When choosing an air conditioner as a homeowner, you need to be aware of the type of filters and maintenance that will be required to keep your unit running smoothly. Whether or not that this comes to your mind, it is essential to understand what the MERV rating is and what it means to you as a homeowner.

Stale air is defined as recycled air combined with humidity and certain chemicals. It produces an unpleasant smell as contaminants build, and oxygen decreases. While stale air won’t immediately cause you harm, the air that contains certain toxins, chemicals, and bacteria can be harmful over a long time. When indoor air smells stale or feels stuffy, carbon-based molecules that occur from breathing, form together to produce the musty smell known as stale air.