nominal size air filters, actual size air filters, acutal size filter, nominal size filter
Around the House

What's the difference between nominal and actual sizes?

Air filter sizes can be a bit confusing without the right information. You may see a nominal size and an actual size printed on your filter border. Here's how to know which is the size to reference.

merv mpr and fpr filter quality
Around the House

What do MERV, MPR and FPR mean anyway?

Air filters are rated by several different metrics and systems, depending on a variety of factors. Second Nature makes filters easy by breaking these ratings down and utilizing one standardized metric-MERV.

finding air filter size
Around the House

How do I know what size filter I need?

We always want to make sure you get the exact filters you need, exactly when you need them.

dirty filter breaks hvac
Around the House

How will dirty air filters impact my HVAC system?

Dirty and clogged air filters reign havoc on your HVAC system. They will not only waste money on energy costs, but they will cause damage (sometimes irreparable damage!) to your HVAC system.