I've had this on again off again mental debate concerning our furnace filter. It's the usual 20x25, and I get the upgraded pleated version, vs the plain fiberglass version.
However, in my mind, the pleated version restricts the air flow more so than the fiberglass - nature of the beast.
SO - when it gets really hot in the summer, or below zero in the winter - I temporarily pull the air filter out for max air flow...
Now, not sure why exactly.... thinking of pushing more "treated air" into the ducts & house. BUT - does it make any sense ?
Since the air stream is going faster across the heat exchanger (winter), or the A/C A-coil (summer) maybe the air outflow is higher but the temperature is not at the max.... I'll have to take a test run with my IR kitchen therm and point at the duct vent.