I brought this to put in my Freightliner Classic to cut down on idling.. And for the price comparison to a wabesco or espar heater this thing is just as good for a third the price, it's actually the same unit just sold as the big brands to charge you 1200 to 1500 bucks... The only down side for me being in the US is the control panel only reads in Celsius not Farenheit.. If someone has a update for it please let me know, other wise you have to Google your temps and write them down on a piece of masking tape.. but I do recommend for sure, It took me about 2hrs and this thing was breathing fire, I had one piece missing for the duct work but didn't stop me from installing and getting it working, it took about a month and a half to get the missing piece, but like I said it didn't stop it from working... I hope this helps buyers with making a decision when your looking for a unit for heat. I'm saving at least 200 bucks a week from idling my thirsty Cat engine!!!Update I have had to use my heater several times in the last month because of early cold weather and she is still cooking, I brought a different truck since my first review and let the other unit go with the truck and the buyer called me and thanked me for installing the heater in that truck.. If you want to save on fuel and save on down time with these newer def trucks because most people don't bump up the idle on there break to allow there trucks to regain, it leads to clogged regin filters and check engine lights and engines going into derate which all leads to down and shop time... Keep it moving with a bunk heater... And also remember in temps of teens and signal digits you have to idle anyway and when you truck temps aren't putting out the heat you need you can still run this heater and stay toasty...