LS-Series Heaters

Over-the-side L-Shaped Immersion Heaters for the Process Heat industry

L-Shaped heaters are ideal for immersion heating of open tank applications. Designed to rest on the bottom of the tank they are sometimes called “drop in” or “bottom heaters”, L-Shaped heaters put the heated portion at the bottom of the tank. Standard and custom sizes available with optional sheath materials, kilowatt ratings and watt density, to suit heating of water-based solutions, oils, degreasing tanks, solvents, salts, caustic solutions, paraffin and freeze protection for storage tanks. Terminal enclosure options for indoor and outdoor, hazardous and non-hazardous environments.


Terminal enclosure

Rugged NEMA 4 (6`` X 6`` X 4``) moisture resistant, painted steel terminal enclosure allowing easy access and installation.

Convenient Connection

Terminal block comes standard inside terminal enclosure and 1`` NPT hub, for more secure and convenient wiring.

Sludge legs

Two Inch Sludge Legs help keep the elements free of sediment build up.

Element sheath material

Element alloy available: 304 Stainless Steel, 316 Stainless Steel, Incoloy 800, or Titanium.

Other wetted surfaces

All wetted surfaces either  316 Stainless Steel or Titanium.

Wattage and Voltage

Available in both single and three phase, 120 to 600 Volts. Wattages to of 1 to 50 kilowatts (within amperage constraints).


Element Configurations

Available in 3, 6, 9 and 12 element configurations so you can fit the maximum wattage you need in the space available. Element lengths customizable to fit in the space available.

Explosion Resistant Terminal Enclosure Option

Vertical Stacked Elements

A space saving design that puts the heater on the side of the tank, not the bottom.

Integral Thermowells

Built-in single and double-pole thermostats are available. These can be wired in-line with the heater where amperage allows. Otherwise available pilot duty for convenient control of the heater and solution temperature.

Gooseneck Horizontal Extension

For moving the terminal enclosure away from any vapors coming out of the tank.

Expert assistance available for designing your Custom L-Shaped Heater

We are happy to help you design a heater that meets your applications unique requirements.

Speak with a L-Shaped Heater Design specialist today.


Almost 70 Years

Heatmax History

Founded by an ex-Navy engineer, George Strokes, the company got its start making quartz immersion heaters in Euclid, Ohio in 1952.

George called the company Glo-Quartz®.

Growing rapidly he moved the company to bigger premises in Willoughby and then Mentor. Other factories were opened in Pasadena, California (now closed) and then Tucson, Arizona.

Tom Strokes took over leadership of Glo-Quartz in the mid-70s and moved to roll reduced metal heating element range.

A final legacy, Tom launched a new brand name, Heatmax Heaters, in 2020. The new brand name both better represented the wide range of products we make and challenged the common perception that we were quartz heater specialists only.