Teleflex Energy (Power Systems Group) manufactures and markets the Proheat GEN4 Truck APU HVAC System and Proheat X-45 and M-Series diesel-fired auxiliary coolant heaters. The Proheat X-45 and M-Series are the Number One auxiliary coolant heaters in use throughout the North American truck, Off-Highway, transit bus and coach markets. GEN4 is the Number One distributed trucking APU HVAC system in use throughout North America. Proheat auxiliary coolant heaters deliver cold weather engine pre-heat and cab heat. They also reduce engine idling, reduce emissions, and save diesel fuel costs. The Proheat GEN4 APU HVAC System does all of the above and in addition provides in cab air conditioning and AC power.