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Changing Filters

FAQ: How often should I change my filter?

This is a question we get asked often.

A few key factors to consider:

  • Does your system run all the time? This varies seasonal
  • How many people and pets live in the home?
  • Construction projects like painting, sanding, carpentry, remodeling affect the system
  • Smoking
  • Hobbies or home business that create dust
  • Leaky air ducts in attics

Maintaining the air filter is easy and is an important part of routine maintenance that will keep you breathing easier and your unit functioning at peak performance.

During summer and winter months the cooling and heating run times are significantly longer. During summer and winter a filter change per month is recommended.

When the filters begin to clog up with dust and house hold debris the air flow to the unit is suffered greatly. Eventually the heating and cooling unit fails. The efficiency, comfort and capacity of the heating and cooling system diminishes.

We get repeated service calls for dirty filters that have damaged the equipment. Frozen inside coil, failed compressor and indoor blower motor are common preventable service calls resulting from dirty filters. Something as simple as a filter change can cause unnecessary expensive repairs.

We recommend marking the date the filter was changed on the filter to keep a good service record.

When you do not change filters regularly the inside coils get dirty and plugged. This cause the air flow to restrict and the inside coil to freeze. Additional problems begin to mount.

If filters are not changed regularly additional service is required more often. And then, the inside coils will need to be professionally cleaned. The dirtier the coil gets the bigger the job and the cost adds up.

The type of filter matters too. We don’t recommend the fiber glass filters that you can hold up to the light and see through. A pleated filter of medium quality is best. A MERV 4-8 is a good number. Honeywell makes a great 4 inch filter that works in most ceiling filter grilles.

Is your filter size correctly matched to your system size? The filter size needs to be calculated by how much tonnage or air flow is required by the unit size.

If your return and supply duct is too small a high efficiency filter can cause air flow restriction and slow down the air flow and cause noisy returns.

If you are unsure if your filter is sized correctly, it is a good idea to have a professional take a look at your return filter size, to calculate the required air and filter size. With a properly sized air return and air filter size you can use the best filter on the market for best indoor air quality.

If you have specific questions please call us today at 480-567-5335.