| 90 Watts Per Square Inch For heating clean water only in commercial and/or residential applications. Element life is sacrificed in favor of a low initial heater cost. 60 and 45 Watts Per Square Inch Industrial water heating - many aqueous solutions which are compatible with steel and Incoloy. 23 and 20 Watts Per Square Inch For heat transfer oil, cleaners, high temperature air and gas heating. 15 and 12 Watts Per Square Inch For lubricating oils, medium viscosity oils, high temperature air and gas heating. 8 and 6 Watts Per Square Inch For #5 and #6 fuel oil heating, viscous materials, raw crude oil, residual oils, high temperature air and gas heating. 4 and 2 Watts Per Square Inch For asphalt and other hard-to-heat substances, extra high temperature air and gas. STANDARD FEATURES Heating Elements Incoloy 800 Sheath Material Heavy Wall (.035 in.) Large diameter (.475 in.) Sealed Terminals
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