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  2. Heating, ventilation, and air conditioning - Wikipedia

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

    Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality .

  3. Category:Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Category:Heating...

    Air Conditioning, Heating and Refrigeration Institute; Air door; Air handler; Air Infiltration and Ventilation Centre; Air Movement and Control Association; Air source heat pump; Air-mixing plenum; Airflow; Airflow window; American Residential Services; ASHRAE; Annual fuel utilization efficiency; Aquastat; ASHRAE 55; ASHRAE 90.1; ASHRAE ...

  4. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized terms and acronyms, many ...

  5. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  6. Duct (flow) - Wikipedia

    en.wikipedia.org/wiki/Duct_(flow)

    Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a negative pressure of 200 Pa. To use flexible ducting in a system, make sure to pull the duct tight so you get the full internal diameter.

  7. 12 Tips for Healthy Holiday Eating

    www.aol.com/12-tips-healthy-holiday-eating...

    1. Choose Your Guilt-Free Days Carefully. Whether you’re on a weight loss journey or just trying to stay fit, you don’t need to avoid all the festive foods you love. But you also don’t need ...

  8. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space.

  9. The 15 best early Black Friday sales this weekend: Toys ... - AOL

    www.aol.com/lifestyle/the-15-best-early-black...

    If you're unfamiliar, the Toniebox is an imagination-building, screen-free digital audio toy that plays stories, sings songs and more. It is designed to foster imagination and independent active ...