I have been using these for years and loved them, till now. With this last package, we had issues with too much air flow restriction causing whistling and a louder, stronger air pull demand. Upon calling the Heating/Air service out, they advised that these pleated filters were the cause and to stop using them. Apparently there is no regulation for air flow and they have been advised by their (name brand) dealer to advise against using these.

Great filters

Great for the price

Used them for years.

grate value

Excellent product

right size...right price

Price for filters

NA

Strong material.