UPDATE: This is my second (or maybe third?) order of this filter and it's still a great choice. However, this is mainly because this is the only choice for my oven as it is a specific filter type and size and I have never seen one in the store. But the price is good and delivery is fast. My smart thermostat has an indicator for when. It should be replaced, but I found that it should be replaced long before the system "tells" you to replace it. I've found that doing it every 6 months is probably a good idea in most cases, and every 4 months if you have a lot of animals and such when it says to replace it about once a year. Good buy, definitely fits. its job and does it well. Original post: Fits my oven perfectly and as far as I can tell it's an air purifier. I take good care of my home.
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