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Changing AC Filters | Ambrose Air Inc.

Florida summers are pretty scorching. It’s very common to keep the air conditioners running non stop during the summer. Changing your HVAC air filters is critical for its long life and preventing possible Orlando AC repair needs.

Why should I change my air filter?

1. A dirty air filter is the #1 reason for HVAC system failure. A dirty filter restricts the air flow into your HVAC systems air handler. This restricted air flow places additional strain on the air handler fan motor and could, over time, burn out the motor and cause your system to overheat and ultimately fail. Filter replacement is a small price to pay to extend to life of one of the biggest financial investments in your home.

2. A dirty air filter makes your fan motor work harder and consume more energy. One of the easiest and quickest ways to reduce your energy bill is to replace your air filter.

3. A dirty air filter reduces the air quality in your home. Poor home air quality can aggravate allergies and asthma, particularly children’s allergies. Change your filter for your family’s health.

4. A dirty air filter makes your heating and air-conditioning systems and your ducts get dirty faster. This can lead to costly cleaning expenses or to a need to replace your units sooner than you expected.

5. A dirty air filter increases your energy bills. You can see an immediate, short-term cost saving s when you replace your air filter.

6. A dirty air filter increases your carbon footprint. Changing your filter reduces the amount of energy your home consumes. It’s an easy and inexpensive way to be environmentally responsible.

Where is my air filter located?

Your air filter is most likely located right next to your furnace or air conditioning system air handler. The air handler is the large box containing the fan and fan motor. The air handler pulls air in from the house through the “return” duct system, and then blows the air through the heating or cooling system and back into the house through the duct system. The air filter is typically located at the point where the return duct enters the air handler. Look for a 1” wide hinged or removable cover. The air filter will be inside.

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Increasingly, air handlers are being installed in attics. This sometimes limited space will require installation of the air filter in the return. The filter is accessed by removing the grate covering the return duct. It is now unusual to have several returns in a house, with an air filter installed in each return.

What are my air filter dimensions?

Air filter sizes come in a variety of dimensions. The most common width is 1”, but height and length will vary by manufacturer. Most standard filters print the dimensions on the filter frame. You can use those filter dimensions to select the appropriate size replacement filter.
Unfortunately, some filters are not marked. In this case you will need to measure the dimensions of your existing filter. Please measure them twice before entering your filter size into the filter wizard on

Please also be aware that many filters may have actual dimensions that are not exact whole numbers—for example 17½” x 23¾” x 1”. If this is the case, you should round the fractional dimensions up to the nearest whole number. In the example, this would require a filter with nominal dimensions of 18” x 24” x 1”.

Still Have Questions? Visit Our AC Filter FAQ Page

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