Has no cabin filters. i had to clean the evopprater under the dash to get a lot better air flow it was clogged up with dust and other stuff sucked in from outside. since i had to take the lines off to get it out had it vaccummed and new 134 added. shop added exactly what freightliner suggests. on normal it blows around 50 degree air out but if i put it on recirculate it will blow 40 degree steady