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Air which is withdrawn from an air-conditioned space and passed through the air conditioner before being supplied once again to the conditioned space.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 ?
Dual blowers located inside an acoustically insulated blower box force the recirculated air to the top plenum.
The coil bypass air-handling unit addresses this problem by taking only a portion of the air across the coil, all of the outdoor air that is likely to require dehumidification, and a portion of the recirculated air determined either by the sensible or the latent load within the space.
With the following accessories per device: - Adapter for recirculated air operation, - 7m vacuum hose dia.
Therefore, a simplified anti-fog control was defined as a method of detecting the relative humidity in the vicinity of the front windshield, detecting the occurrence of fog, and controlling the mixing ratio of recirculated air to prevent the front windshield from fogging up [7].
Like the oven (and downstream cooling zone), the flow-coating zones and flash-off zones operate energy-efficiently with recirculated 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.
Depending on the number of fan/filter units (FFUs) being serviced, additional Vertical Air Return modules may be required to ensure ample recirculated air supply to the FFUs being serviced recirculated air supply to the FFUs.
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.
In fact, some luxury cars are equipped with as many as three different types of filters: one for fresh air, a second for recirculated air and a third made of activated charcoal to remove odors.