One of my least number one responsibilities is my Heating & Air Conditioning system. I never knew how much time & effort went into taking care of an Heating & Air Conditioning system before I purchased my first house. I thought my greatest responsibility would be mowing my grass, however I hastily discovered just how wrong I was. I have to pay an Heating & Air Conditioning professional to come maintenance my Heating & Air Conditioning system at least twice per year & I have to remember to replace my air filter more than that. The air filter is the worst, because I never seem to have a clean air filter when I need one the most; Remembering to replace my air filter is already a stretch, so when I finally do remember to do it, I expect to have clean air filters on hand. For some reason, I never seem to have one. I was getting my air filters from the local hardware store because they came in a two pack & I thought the price was okay. However, when I went to replace my air filter the last time, I didn’t have one on hand & I didn’t have time to run to the hardware store. Instead, I decided to order a pack of filters online & have them delivered. I would replace it as soon as they were delivered. When I went to checkout, I realized that they had an opening to subscribe & save 5% on every order. They would supply current air filters to my property however often I wanted & I’d save 5% just for subscribing. I would never forget to replace my air filter anymore!