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Insulators Partner with The Heat and Frost Insulators are the original green energy specialistsconserving energy to our customers in Northeast Illinois and Northwest Indiana since 1899. Learn More About Mechanical Insulation Evaluations and Energy Audits Local 17Facility and Plant Managers See our list of contractors in your area to get your mechanical system insulated for the winterjQueryfunction jQueryulticker. liScrolltravelocity 0. 08 Facility and Plant Managers See our list of contractors in your area to get your mechanical system insulated for the winter ABOUT HEAT FROST INSULATORS Insulation around a buildings heating and cooling system is a vital resource that protects a facility from energy loss and physical damage.