Understanding MERV RatingsMERV stands for minimum efficiency reporting value and it is basically a measure of how effective a furnace filter is. Although the scale ranges from MERV 1 to 20, the majority of furnace filter retailers only carry filters between MERV 8 to 13. To put it short, the higher the rating, the more particles the filter will trap and therefore the higher the quality. The table below breaks down the particle size each MERV rating is capable of filtering.
(NOTE: 1 micrometer is 1000 times smaller than a millimeter)As you can see from the table, the difference between a MERV 8 and a MERV 13 is ONLY 2 MICROMETERS! It doesn't sound like much at all, especially if you consider that 2 micrometers is 0.002 millimeters. Paying a premium for an additional 0.002 milometer of filtration may sound crazy, until you consider how things work at the molecular level.
The Difference That 2 Micrometers Can MakeNot to sound overly dramatic but at the molecular level what may seem like a minuscule difference can actually mean the difference between life and death. (hence why hospitals only choose a certain type of filter, as I will explain later). Now I don't want to alarm you, chances are, nothing fatal will happen in your home if you choose a lower MERV filter. However it's important to understand the limitations of a MERV 8 filter and the benefits of a MERV 13.
What MERV 8 is able to doMERV 8 filters are great for an average home. It is miles better than fiberglass filters and is still quite reasonably priced. This type of furnace filter will be able to trap anything larger than 3 micrometers, which is enough to trap the common pollen, dust and debris.
Why MERV 13 makes a huge differenceMERV 13 filters are great for anyone looking for an advanced level of air quality in their homes. There is a reason why many hospitals and other medical facilities use MERV 13 filters. This type of furnace filter will be able to trap anything larger than 1 micrometer, which effectively traps pet dander, mold spores, car fumes, smoke, bacteria and other microallergens. Trapping bacteria and microallergens can help prevent various harmful sicknesses and severe allergic reactions. Avoiding these contaminants in the air inside your home may mean vast overall health benefits.
Comparing MERV 8 vs MERV 13
How to determine which is filter is the best for your home
Each household is different and therefore requires a different level of filtration. As mentioned earlier, MERV 8 filters are a great solution for most households, so chances are, you will be just fine with this one. However, below are a few reasons why you might consider upgrading to a MERV 13. Allergies - if you suffer from allergies and don't currently use a MERV 13 filter in your household, we highly recommend giving it a shot.
You may end up spending an extra $40 or $50 for a year supply of furnace filters, but its a small cost to help relieve allergy symptoms. Pets in your home - Another reason to upgrade to a MERV 13 is if you own a pet. Pet dander can have detrimental effects on the air quality in your home and upgrading your filter will definitely help. This is even more important if you have multiple pets in your home. Smog and construction - If you live in an area with heavy construction, factories or smog, using a MERV 13 filter will ensure that the air inside your home will not be contaminated. Wildfire smoke - The last reason why it would be a good idea to upgrade to a MERV 13 filter is if you live in or near a wildfire smoke area. Much of Western Canada and US have been affected by the wildfires this year and many of our own customers were affected. They have told us that they have noticed an immediate difference within just a couple hours after installing a MERV 13 filter.
The Final VerdictWhat may seem like a minuscule difference (literally, 0.002 millimeters), has drastic effects on the air quality in your home. We have had several customers tell us that the difference between the two filters was night and day, citing:
- Improvements in sleep
- Less headaches
- Increased energy
- Overall higher quality of living