When To Change An Air Filter

The area you live in will determine how often your merv 13 filter needs to be changed. For example, people who live in a desert climate or urban area may need to change their filters more often. However, it is always a good idea to change your air filter every six months or so. If you live in an area with high pollution levels, change your filter more frequently.

merv 13 filter

MERV rating

The MERV rating of an air filter is a measure of its ability to trap various sizes of dust particles. A MERV rating of 50 means that the filter can capture the largest particles. A MERV rating 40 means that the filter cannot capture even the smallest particles. MERV ratings are calculated based on a laboratory study that creates 12 different particle sizes. The average human hair is approximately 50um in diameter and the smallest particles are around 40um in diameter. The test results are then grouped by size, and the lowest one is chosen as the official measurement for the filter’s MERV rating.

Filters with MERV ratings between five and eight are considered medium quality and suitable for most homes. They can trap particles as small and as small as three microns. These filters are also capable of capturing allergens such as pet dander and mold spores.

Size

The size of an air filter is very important, because the wrong size can cause many problems with the HVAC system. For one, the incorrect filter can strain the HVAC system, leading to increased energy consumption and higher energy bills. It will also restrict the airflow, resulting in poor air quality. This can lead to respiratory problems and allergies.

Measure the old filter to determine the size. It is possible that the label has faded or that the measurements are not what you need. To determine the correct size filter, measure the old filter in length, width and thickness. Before measuring the old filter, you should turn off your air conditioner if possible.

Shape

A variety of methods can be used to modify the shape of an airfilter. The filter media sheets can have memory or rounded edges. The filter media sheet can also be formed into a pleated structure. These features could allow the filter media sheets to be shaped in a more efficient manner.

A pleated filter media pack typically defines an inlet face and an outlet face along a first set of creases. There are also grooves that extend along a curved path from the proximate inlet and outlet faces.

Cost

Air filters can be costly but there are ways to cut costs. For example, you can buy reusable air filters. These filters are made from better materials and can be washed and re-used many times.

How often should you replace?

There are many factors that will determine when your air filter should be replaced. If you have pets, the filter should be changed at least once every three months. However, if you have multiple pets, you should consider changing the filter every 20 to 45 days. The filter should also be changed when the seasons change.

The frequency at which the filter should be changed can depend on how occupied your home is. Larger homes will require more frequent filter changes. For vacation homes, however, you will need to change your filter less often. You may not have to change your filter as often if you live alone.