The simple reason is, ventilation is required for both HVAC comfort and good air quality. Without enough ventilation in your space, you will eventually (and sometimes quickly) experience comfort issues and even health problems. These could range from having trouble sleeping in a stuffy bedroom to experiencing Sick Building Syndrome in a commercial space.
According to the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE), an HVAC system should “heat, cool, clean, ventilate, humidify and dehumidify as needed to provide health and HVAC comfort.”
You’re probably familiar with all the other components: heating, cooling and even humidification and de-humidification. But what is ventilation all about and how does it contribute to HVAC comfort? It’s about adding the proper amount of fresh air from outside to the indoor air in your space.
In fact, ASHRAE’s definition goes on to explain that ventilation is one of the most important jobs of an HVAC system. Why? Because without it, in the best case your space lacks fresh air and becomes stagnant and uncomfortable. In the worst case, you can be trapping in toxins and contaminants that can make people sick. It’s so important that ASHRAE publishes a detailed standard for ventilation requirements for acceptable indoor air quality.
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