I used this for my semi truck I'm an over the road driver so cabin comforts are important. 1 I found this unit easy to install even without receiving any instructions, and it has preformed beyond my expectations I have used it for 2 knights so far and on its highest setting it will run you out the truck I found the 2nd to lowest setting is best. 2 I only wish it came with instructions and a user Guide. 3 It was shipped really fast. Good job to the seller Thanks.