Recirculated air

Recirculated air

Return air that is diverted from the exhaust route, mixed with incoming outside air, conditioned, and delivered to the conditioned space. Recycling the air circulating through an HVAC system reduces energy requirements.

recirculated air

Air which is withdrawn from an air-conditioned space and passed through the air conditioner before being supplied once again to the conditioned space.
References in periodicals archive ?
AHU for intake, exhaust and recirculated air in hygienic design total air flow 170 000 m3 / h;
Typically the air supplied to the cabin is a 50-50 mix of recirculated air and outside air.
Firstly, the air dries the nasal cavity, so the immune barrier isn't as good; secondly, recirculated air in the cabin means exposure to germs in the environment is more of an issue.
Firstly, the air dries the nasal cavity, so the immune barrier is not as good; secondly, recirculated air in the cabin means exposure to germs in the environment is more of an issue.
In a standard HVAC system, a fixed amount of OA is taken in, either by itself (makeup air system) or mixed with a quantity of recirculated air (mixed air system).
Although infiltration to a zone introduces outdoor air to the zone, the definition of ventilation air from the standard is: "that portion of supply air that is outdoor air plus any recirculated air that has been treated for the purpose of maintaining acceptable indoor air quality" (ASH RAE 2010a).
Recirculated air should be used only where there is little or no pollution caused by work processes, unless the recirculated air is suitably filtered so that it is of the same quality as the outside air.
The lab is equipped with three sensors and recreates the exhalation and body heat of passengers and an airliner's "linear diffuser" environmental control system, which supplies fresh and recirculated air.
MANY TRAVELERS WORRY that the recirculated air aboard jet planes spreads germs from other passengers.
We installed rooftop HVAC units that both heat and cool the building and incorporated UV disinfection and recirculated air.
Of those who do use their air conditioning in winter, some recondition fresh air rather than recirculated air.
A recirculated air blower directs hot air onto the rubber through high velocity air nozzles.