I try to remember to replace the filter for my heater and air conditioner on a regular basis. Most recently, I purchased a filter that was suppose to be good for 90 days. I set a reminder on my computer, and replaced the filter this weekend.
The filter was totally covered with a layer of thick, gray cat hair. Sake cat hair. Well, 90 days is too long. I set a reminder for 60 days, but as I was thinking about it as I wrote this blog, I decided I needed to check it at 30 days, and if it was okay, I could extend the check cycle.
One of my co-workers has an HVAC license. He says the most important way to do preventative care of our HVAC system is to change the filter. I believe it. I do change the filter regularly, and trying a filter that was suppose to be good for 90 days was an experiment for me (although I am not always 100% diligent at changing the filter on time.)
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