Should Your HVAC Fan Stay On 24/7?

One caution to keep in mind: the advantage you receive from filters is highly dependent on the type of filter installed in your HVAC system

The HVAC fan that distributes warm and/or air conditioned air throughout your area is controlled by two settings on your thermostat. You may set it to AUTO, which will activate the fan whenever your air conditioner or furnace is turned on. You may also set it to ON, which instructs the system to keep the fan operating at all times. When the HVAC fan operates continuously, it has a better chance of adequately distributing warm and chilled air throughout your house or commercial space. This can aid in the elimination of hot and cold zones and increase comfort. When the weather is mild in the spring and fall, your heat or air conditioning may not be turned on very often, if at all. With a lack of air circulation, the indoor air can get stuffy, especially in city buildings that are highly sealed and may not have windows that open. Running the HVAC fan can assist keep the air fresh and aid to dispel smells. When your HVAC fan operates continuously, more air is cycled through your HVAC filters which can help to minimize airborne pollutants. This can result in fewer allergens such as pollen and dust, as well as VOCs, pollutants, and even mold and bacteria that cause sickness. One caution to keep in mind: the advantage you receive from filters is highly dependent on the type of filter installed in your HVAC system. Standard HVAC filters aren’t designed to collect particles as small as viruses or even some forms of pollen. They are primarily intended to protect dust and debris from entering your HVAC system. Filters having a higher MERV rating, on the other hand, may remove more sorts of particles, as long as your system can tolerate them.

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