Most Efficient Diesel Truck APU on the Market! With over 18 years in production, the HP2000 APU has proven to be the most capable and reliable APU on the market, time and time again. The HP2000’s patented heat pump technology provides 20,000 BTU’s of both heating and cooling to the truck’s cab, providing our customers with year-round comfort without the need for an additional bunk heater like our competitors. Parks Industries LLC is focused on providing the absolute best in idle reduction systems to the transportation, construction, and military industries world-wide. Our vision for excellence shines through our hard-work and dedication to providing endless customer satisfaction with the quality of our products. Have questions about the HP2000 APU? Call our office at (618) 997-9608 or visit our website at www.hp2000apu.com.