Process Heating Company's Lo-Density electric heat solutions provide unique benefits over fossil-fuel-fired heaters and direct immersion electric heaters. Our unique drywell-style heaters dissipate controlled heat as low as three watts per square inch on the heater's sheath to prevent coking or damaging of temperature-sensitive materials. Compared to the inefficient burning of fossil fuels, electric heat is safe, consistent, environmentally friendly and 100% efficient because all of the energy is used to heat.