How to Replace your Home Furnace Air Filter

Swapping out a clogged air filter is one of the most vital furnace maintenance steps to keep your home furnace working at its best. Dirty filters can make the unit struggle which deteriorates the unit sooner than normal, plus it reduces the quality and flow of the air. You’ll end up having to pay for maintenance issues as well, when they inevitably arise from the system having to work harder to heat your space.

There are several factors you need to consider when replacing these airfilters, such as the size of your family, whether you have pets and environmental influences that may cause the filter to clog quicker than other households. However, it’s a good idea to check the filter every month to see if it needs replacing before the three-month point. Using a service such as Filter King is a good idea for convenience – they send you the filters you need so you don’t have to worry about forgetting to pick up filters throughout the year. Here are some tips for how to replace the filter in your home furnace.

Determine the Filter You Need

Before you can replace the filter, you need to know the type of filter your furnace requires. Using the wrong filter could cause the furnace to become faulty and not work as efficiently. You’ll find the type of filter you need inside the unit or on the return air vent, which is typically behind the panel at the bottom of the furnace. Remember to always switch off the furnace before you start looking inside. Once the unit is switched off, remove the existing filter and note the size that’s printed onto the cardboard frame. You’ll need a new filter to match this size so that the furnace continues to run efficiently.

Buy Your Replacement Filter

Whether you order online, head to your local store or contact your local HVAC contractors, there are numerous ways of buying your replacement filters. Purchasing online is often the most convenient for many people. Just make sure that the size and type of filter matches what you have, as if you choose a different type of filter, your furnace may not be able to cope with the density of the filter which will cause it to wear out the motor of the system.

Install the New Filter

Once you’re ready to install the filter, switch off the furnace or cut the power to the system so that it’s safe. Open the air filter panel and remove the filter that is inside, checking which direction the arrows are pointing so you know which way to install the new filter – these indicate the proper flow of air. These arrows usually point to the top of the furnace but double check the unit you have to be sure. You can then put the new filter in, close the panel and switch on the system once again.