Heating and Air conditioning Filters

Hello homeowners and future homeowners. I live in the Midwestern part of the United States. I realize that not all climates are like the climate I live in. Thinking about who might be reading this blog, my first thought is it will probably be limited to those who read English.  Of course, with today’s translation technology, who knows? Anyway, this blog is directed to homeowners who have a central heating and air-conditioning system. In contractor lingo, it’s called HVAC.

As I write this, I thank God for Skip because the truth is, I am clueless about so many aspects of homeownership. Believe me, I am learning about all this right along with you. Why is it important to change your HVAC filter? It extends the life of your furnace/air conditioner and it increases the air quality in your home. A dirty air filter makes your furnace/air conditioner inefficient and it reduces the air flow of your furnace/air conditioner.  Hmm, yeah, that would be important. (You think?)

Skip says the HVAC filter should be changed every 6 months. If there are dusty conditions where you live, then you should change your filter every 4 months. Where is the filter? For homeowners who have a furnace and an air-conditioner, it’s located in the furnace. For homeowners in warm climates who use a forced air air-conditioner, it’s located in the forced air unit, which looks somewhat like a furnace. If you really want to know more about a forced air unit, Google it.

How do you know which filter to buy? O.K., you’ve found your furnace and/or forced air unit. When you pull out the air filter, the size of the air filter will be written on the outside of the filter.  I asked Skip if there are different qualities of filters. He said there are standard filters and HEPA filters. HEPA stands for High Efficiency Particulate Arrestance. I’m one of those people that would spend the money and purchase the higher efficiency filter because I always figure, more is better. If you want to learn more about it, Google it.

Skip also started to tell me about making sure the arrows on the filter are in the correct direction when installing the new filter. I said, stop!!! This is not a how-to/fix-it blog.  If you don’t think you can figure it out by yourself, here are my standard suggestions. Ask a handy friend to show you how to change your HVAC filter. Google how to change your HVAC filter. Hire an HVAC person to change your filter.



  • Changing the filter on your HVAC unit extends the life of your unit and improves air quality
  • A dirty air filter makes your HVAC unit inefficient and reduces air flow
  • Change the HVAC filter every 6 months, or every 4 months in dusty climates
  • The filter is found in the furnace or forced air unit
  • The size of the filter is on the outside of the filter
  • The quality of the filter is standard or HEPA
  • Ask a handy friend to teach you how to install your filter
  • Google how to install your filter
  • Hire an HVAC person to install your filter