Easy Guide to Changing Your Air Filters

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Air filters are the unassuming heroes of your home’s heating, ventilation and air conditioning (HVAC) system as they work tirelessly to trap particles, dust and even bacteria as air is passed over them to be heated or cooled. The result is fresh and clean air being passed back into your house to either heat up or cool down your rooms and with this promo code from Filter King, you can do so for a fraction of the price. But this filtering is dirty work and unless they are replaced regularly, your air filters will get clogged, which will not only reduce the efficiency of your heating or air con unit but could also cause damage and reduce its lifespan. 

How often should I change my air filters?

The simple answer is when they look dirty but as a general rule of thumb, air filters will need changing between one and three months, depending on the type, their MERV rating – which indicates the size of particles they can pick up – and the particular environment (eg. pets) in your home. 

What should I look out for?

When deciding whether it’s time to change your air filter, the dust-build up will be apparent, creating a dusty, ashy-grey on the duct-facing side of the filter. Also, if there’s any build-up of dust on the outside of the air vent, this is sure to sign that the air filter is passed its working best. 

Where are the filters located?

Air filters are usually housed in either the return duct or at the opening to your heating and air conditioning system’s blower chamber. 

Steps to changing an air filter:

Changing your air filter is a simple process and done regularly, can go a long way in keeping your HVAC system working at its energy-efficient best and extending its lifespan. Here’s how to do it:

  • Open up your filter compartment – Turn off the HVAC system first. Then remove the door panel or unscrew a metal slot to gain access to the filter that needs to be changed. Always refer to your manufacturer’s manual for specific guidance. 
  • Remove the air filter – the filter should easily slip out of its holding. This is a good time to assess whether it is the right filter for your home, especially if it’s not been in for long and is showing signs of excessive wear or you have noticed your home is a little more dusty than usual. If this is the case, you may need to switch to a better-quality filter or one with a higher MERV rating. 
  • Insert your new filter – write the date on the new filter so you know when it was added and so you can track how long it will be in place. Now insert the air filter using the arrows printed on the outside to show you the direction air should flow through. These arrows must point away from the return duct and towards the blower motor. Close up the compartment and re-fit the door or slot. 
  • Make a diary note – pencil in a check for a month’s time so you can assess the filter’s condition and if it’s clogged. The average air filter can last up to three months but by regularly checking you can ensure you’re changing the filter at the optimum time for your HVAC system and your home.