The 1.5–5 ton GAM5 model features a high-efficiency four-speed ECM blower motor. The extraordinary American Standard^® ForeFront™ air handler represents a substantial advance in air handling technology. Using 14 industry-exclusive patents, ForeFront offers significant advantages over other air handlers, such as refrigerator-styled insulation made without exposed fibrous material, which virtually eliminates sweating and condensation as well as helping create a safer environment for your home.