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  2. Heating, ventilation, and air conditioning - Wikipedia

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

    Free cooling systems can have very high efficiencies, and are sometimes combined with seasonal thermal energy storage so that the cold of winter can be used for summer air conditioning. Common storage mediums are deep aquifers or a natural underground rock mass accessed via a cluster of small-diameter, heat-exchanger-equipped boreholes.

  3. Continuous emissions monitoring system - Wikipedia

    en.wikipedia.org/wiki/Continuous_emissions...

    CEM systems can also measure air flow, flue gas opacity and moisture. A monitoring system that measures particulate matter is referred to as a PEMS. In the U.S., the EPA requires a data acquisition and handling system to collect and report the data. Measurements of concentration can be converted to mass/hour by including flow rate measurements.

  4. The Best Place to Put a Carbon Monoxide Detector (and 5 ... - AOL

    www.aol.com/lifestyle/best-place-put-carbon...

    Leaks from the furnace, water heater, or other appliances can release invisible carbon monoxide into your home. Correctly installing an alarm can keep you safe. The Best Place to Put a Carbon ...

  5. Air pollution measurement - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_measurement

    Urban air quality index (AQI) values are computed by combining or comparing the concentrations of a "basket" of common air pollutants (typically ozone, carbon monoxide, sulfur dioxide, nitrogen oxides, and both fine and coarse particulates) to produce a single number on an easy-to-understand (and often colour-coded) scale. [63]

  6. Erie fire officials open free detector giveaway to homeowners ...

    www.aol.com/news/erie-fire-officials-open-free...

    The Erie Bureau of Fire is opening its free smoke/carbon monoxide giveaway program to all homeowners in Erie County, with distribution set this week

  7. Catalytic heater - Wikipedia

    en.wikipedia.org/wiki/Catalytic_heater

    The American Gas Association standards specify that the concentration in free air of carbon monoxide from a gas heater should not exceed 200 parts per million (ppm). Conversely, since catalytic heaters are flameless, there is a reduced fire risk.

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