Q: What is best a 1-Cylinder engine or a 2- Cylinder engine?
A: A 1-Cylinder engine has to operate at a high 3600 RPM to provide necessary HP to operate system. These high RPM's shorten the longivity of any brand of engine compared to a 2-Cyliner engine turning 2700-2800 RPM.

Q: Why use a Automotive 134a A/C Freon system vs a 115V A/C System?
A: Both systems will work and provide cool air. Unfortunately anything mechanical could some day require repairs. The automotive 134a system can be repaired at any automotive or truck repair shop. Parts can be found at local parts stores at a discount price regardless of you location. Try finding parts even a discount price or repairs for a 115V system while on the road.

Q: What is the best cooling system a seperate radiator or connecting to the truck cooling system.
A: Connecting a APU unit to the truck cooling system creates several potential problems. (1st) in the event a problem occurred in the truck system the APU unit could not be used while waiting for the HOOK or or waiting on repairs. (2nd)In the event the truck or APU system became contaminated it contaminates both systems. Now there is extra expense to repair 2 systems. (3rd) Connecting to truck cooling system puts more connections into a common system to increase the possibility of a leak or hose failure. That is why our units have their own radiator for cooling.