So far, the filter is working. It fits as it should. This is the first time I have used these filters and it isn't time to change it out. When I do the first change, I will know more about how it does.
I've recently had to convert my HVAC from a filter inside the unit to the filter going from the intake. It is filtering very well and the air is getting through like it should.
Been using these filters for several years. Good collecting dust and airborne particles. I like buying the filters direct and quantities that last for a year or more.
Have not used yet. Our furnace man said I had been the incorrect type of filter--making our furnace work harder than necessary--and told me to use a filter that was not as heavy.