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How do I change/install my air filter?Updated 3 months ago

You're probably here because you either bought your first Windmill filter pack or just received your replacement reminder text. Either way, welcome (back) to the install lair! 

Let's go through the 5 easy breezy steps on how to replace your air filter.

(1) Turn off your HVAC system. You don't want air blowing during this process. You can turn off your system by either using the thermostat or (if available) a "light-switch" by your furnace.

(2) Open the vent or slot where your air filter is located. For window/ceiling vents, it's usually latches or screws. For furnace installs, it's usually in slot. If you need help finding your air filter, click here

(3) Remove your old air filter by gently pulling it out (trying not to kick up too much dust). Dispose of it by placing it directly into a trash bag. 

(4) Unpack your new air filter and slide or place it into the filter slot

What direction does the filter go? 

Find the arrow on your filter, read the instructions below, and refer to the GIFs at the bottom of this page:

  • Ceiling or Wall Install (2 ways to think of it)
    • Option 1: When installing, the arrow should point in the same direction that you are looking (or the arrow should point away from you, NOT towards you) 
    • Option 2: When installing, you should be seeing the smooth, non-wired side of the filter (or, the metal/wired side of the filter should be going into the wall/ceiling)
    • Both options accomplish the same outcome: they both point the arrow in the direction of the airflow (because air is sucked in, not pushed out, through this vent)
  • Furnace Install (2 ways to think of it)
    • Option 1: the side with the metal wiring should towards the machinery of the HVAC (i.e. the coils, wires, motor, etc.. basically the more intense-looking part of the system, not the emptier, more cavernous duct).
    • Option 2: the smooth, non-metal side of the filter should be towards the tall (tower like) duct, while the metal side of the filter should be towards the part of the furnace that has the machinery and smaller tubes coming out at the top.
    • Both options accomplish the same outcome: they both point the arrow in the direction of the airflow (because air comes from the large duct and is pushed into the machine's coils)

(5) Once installed, close your vent or slot and text us! That way we know when to remind you of your next filter change. 

And that's it, you filtered it out! You can now turn your HVAC back on and breathe easy knowing that you've taken care of your air.



Ceiling InstallWall Install
Furnace Install
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