APU Evaporator Fan Mod

I drive a Kenworth T680. I’ve got a Tripac Evolution. I’m regularly in very warm climates and I’m not happy at all with the low volune of air flow from the wall vents coming off evaporator fan. I could care less about the vent that they installed near the floor and honestly it’s about to freeze my leg off anytime i’m sitting at the table.

I was wondering if anyone has tried tying the two outflow tubes together with a standard 4” “Y” splitter into the wall vent system to double the airflow to wall vents and eliminate the floor outlet?

 

Yeah, I don’t really understand the logic in blowing a bunch of cold air on the floor of the truck.

 

So in the evaporator box, there’s a motor with two fans attached to it. These fans pull air through the evaporator box into two separate outlets of 4” ductwork. One 4” duct goes to the floor vent (with very high volume). The other 4” duct feeds into the wall vent system, dividing to all 4 wall vents with very poor volume. So if I shut off the floor vent (it does have a little flap i can close), it just closes off output from that fan/duct going to it but doesn’t increase volume to the other separate duct. That “Y” I was talking about rerouting the floor duct and wall duct into a “Y” before they enter the wall vent system…hopefully doubling the force/volume of air fed to the wall vents.

I am going to try it and I’ll post before/after pics and results. Just don’t get too judgy on all the crap I got in my “basement”….lol