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  2. Air-mixing plenum - Wikipedia

    en.wikipedia.org/wiki/Air-mixing_plenum

    The mix of fresh air and recirculated air can thus be adjusted to suit the needs of the building's occupants. Most systems will use motorized dampers to control the air mixing, and controlled by the building management system (BMS), or controls system. Typically as the fresh air and exhaust air dampers are driven from 0% open to 100% open, the ...

  3. Air purge system - Wikipedia

    en.wikipedia.org/wiki/Air_purge_system

    At the air inlet, air temperature must be lower than the upper ambient rating of the fan (typically 50 °C/122 °F). The position of air intake is at a point where the least amount of dust, oil, and moisture collects. Fail safe shutters protect the instrument if the purge air supply fails. These are key in systems where the flue gas is under ...

  4. Air freshener - Wikipedia

    en.wikipedia.org/wiki/Air_freshener

    Air fresheners from Febreze. Air fresheners are products designed to reduce unwanted odors in indoor spaces, or to introduce pleasant fragrances, or both. They typically emit fragrance to mask odors but may use other methods of action such as absorbing, bonding to, or chemically altering compounds in the air that produce smells, killing organisms that produce smells, or disrupting the sense of ...

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.

  6. No-scrub hack for ridding kettle of limescale using only lemons

    www.aol.com/news/hack-cleaning-kettle-limescale...

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  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    fresh air fraction Fresh air fraction quantifies action of the economizer, and is defined by (Mass flow rate of fresh-air / Total air flow rate). Abbreviated faf. fresh air intake An opening through which outside air is drawn into the building. This may be to replace air in the building that has been exhausted by the ventilation system, or to ...

  8. If you do this with lemons, you’re throwing away powerful ...

    www.aol.com/news/lemons-throwing-away-powerful...

    Plus, uses of lemon for cleaning and healthy lemon recipes. The health benefits of lemons, lemon juice and lemon peel, including high vitamin C and hesperidin. Plus, uses of lemon for cleaning and ...

  9. This 2-Minute Trick Makes Lemons So Much Easier to ... - AOL

    www.aol.com/2-minute-trick-makes-lemons...

    Room temperature lemons will soften in just a few minutes, while ice cold lemons may take up to 30-40 minutes to soften in a bowl of warm water. If you’re in a time crunch, try the microwave.