Mixed air refers to the blend of return air from indoor spaces and fresh outside air within an HVAC system. The proportion of each can be adjusted based on system settings and conditions. This mixing helps maintain indoor air quality, ensures adequate ventilation, and supports temperature and humidity control.
/ˈmɪkst ˈɛər/
Mixed air refers to the blend of return air from indoor spaces and fresh outside air within an HVAC system. The proportion of each can be adjusted based on system settings and conditions. This mixing helps maintain indoor air quality, ensures adequate ventilation, and supports temperature and humidity control.
Why is mixed air important in HVAC?
It balances ventilation with comfort by combining outdoor air with return air before conditioning.
Source: The Cooling Company
Return air and outdoor air mix before conditioning.
In many buildings, HVAC systems mix conditioned return air with outdoor air, then condition and distribute it to maintain comfort and safety.
Regular HVAC maintenance, including cleaning and inspection, supports efficient air mixing and overall system performance.
“Regular HVAC maintenance, including cleaning and inspection, supports efficient air mixing and overall system performance.”
Mixed air can also describe the fuel-and-air blend used in combustion systems.
What controls the mixed air ratio?
Dampers and control settings adjust how much outdoor air and return air mix.
Can poor mixing affect comfort?
Yes. Poor mixing can cause uneven temperatures and reduced air quality.
Is mixed air the same as supply air?
Mixed air is blended before conditioning; supply air is the conditioned air delivered to rooms.
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