For 3- to 4-inch filters, it is recommended to change them every 6 to 9 months. For 5- to 6-inch filters, they should be changed every 9 to 12 months. A 4-inch furnace filter should be replaced sometime between six and nine months. This is the basic consensus among HVAC professionals, as it is essential to replace your furnace filter every 90 days or every three months.
However, this depends on the thickness of the filter. Thicker filters have more room to accumulate dirt and dust, so they don't need to be changed as often. Thomas & Galbraith Heating, Cooling and Plumbing, of Ohio, suggests changing filters less than 2 inches thick every 30 to 90 days. Three- or 4-inch filters can last 6 to 9 months, and filters up to 6 inches thick can be replaced once a year. Filters can also keep rabbits at bay from dust, eliminate bacteria from your home, eliminate cigarette smoke and smog, and help get rid of dander from your cats and dogs.
However, if your heating, ventilation, and air conditioning system has a single filtration system that uses an air filter for the air conditioning unit and furnace, replacements will be less common in winter than in summer. According to Bob Vila, the filters are designed to protect the furnace from these particles and, in reality, improving air quality is only a beneficial side effect. For that reason, the heating season is one of the most important times of the year to keep up with the furnace air filter change. The filter will say that it needs to be changed within 30 to 90 days, but in practice, 90 days is probably too long. The furnace filter is used to clean the air of contaminants and dust just before air enters the furnace system.
During the winter, when the furnace is used more often, you will have to replace the furnace filter more often. Heater fan The frequency at which the heater fan operates will affect how often you have to replace the filter. Having multiple animals means that you must change a one- or two-inch filter every month, a four-inch filter every two months, and a five-inch filter every three months. If the heater fan is constantly on, you'll have to change the filter every month; if you have it turned on sometimes it's every two months and not having it on can be every three months.
Why Is It Important To Change Your Furnace Filter Regularly?So how often should an expert recommend changing your furnace filter? Let's take an in-depth look at your home furnace filter, what it's for, and why it's important to change them regularly. You can say that you need to change the one-inch filter in sixty days, when in fact you have a four-inch multimedia filter that doesn't need to be changed yet. Even if you live in a temperate climate with excellent air quality, there's another important reason to change your furnace filter as recommended. Long-term costs include more frequent repairs and the need to replace the furnace or the entire HVAC system sooner than expected. If you pull it out of its frame and stretch it flat, it could be 20 or 25 feet long, while a one-inch filter, even if it's pleated, could measure a foot and a half.
Generally speaking, you don't need to change HVAC furnace filters as regularly during the winter months compared to the summer months. As an expert in HVAC systems and air quality control systems I recommend replacing your 4 inch furnace filter between 6 and 9 months depending on its thickness. Thicker filters can last longer but should still be replaced at least once a year. It is important for homeowners with HVAC systems to replace their filters regularly as this helps maintain good air quality in their homes while also preventing costly repairs down the line. It is also important for homeowners with multiple pets or those living in areas with poor air quality to replace their filters more frequently - up to once a month for 1 or 2 inch filters and up to 3 months for 4 inch filters. The frequency at which your heater fan operates will also affect how often you need to replace your filter - if it is constantly running then you should replace your filter monthly while if it is only running occasionally then you may only need to replace it every 3 months. In conclusion I would recommend replacing your 4 inch furnace filter between 6 and 9 months depending on its thickness - thicker filters can last longer but should still be replaced at least once a year - while those with multiple pets or living in areas with poor air quality should replace their filters more frequently.