About Us


Parks Industries LLC is the sole manufacturer of the HP2000 Auxiliary Power Unit, based out of Marion, IL, USA.

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.


Randy Foutch (Sales): 618-215-3735, randy@hp2000apu.com
Holly Jones (Parts/Warranty): 618-215-3731, holly@hp2000apu.com
Chelsey Trammel (Parts): 618-215-3736, chelsey@hp2000apu.com
Shirley Lott (Accounting): 618-215-3734, shirley@hp2000apu.com

01. Our Vision

Parks Industries LLC is always on the cutting edge of technology, serving as the forefront of new innovations. We are constantly looking ahead at ways to improve the HP2000 to make it more efficient, durable, and economical for our customers. Our vision is focused on being the best at what we do and our product shows it.

02. Our Mission

Parks Industries LLC strives to provide the very best idle reduction system available by providing a great product and firmly standing behind it.  We strive for 100% customer satisfaction by treating each and every customer with respect and dignity, and offering them our full support to accommodate them in any way possible.

03. Our Value

Having a fleet of his own in the past, our owner, Gary Parks, knows the struggles of owning and maintaining a truck, and the value of a dependable APU.  He has worked extensively with his suppliers to source the very best, yet most economic, parts available in the manufacturing of the HP2000, providing all of the features of other APUs, while costing thousands of dollars less, weighing a minimum of 100lbs less, and capable of fitting into more confined spaces.  Finding the best product for your money is what everyone strives for, and when it comes the APUs, it just doesn’t get better than the HP2000.

04. Expanding Goal

Without a goal, how do you know where to aim? Parks Industries LLC is always looking ahead and setting new goals to achieve. Since our first unit was sold, our goal has always been to be the best, and provide the best product for our very deserving customers. And through the guidance of their feedback, we have been able to not only improve our system, but to also exceed their expectations within it. So with each and every year, we have successfully made our product smaller, lighter, more fuel efficient, and more user friendly, perfecting our HP2000 APU one step at a time.


The first prototype was put into testing. It was huge at over 34” wide and consumed about 0.3 gallons of fuel per hour.  At the time, it was still much less than the 1.1 gallons per hour that the truck would consume idling.  It was powered by a one cylinder engine and was extremely loud.


The unit was reconfigured to a smaller cabinet and the HP15 was born. It contained a Perkins engine which reduced the fuel consumption down to 0.15 gph.  The cabinet width was narrowed to 24” the engine noise was drastically reduced.


A new cabinet design, down to 21” width, and some internal component changes birthed the very first HP2000.  This cabinet design with it’s signature diamond plate lid would turn out to be the first version to be recognized as a major player in the APU market.


With the change of the engine from the Perkins to an overhead cam, 2-Cyl. Kohler engine, the HP2000 K-Series was born. The K-Series now offered a 345 lb total weight and was only 69db, making it one of the lightest and quietest APU in today’s market.


The HP2000 Xtreme was the next in line, with a new, sleek cabinet design, larger lid for easier access of servicing, and a new weather strip to help prevent the elements from entering the cabinet. This new patent-pending design was also the first to offer an interior cabinet light, allowing the HP2000 Xtreme’s logo to illuminate through the cut out in the lid while operating.


The HP2000 transformed to the HP2000 Xtreme Slim, with a narrowed cabinet extending to only 18”, allowing for additional technology to be implemented to create a significant increase in BTU rating. With 20,000 BTUs in both heating and cooling, it’s the highest BTU rated APU on the market. Other additions include an automatic belt tensioner and the option of a stainless steel cabinet.


Following in the foot-print of the HP2000 Xtreme, the HP2000-3 Xtreme rolled out with a 3-Cyl. Perkins engine, while keeping the same, compact dimensions. Using a 3-Cyl. engine cuts noise level down and while also decreasing vibration.  This unit came standard with a 120 volt alternator and a stainless steel cabinet.


The latest HP2000 Xtreme now comes fully packed with a new 2-Cyl. Kubota engine, using the same dimensions as its immediate predecessor, but now with a 60 amp alternator. Our newest APU is now even quieter at 65 dba, plus it has the lowest amount of vibrations of all of our units, and on top of that it is the lightest APU on the market coming in at only 310 lbs totally installed.


Reaching perfection is not always easy, or done quickly. But with a few some new modifications and the re-introduction of the powerful 2-Cyl. Perkins engine, we have been able to increase our products quality and durability, while maintaining it’s light weight and compact size, and decreasing its maintenance cost.


With the 2-Cyl. Perkins proving to be the most sufficient, reliable, and capable engine in its class, it’s now the only engine to represent the 12V HP2000 APU. Topped with an updated heat pump system and top-of-the-line controller software, our system is more durable and user-friendly.