Indoor air pollution is a top-five environmental risk to public health.High amounts of indoor air pollutants are of particular concern because most people spend about 90% of their time indoors.Indoor levels of pollutants may be two to five times – and occasionally more than 100 times – higher than outdoor levels.The average person receives 72% of their chemical exposure at home.Environmental Protection Agency (EPA) states that: Indoor air in residences can be quite unhealthy. Deficient IAQ is a serious problem in all buildings since it negatively impacts indoor occupants’ health, cognitive function, productivity and wellbeing. We’ll get to the “how and what” of ventilation, but let’s start with the “why.” Why do we even need ventilation in the first place? The answer is to support the health and wellbeing of indoor occupants by improving the quality of the air they breathe.Īs buildings become more airtight to save energy, an unintended consequence is an accumulation of internally generated contaminants that cause deficient indoor air quality (IAQ). In this brief white paper, we’ll take a look at each mechanical ventilation option, and discuss how they work, their benefits and any concerns that exist. The different types include exhaust, supply, balanced and energy recovery. Enter mechanical ventilation, which offers several options for moving stale indoor air out and fresh outdoor air inside. However, with greater air-sealing methodologies on the rise, this method is insufficient. Historically, structures were ventilated using natural means, such as opening a window or door to let fresh air into a space. Mechanical Ventilation Types: Exhaust, Supply, Balanced & Energy Recovery
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