Save on heating/cooling costs by maintaining your air filter. A heating system repairman told me to use the cheapest, blue filter, and to change it at least monthly or when soiled. He told me this would let the air conditioning motor work much more easily, saving electricity and extending the life of the air conditioner.
If you have a 14x20 inch opening, you can buy a 30x20 inch filter and make 2 from them. Get the wire-supported corrugated white filter. Cut the supporting cardboard at 15 inches. Cut the filter to size, and fold the cardboard supports back 1 inch to support the filter. Make sure the edge meets the opening. Now you have 2 filters.
PLEASE, consider WHO told you to use the cheapest filters. It's NOT a good idea to cut corners in that area because it allows too much dirt and dust into your system,as well as your home, thereby shortening the furnace's life and giving the furnace company more repeat business.
More dust/dirt into the atmosphere of your home is unhealthy, and it WILL take it's toll on your health sooner than you think. Cut corners some other way, unless you have no other choice, because you WILL make up the difference between the cheapies and the better FILTRETE filter, as an example, cost by SAVING RX, over the counter MEDS, and trips to the doctor because while your body was having to work overtime to fight the pollution you've forced it to breathe, it's immune system is compromised and weakened so that you are more easily able to get ill. Don't go whole hog and buy the VERY expensive filters, but don't settle for those blue thin useless ones either, regardless of who claims they're "just fine". Although they do filter SOME particles/ dust/ pet hair, etc. over time, the mid-range accordian pleated white filters are about ten times more effieient at filtering harmful bacteria and viruses from the air. You should reconsider and bite the bullet for a wiser choice that should cost around $5.99 for most sizes.
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