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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. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    CFCs and HCFCs refrigerants such as R-12 and R-22, respectively, used within air conditioners have caused damage to the ozone layer, [101] and hydrofluorocarbon refrigerants such as R-410A and R-404A, which were designed to replace CFCs and HCFCs, are instead exacerbating climate change. [102]

  4. Sealegend Dryer Vent Cleaner Kit sale - AOL

    www.aol.com/lifestyle/sealegend-dryer-vent...

    Save 45% now — and money and energy later — with this bestselling dryer vent–cleaning kit at Amazon. ... Map shows congestion pricing will cost up to $27 to drive into Manhattan: Firefighter

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  6. Energy Star - Wikipedia

    en.wikipedia.org/wiki/Energy_Star

    The Energy Star program's savings calculator has also been criticized for unrealistic assumptions in its model that tend to magnify savings benefits to the average consumer. [ 26 ] Another factor yet to be considered by the EPA and DOE is the overall effect of energy-saving requirements on the durability and expected service life of a mass ...

  7. Solar thermal energy - Wikipedia

    en.wikipedia.org/wiki/Solar_thermal_energy

    The largest are about 10,000 m 2 (2½ acres), with capacities of 7 MW-thermal and solar heat costs around 4 Eurocents/kWh without subsidies. [ 9 ] 40 of them have nominal capacities of 1 MW-thermal or more.

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