I've been struggling to understand air filter sizes and the frequency of changing them out.
We have a Rheem 4 ton AC unit. Below is the filter (20x25x4) we currently have in our attic and some info from our warranty registration.
- How frequently is it recommended to change this filter? These are fairly expensive (compared to a different place where I only used 1in depth filters) and some say to change every 3 months which adds up. I suppose it depends on several factors, but we live in Texas and it's just 2 people, no pets.
It seems like I should just check it visually to see if it's ready to change - I can see this lasting easily over a year. Please correct me if I'm wrong.
Model Serial Registration Date Install Date RA1648AJ1NA 16 SEER CUBE A/C - W221838882 8/9/2018 8/8/2018 R801TA075421MSA 80+ UPF GAS FURNACE RHEE - W221845259 8/9/2018 8/8/201