By tapping the energy contained in off-gases instead of using steam, GHE units can cut evaporator operating costs to near zero or allow added evaporative capacity without increasing energy costs. In some cases, Dedert GHEs provide cost efficiency with waste-gas streams driving as little as 30 percent of desired evaporation. Existing evaporation systems require minimal modification for conversion to GHE systems. Waste-gas streams must have saturation temperatures above 140 F and must not be corrosive, fouling, hazardous or flammable. Custom designed for small to large capacities, systems typically are constructed of stainless steel, although higher alloys, fiberglass, PVC and a variety of materials may be used.
Dedert units conform to virtually all fabrication and inspection standards worldwide.