Fortunately, most 20x25x4 air filters last between six and eight months, so the average homeowner won't need more than two of these filters in a year. For basic air filters of 1 to 3 inches, brands usually recommend changing them every 30 to 90 days. If someone in your family has mild to moderate allergies, you can put a better air filter on them or change them more often. In general, most air filter manufacturers and HVAC companies suggest changing them every 90 days or 3 months.
This can vary depending on the location of your home, if you have pets, and the age of your system and equipment. If you have pets at home, it's best to change the filter every 60 days or 2 months. For homes with several pets or people with allergies or respiratory conditions, we recommend changing the filter every 20 to 45 days. Vacation homes or empty houses that aren't used much usually wait to change the filters every 9 to 12 months.
The more you use your home, the more often you'll need to change the air filter. It is generally recommended to change residential air filters every 30 days if regular fiberglass filters are used. When air filters don't change, dust, pollen, dirt, and other contaminants accumulate and decrease filter efficiency. A flat filter, such as the Flanders front panel filter (available on Amazon), is designed to be changed every 30 days.
It consists of loosening the screws that hold the filter cover in place if it is located behind a return air vent, or simply pulling the filter out of a slot if it is on the side of the oven. Maintaining new filters in the oven will help ensure that the oven operates smoothly and efficiently and, most importantly, that the air you and your family breathe is as clean as possible. Even if no one in the house is allergic, it is advisable to change the oven filter frequently, up to every 30 days if you have several pets, to keep the oven running efficiently. If you need help choosing the right filter for your system and a professional who can help you change it, call the professionals at Paschal Air, Plumbing & Electric. If there are no smokers or pets in your house and your filter is filter 1, which is usually sold with a MERV rating of 4, you should be able to wait up to 90 days before changing it. Thanks to their folds, filters such as the Honeywell Ultra Efficiency filter (also available on Amazon) have more square inches of space to trap dust, so they usually need fewer changes every 90 days. During a remodeling project, change the boiler filter every 30 days or even more frequently to prevent construction-related dust from circulating around the house. For an animal that lives at home, you should change the filter every two months for a one- or two-inch filter, four months for a four-inch filter, and six months for a five-inch filter.
If you live in a temperate region such as the Southwest and only turn on your oven a few times during winter, then the standard 90-day schedule may be perfect for you.
