Do You Need Makeup Air For Dehumidifier

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Conditioned Makeup Air

If you don't practice a lot of commercial work, you lot may see a organisation like the 1 above and wonder what the heck information technology is. It is a 100% fresh air unit or a makeup air unit. You will come across them more and more than as codes first to reflect that counterbalanced ventilation and conditioned outdoor air are a vital function of a healthy and comfortable building.

What are they for?

Virtually commercial buildings require that a expert corporeality of outdoor air be brought into the edifice to dilute VOCs (volatile organic compounds), reduce CO₂ buildup, and replenish oxygen levels.

In many cases, this fresh air requirement is accomplished through fresh air intake on the HVAC equipment. However, buildings are increasingly using dedicated fresh air machines every bit ductless, and VRF systems have recently become more popular.

The type shown to a higher place is most often used in kitchens, where there is significant frazzle air. When air is wearied, you must add back outdoor air to reach balanced ventilation. In the past, nosotros would see many restaurants and grocery stores pump unconditioned makeup air into the kitchens. Then, we would see moisture bug and everything that entails in humid climates and hot kitchens. (To learn more about makeup air in restaurants from a fire safety perspective, check out Christopher Stephens's article about it Here.)

By filtering, cooling, and dehumidifying the air as it travels through the makeup air intake, we tin can command the temperature and dewpoint of the air and reduce these problems.

The refrigerant side of this particular type of machine functions very simply. It uses an air pressure switch to "prove" sufficient negative air pressure, which indicates that the cooling equipment that sufficient airflow is present. It and so uses a thermostatic control that measures the incoming air temperature to plow the equipment on and off based on heat load.

These tin as well exist set upwards to work off of enthalpy—which is the full heat content of the air (humidity & temperature)—rather than the air temperature. It functions much similar an economizer in this way; it tin can take advantage of the outdoor air when appropriate or run cooling and dehumidification where needed.

—Bryan

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Source: https://hvacrschool.com/conditioned-makeup-air/

Posted by: cohenkeire1972.blogspot.com

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