If you're looking to choose a filter for your HVAC system, you may be wondering if Merv 8 is too restrictive. The answer depends on a variety of factors, including the size of your home, the type of HVAC system you have, and the level of air quality you're looking for. In this article, we'll discuss what Merv rating is, how it affects your HVAC system, and when it's appropriate to use a higher rating. The Merv rating of a filter is a measure of its ability to capture particles from the air.
The higher the rating, the more particles it can capture. A Merv 8 filter is considered a lightweight residential and commercial grade filter, and is suitable for most residential HVAC systems. It can capture particles as small as 3 microns in size, which includes dust, pollen, and mold spores. If you're looking for better air quality in your home, you may want to consider using a higher Merv rating.
A Merv 13 filter, for example, can capture particles as small as 0.3 microns in size, which includes smoke and other airborne pollutants. However, it's important to note that using a higher rating can put more strain on your HVAC system. When using a higher Merv rating, it's important to pay attention to how long your air conditioner runs. If it runs too hard, it can cause coil A to freeze, followed by the line sets and compressor.
If this happens, turn off the cooling but leave the fan running to defrost coil A. It's also important to check the static pressure of your system before using a higher rating; if it's too restrictive, it can damage your HVAC system. In general, it's best to stick with a Merv 8 filter unless you have an allergy or are looking for better air quality in your home. If you do choose to use a higher rating, make sure to change the filter more often so as not to overload your system. You should also check with an HVAC professional before making any changes to ensure that your system can handle the additional strain. Overall, Merv 8 is usually suitable for most residential HVAC systems.
However, if you're looking for better air quality or have an allergy, you may want to consider using a higher rating. Just make sure to pay attention to how long your air conditioner runs and check with an HVAC professional before making any changes.