Questions tagged [air-quality]

Questions about the control, measurement and regulation of air contaminants impacting public health and/or visibility. Do not use this tag for questions specific to greenhouse gases and climate impact.

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Do high speed trains use ventilation and filtration systems similar to aircraft?

This article discusses the ventilation and filtration in aircraft: Ventilation rates provide a total change of air 20 to 30 times per hour. Most modern aircraft have recirculation systems, which ...
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EU EN standard 1822 vs US HEPA filters

There's a EU EN standard 1822 for air filters that has seen several iterations. The pre-2009 versions of EN 1822 (which seems to have come out in 1998) were pretty confusing as they allowed poorer ...
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Single Split Air Conditioner & Supply/Exhaust Fan

First Question Does single split AC (the type with evaporator indoor and compressor outdoor) vent or exhaust air outside and thereby create negative air pressure in the room? Reason being I am ...
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How to purify/treat air smell produced by a kitchen?

Ignore the ugly look. Sometimes I cooked food with very strong smell. That smell sometimes is not expected by many neighbors, they protested. Rather than to use exhaust fan, I considered to install ...