Things to keep in mind for better indoor air quality

Never put the HVAC fan in the "on" position. Keep at "auto". The fan in the "on" position can cause the HVAC unit to push unconditioned wet air through the system. It often results in mold growth in the plenum.
By: Sunsation Services
MERRITT ISLAND, Fla. - June 13, 2022 - PRLog -- Per Ned and Darlene Marcoux, owners of Sunsation Services. Your best choice for Brevard County Florida Mold and Air Quality Testing.

The plenum is the duct board that stretches from the HVAC unit to up above the ceiling. Once mold grows in the plenum, all the air that passes through the HVAC becomes contaminated. Also, the moist air distributed throughout the home can create conditions favorable for microbial growth in the contents of the home.

Do not run AC while sliding doors or windows are open. This is a recipe for condensation. Mold needs moisture to grow. When cold air meets hot air, condensation creates favorable conditions for mold growth.

If closets don't have a diffuser and have solid doors, keep the door open when possible – allow for airflow and don't overstuff the closet. Warmer air and a lack of airflow can create conditions favorable for mold growth. Check leather shoes, handbags, jackets, and belts. Also, look at the brims of hats. Leather and the sweat left on hats are lovely food sources.

Don't close the fins of a diffuser. This will keep one room warmer (and wetter) than the others. It will also make a bigger temperature differential where some air escapes around the fins, creating condensation.

Keep diffuser fins pointed into the room, not at the ceiling. The cold air from air conditioning meeting the hottest air in the room (hot air rises) can cause enough condensation to allow microbial growth to occur. Growth may also occur around diffusers because condensation can form when there is a gap between the diffuser and the ceiling that allows cold air to meet the warmest air in the home (hot air rises). Installing weather stripping between the diffuser and the ceiling should prevent this. Another possibility is that there is a gap between the duct boot and the ceiling drywall. This would allow hot attic air to meet conditioned air, again causing condensation. Caulking the gap between the boot and the drywall should stop this from happening.

Burning paraffin candles will cause soot to accumulate at the diffusers and in the HVAC filter. The soot can be a health hazard. If candles are a "must", use beeswax or soy without scent. Beeswax and soy burn cleaner. Any time there is a scent, VOCs (Volatile Organic Compounds) are present. Some VOCs can be hazardous.

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Ned and Darlene Marcoux
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