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October 18, 2018

What Does the Arrow on a Furnace Filter Indicate

Changing the furnace filter can be confusing for those not familiar with how an HVAC system works. Sometimes these filters (which are the same ones for the air conditioner) are in hard-to-access places; sometimes they are easy to reach. What’s more, the many types of filters available can be confusing, as can the directions on the package: just what do those arrows mean, anyway? And what happens if you insert the filter the wrong way? Read on, and find the […]