Pre-2017 Super Duty HVAC Air Inlet Filter

[Keith Browning]

I am actually working on a 2021 F750 that is a tree service truck and like many I have had in the shop, there is sawdust plugging up the heater and evaporator cores. 2021 medium duty trucks still use the 2011-2016 style dash and therefore no pollen filter. I have run across this with landscape trucks as well. The air inlet in in the cowl just underneath the PCM. Remove the PCM and there it is. I was wondering if anyone else has tried perhaps applying a screen somehow to the inlet to catch organic crap. I'm looking for an option for these customers. Accessing and cleaning that inlet is easier and less expensive than replacing your heat exchangers every couple of years.