Ventilation Air
1. The total volume of air in a system, which is a combination of the air brought into the system from the outdoors and the air that is being recirculated within the building. 2. The fresh air brought into the system from the outdoors.
The quantity of ventilation air depends on opening size, temperature rise and wind movement.
2-1999: Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size
ASHRAE Standard 55-2004: Thermal Environmental Conditions for Human Occupancy
ASHRAE Standard 62.
A combination HEPA filter and an activated charcoal filter are needed to make ventilation air totally safe from biological and radioactive contaminates.
A fan or blower draws ventilation air into the building through tiny holes in the collectors and up through the air space between the collectors and the south wall.
Combustion air and ventilation air — The ductwork installed to bring fresh, outside air to the furnace or boiler room. Normally two separate supplies of air are brought in: one high for ventilation and one low for combustion.
HVAC
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It also provides a means of distributing ventilation air.
A hot water (hydronic) system distributes heat through hot water pipes and radiators.
distribution (distribution, f.) The transfer of ventilation air into and out of rooms or other confined spaces inside a building's envelope.
 See also: Ventilation, Outside, Window, Heating, Moisture
  
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