This air filter can be used again

A few months ago, my 22 year old son bought his first house. He saved all through college, and managed to amass enough money for a small starter house. His Dad and I are very happy, because the new place is only seven miles from our house. It’s been great having Joey so close to home again. Joey bought an older 1950’s concrete block home. It’s about 1100 square feet, with two bedrooms and a bathroom. The garage had been converted into an office space. My son was able to pick up the house for next to nothing, because it was up as a short sale. After moving into the house, Joey and his Dad fixed up the flooring and repaired some roof damage. A few days ago, Joey called my husband to ask for help. He said the HVAC unit wasn;t working right. My husband went over to the house, to check on the HVAC equipment. My husband recognized the problem as soon as he removed the panel from the HVAC unit. Our son had been cleaning and reusing his air filter. Unfortunately, the air filter was not made to be reused. Since the HVAC unit claimed to have a reusable air filter, my son was cleaning it and placing it back in the system. The air filter was a disposable filter, and in poor shape. It was poorly constructed and filled with holes, dirt, and a thick, sticky substance. My husband took Joey to the hardware store, and helped him pick out new air filters for the system.