For Merv 8, 11 and 13 filters, it is recommended that you change the filter at least every 3 months for optimal filtration and healthier air in your home. However, if the filter is made of fiberglass, experts suggest changing it every 30 days. Pleated filters can last up to three or six months before needing a replacement. MERV 13 filters should be replaced every 9-12 months.
Changing the filter every 30 days can be a hassle, especially in spring and autumn when there is less need for heating and cooling. If your house has low infiltration or leakage in the ducts and a low level of dust, the filter can last longer even when used frequently. If you have pets, children or allergy sufferers in your space, it is important to replace the filter more often. An old filter will not remove bacteria and dirt from the air as efficiently, leading to poorer indoor air quality and higher energy costs.
Our MERV 3 1, 2 and 4 air filters are designed to last approximately 3 months, while our MERV 13 replacement whole house filters need to be replaced every 6 months. A good oven filter can help improve air quality in your home, but a dirty air filter will do the opposite. The longer the filter is in place, the more dirt, dust and allergens will be trapped, clogging the filter and decreasing its efficiency. It is important to replace filters regularly to ensure that the air is kept clean, energy costs are reduced and the air conditioner is working properly.
When using cheaper fiberglass filters, it is a general recommendation that you change the air filter in your house every 30 days. Air filters with a MERV 11 rating or higher can typically last three to six months before being replaced. Due to their pleats, filters such as the Honeywell Ultra Efficiency filter (also available on Amazon), have more square inches of space to trap dust, so they often require fewer changes every 90 days. Northern inhabitants whose ovens have no rest for months may want to change their filter every 30 to 60 days due to more air being sucked through the filter. It is important to know the ideal type of air filter for your needs.
To replace the filter in your air conditioning or heating system regularly keeps the system running efficiently and maintains the air quality in your home. Check surfaces farthest from ventilation grilles if they are not so dusty - this could indicate a problem with your air filter. To replace an air filter, loosen screws that hold the filter cover in place if it is behind a return air vent or simply pull the filter out of a slot if it is on the side of the oven. One of the most important things you can do on your own to take good care of your HVAC system is to simply change your air filter on a regular basis.