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

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

    For premium support please call: 800-290-4726 more ways to reach us

  3. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Because of its shape, the trap retains some water after the fixture's use. This water creates an air seal that prevents sewer gas from passing from the drain pipes back into the building. Essentially all plumbing fixtures including sinks, bathtubs, and showers must be equipped with either an internal or external trap.

  4. 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.

  5. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    [2] [3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [4] Heat pumps are similar in many ways to air conditioners, but use a reversing valve to allow them both to heat and to cool an enclosed space. [5]

  6. 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 ...

  7. 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.

  8. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    Copper tubing is available in four wall thicknesses: type DWV (thinnest wall; only allowed as drain pipe per UPC), type 'M' (thin; typically only allowed as drain pipe by IPC code), type 'L' (thicker, standard duty for water lines and water service), and type 'K' (thickest, typically used underground between the main and the meter).

  9. 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 ...

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