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2. Heating, ventilation, and air conditioning - Wikipedia

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

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.

3. Quarter glass - Wikipedia

   en.wikipedia.org/wiki/Quarter_glass

   Quarter glass is also sometimes called a valence window. [2] This window may be set on hinges and is then also known as a vent window, wing window, wing vent window, or a fly window. Most often found on older vehicles on the front doors, it is a small roughly triangular glass in front of and separate from the main window that rotates inward ...

4. Ventilation (architecture) - Wikipedia

   en.wikipedia.org/wiki/Ventilation_(architecture)

   Opening doors and windows are good ways to maximize natural ventilation, which would make the risk of airborne contagion much lower than with costly and maintenance-requiring mechanical systems. Old-fashioned clinical areas with high ceilings and large windows provide the greatest protection.

5. Storm window - Wikipedia

   en.wikipedia.org/wiki/Storm_window

   Storm windows are an inexpensive add-on: even the best storm windows - three track exterior windows with low-E glass – will cost a small fraction of the price of standard replacement windows. Interior storm windows can produce problems of condensation and be visually obstructive; exterior storm windows can have a negative visual effect.

6. Cross ventilation - Wikipedia

   en.wikipedia.org/wiki/Cross_ventilation

   Cross-breezes work when two windows are opposite of each other. Cross ventilation is a natural phenomenon where wind , fresh air or a breeze enters upon an opening, such as a window, and flows directly through the space and exits through an opening on the opposite side of the building (where the air pressure is lower).

7. Power window - Wikipedia

   en.wikipedia.org/wiki/Power_window

   The 1960s Cadillac Fleetwood came standard with power front and rear vent windows, in addition to standard power side windows, for a total of eight power window controls on the driver's door panel. Modern heavy-duty highway tractors frequently have an option for power window controls; however, these are generally what is referred to as ...