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  2. Indoor air quality - Wikipedia

    en.wikipedia.org/wiki/Indoor_air_quality

    Indoor air quality (IAQ) is the air ... Testing emissions ... Environmentally sustainable design concepts include aspects of commercial and residential heating ...

  3. Blower door - Wikipedia

    en.wikipedia.org/wiki/Blower_door

    Testing building envelopes and window frames for water tightness and rain penetration; NFPA Clean Agent Retention testing (this type of testing is usually described as a door fan test rather than a blower door test) Duct leakage testing of forced air heating/cooling systems - both supply (vents) ducts and return ducts can be tested to determine ...

  4. Building airtightness - Wikipedia

    en.wikipedia.org/wiki/Building_airtightness

    The relationship between pressure and leakage air flow rate is defined by the power law between the airflow rate and the pressure difference across the building envelope as follows: [16] q L =C L ∆p n. where: q L is the volumetric leakage airflow rate expressed in m 3 h −1; C L is the air leakage coefficient expressed in m 3 h −1 Pa −n

  5. Testing, adjusting, balancing - Wikipedia

    en.wikipedia.org/wiki/Testing,_adjusting,_balancing

    In heating, ventilation, and air conditioning (HVAC), testing, adjusting and balancing (TAB) are the three major steps used to achieve proper operation of heating, ventilation, and air conditioning systems. TAB usually refers to commercial building construction and the specialized contractors who employ personnel that perform this service.

  6. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Ventilating or ventilation (the "V" in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and ...

  7. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    US counties that are designated "nonattainment" for the Clean Air Act's NAAQS, as of September 30, 2017. The U.S. National Ambient Air Quality Standards (NAAQS, pronounced / ˈ n æ k s / naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. [1]

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