The filter that came with my new Carrier Infinity system is so thin that I can almost read the newspaper through it. I was told that any filter for this unit must have a metal frame because there is a spring clip at the back of the tray that holds the filter and any disposable filter with a cardboard frame will be crushed? Is this true?
While I understand the need to be careful about too much static pressure, I would like to try a disposable filter that might catch somewhat more dust and irritants. Of course, I need to get custom filters made since the size that I require (21 12 x 19 7/8 x 1) is non-standard.
Also, does anyone know of any good reusable filters with a metal frame? The only ones that I know of are made by a company called Dust Free, in Texas. I had one of their filters with my old equipment and found it so-so at best.
I don't have room in my installation for one of the larger filters from Carrier that only gets changed once a year.