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homeguides.sfgate.com/right-way-insert-furnace-air-filter...

These arrows are always meant to point in the direction of the airflow; another way of determining the correct orientation of the filter is that the arrows always point toward the furnace itself.

www.cleanalert.com/blog/which-way-does-furnace-air-flow...

So, air flows from your ducts, through the filter, and into the furnace. What’s The Right Furnace Filter Direction? If you are looking at a furnace filter, find the arrow that indicates the proper air flow direction. That arrow must always face toward the furnace and away from the return duct that carries the air in need of heating or cooling.

removeandreplace.com/2016/09/08/air-conditioner-air-filter...

For any air filter, whether it be for an air conditioner or a furnace, the ARROWS ALWAYS POINT IN THE DIRECTION OF AIR FLOW. When you install a new air filter into the AC return duct, the arrows face inward to specify which way the air is flowing. The return duct in your home is PULLING in air. When the air is being pulled or sucked in, the air ...

www.jerrykelly.com/blog/install-your-furnace-filter-in-the...

After you have made sure that your filter is installed in the right direction, you can simply look at which way the arrows are pointing on your old filter every time that you install a new filter. Call Jerry Kelly to take care of your furnace filters If you have any questions about the right airflow direction for your furnace filter, or if you ...

www.cleanalert.com/blog/how-to-insert-a-furnace-air-filter

>> Here's how to choose the best furnace air filter. By the way, if you aren't sure exactly when to change your filter, invest in an electronic air filter monitor. It will eliminate all guesswork on your part. To Properly Insert a Furnace Air Filter, Look for the Arrow! Ok, so you have realized that now is the time to change your air filter.

www.shopyourway.com/questions/1002534

The short answer is that the arrow should point toward the furnace. The filter sits in the return air duct at the point where it connects to the furnace. The purpose of the filter is to remove any contaminants before the air enters the furnace.

www.hunker.com/13415602/how-to-replace-a-bryant-filter

Pull out the old filter and make note of how it goes into the slot. Your old filter should have arrows showing which direction the air flows. This can help you insert the new filter the same way. If the old filter is really dirty, the debris may be clumped on and can fall off, so have a trash can handy to dispose of it easily.

www.aafintl.com/en/residential/resources/airflow-arrow

Determining which way the airflow arrow points can be one of the biggest challenges when installing your air filter. A filter installed incorrectly can obstruct airflow, increase strain on HVAC equipment, and cost you extra.