working temperatures by less than 10°, the productivity gains amounted to saving 12.5% of their wage costs per worker.

Now That’s Smart!

Spiral Steel Fin Heating Element For Maximum Heat Exchange

The metal sheath element is copper brazed with spiral fins then molded into a coil configuration. This combination produces the heat transfer while eliminating the potential for hot spots by positioning the element in the maximum airflow stream.

Available Models

Ordering Information

PKB2005-1-T-FM517.1120824600A8/3Buy Now
PKB2007-1-T-FM7.525.6120836.1600A8/3Buy Now
PKB2405-1-T-FM5/3.7525.6/19.21240/208*20.8/18.0600A8/3Buy Now
PKB2407-1-T-FM7.5/5.625.6/19.21240/208*31.3/26.9600A8/3Buy Now
PKB2415-1-T-FM15/11.2551.2/38.41240/208*62.5/54.1925B4/3Buy Now
PKB4805-1-T-FM3517.1148010.4600A14/3Buy Now
PKB2005-3-T-FM517.1320813.9600A8/3Buy Now
PKB2007-3-T-FM7.525.6320820.8600A10/4Buy Now
PKB2015-3-T-FM1551.2320841.6925B6/4Buy Now
PKB2020-3-T-FM2068.2320855.51100B4/3Buy Now
PKB2405-3-T-FM5/3.7525.6/19.23240/208*12.0/10.5600A12/4Buy Now
PKB2407-3-T-FM7.5/5.625.6/19.23240/208*18.0/15.5600A12/4Buy Now
PKB2412-3-T-FM12.5/9.442.7/32.03240/208*30.1/26.1825B8/4Buy Now
PKB2415-3-T-FM15/11.2551.2/38.43240/208*36.1/31.2925B6/4Buy Now
PKB2420-3-T-FM20/1568.2/51.23240/208*48.1/41.6925B6/4Buy Now
PKB4805-3-T-FM517.134806.0600A14/4Buy Now
PKB4807-3-T-FM7.525.634809.0600A14/4Buy Now
PKB4812-3-T-FM12.542.7348015.0825B12/4Buy Now
PKB4820-3-T-FM2068.2348024.01100B10/4Buy Now

* Dual rated heaters will draw 13% less amps and 25% less wattage when operated at 208V. * 2-Stage heating standard.

Factory Installed Options

-25C25 foot cord option


PKB-SB30417Optional 6" Base, No Wheels

Engineering Specs

Contractor shall supply and install PKB-FM Series electic unit heaters manufactured by King Electrical Mfg. Company. Heaters shall be of the wattage and voltage as indicated on the plans.

Construction: All exterior and interior metal enclosure parts are made from 20 gauge electrogalvanized Steel with a rust inhibiting baked enamel finish. Smooth rounded corners and protective edge trim give an attractive modern appearance.

Built-in Thermostat: Single pole factory installed hydraulic capillary tube thermostat for precision heating control. Operating range 40° to 100

Fan Only Switch: Comes standard with fan-only switch.

Rear Intake Screen: Heavy gauge steel screen protects against foreign objects making accidental contact with the rotating fan blade.

Spiral Fin Elements: The metal sheath element is copper brazed with spiral fins then molded into a coil configuration. This combination produces the best heat transfer while eliminating the potential for hot spots by positioning the element in the maximum airflow stream.

Totally Enclosed Fan Motor: Permanently lubricated long life, unit bearing with 20cc of oil. Epoxy-coated motor with enclosed rotor resists moisture and corrosion for long-lasting, trouble-free operation.

Aluminum Fan Blade: Axial flow-type fan mounted directly to the motor shaft for maximum efficiency.

Thermal Overload: Heaters shall be equipped with King’s patented thermal overload Smart Limit Protection®, which disconnects elements and motor in the event normal operating temperatures are exceeded. If thermal overload trips due to abnormal operating temperatures, thermal overload shall remain open until manually reset by turning the heater off for 15 minutes. Automatically reset of thermal overloads, which allow the element to continue to cycle under abnormal conditions, will not be accepted.

Cord Length: 6 Foot SO Cord (No Plug Provided)

Approvals: cETLus ( 517271) & (30314521)