These are high quality units incorporating an extra long, large surface area, SS engine heat exchanger and electric incoloy steel heating element with an adjustable thermostat. They incorporate a pressure relief/non-return valve which also acts as a drain for seasonal decommissioning.
Orientation: horizontal design, but works well in any orientation
316 stainless steel tank, argon welded for corrosion resistance
304 stainless steel case
Heat exchanger is a thick walled (1/16"), coiled 10 ft. tube of 316 stainless steel, so it won't compromise the engine cooling system
Insulation is 2" of high density polyurethane foam
SS mounting brackets included
All units are 1200 watts; 110 VAC (220 VAC available by special order)