How numerous air filters do I get in a case?

I called the Heating and A/C business Last year because I wanted to buy a case of air filters for our oil furnace and a/c unit.

Before I purchased the air filters, I wanted to know how numerous air filters were in the case.

I understood I was getting a good price by buying them by the case, although I had to make sure I had some place to store them. The Heating and A/C tech assured me I could store them in the garage or in the basement. As long as they didn’t get wet, they would be fine. It wasn’t whether they would get wet, however if I had the room for 2 cases of air filters. He said the air filters had twelve in a box. At least now I had some method how much room I needed for the air filters. I started looking in the garage and the shed, hoping to find a shelf that would hold 2 cases of air filters. I found a shelf in the basement where I could put the oil furnace air filters, although I couldn’t fit the A/C unit air filters there. Then I realized I could put them in the laundry room. The laundry room was in the mudroom, and the a/c unit was right outside the mudroom. At least I had solved the complication with where I was going to put the air filters. Now I just had to m tell the Heating and A/C tech what kind of air filters I needed. I would need to check the old air filters and supply him the numbers that were on them.
air filter