You’ve probably experienced the feeling of confusion when trying to select the correct home air filter for your needs. What’s the best one? Is the more expensive products worth the investment? These are just some of the questions that make the selection mind-boggling. Let Comfort Masters Service Experts Heating & Air Conditioning attempt to resolve your home air filter questions and allow you to continue enjoying the comfort of your home without concern.
Here’s a tried and true way to tell how efficient your old filter is (NOTE: To avoid a big mess, we highly recommend conducting this test outside or over a protected surface): Hold the filter horizontally, then using everyday table salt, begin to pour the salt through the filter then see the quantity that comes out the other side. If some or all the salt falls through the filter, then you know that the filter will let dust that same size flow through. You really should upgrade your filter to higher quality filter that is more efficient.
Home air filter selection depends primarily on three factors: Size, material and MERV rating.
1) Filter Size
Size is the easiest factor to ascertain. Simply look at the label of your existing filter to see the proper measurements, or just measure it yourself. Most home air filters are 1” thick, but there are a variety of standard width and height dimensions, and some systems have thicker filters.
2) Material & MERV Rating
Filter efficiencies are given a number from 1-16 called the MERV rating. MERV stands for Minimum Efficiency Reporting Value. This number identifies for the user, under the least efficient conditions, how well the filter is designed to hold contaminants.
To explain MERV ratings more impactfully, these are some usual MERV ratings and how they relate to efficiencies. This is only a guide, so be sure to read the filter manufacturers’ information when buying specific filters.
Rating Average Filtration Efficiency
MERV 1-4 60-80%
Fiberglass, Disposable Panel, Washable metal/synthetic, self-charging (Passive)
MERV 5-8 80-95%
Pleated, Media panel, Cube
MERV 9-12 >95%
MERV 13-16 >98%
Be Careful About High MERV Ratings
While a higher MERV number may offer better filtration efficiency, it is critical to understand that too high a MERV filter may also cost you more to operate your heating and air conditioning system. The higher the MERV, the more restricted the air may flow through the system, and the harder the system may need to work. Your goal is to get the right balance between air flow, air filtration level and energy efficiency.
Consider it this way, the most efficient ‘filter’ would actually be a piece of plywood that prevents ALL contaminants and all the air from entering your Wheeling home. That's all-out air filtration, but would also be like living in a box.
A safe bet for most systems would be a MERV 6-8. A higher MERV filter should be used subject to the advice of your Comfort Masters Service Experts Heating & Air Conditioning service advisor to verify your system has the capability of moving the proper quantity of air through higher efficiency filters. You generally do not want to give up energy-efficiency for filter efficiency; you want a balance of the two. However, if your family has allergies or respiratory problems and needs a high MERV air filter, consider a whole-home air filtration solution that will achieve your energy and filter efficiency needs.
Filtration has changed significantly over the past few years. Originally, home air filters were used in the furnace or air handler only to shelter the comfort equipment itself. The story is different today. Wheeling area homeowners expect their air filter to save loved ones from a wide variety of harmful pollutants, dust mites, and even prevent the need for dusting. Dare to dream!