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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. Need a new air conditioner? Here's how to find a quality HVAC ...

   www.aol.com/air-conditioner-heres-quality-hvac...

   Summer isn't officially here yet, but it feels like it. Good HVAC contractors are in high demand. Here's how to find one.

4. Dedicated outdoor air system - Wikipedia

   en.wikipedia.org/wiki/Dedicated_outdoor_air_system

   The building model was developed to be consistent with typical new construction and meet the ASHRAE Standard 90.1 (ASHRAE 90.1) requirements. [15] The simulation results indicated that the full DOAS resulted in the annual HVAC energy cost savings ranging from 21% to 38%. [14]

5. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Institutional heating systems (office buildings or schools, for example) can use low-grade, inexpensive bunker fuel to run their heating plants, but capital cost is high compared to more easily managed liquid fuels. Natural gas is a widespread heating fuel in North America and northern Europe. Gas burners are automatically controlled and ...

6. 5 Things You’ll Be Disappointed You Downgraded or Decluttered ...

   www.aol.com/5-things-ll-disappointed-downgraded...

   The new year often brings urges to declutter and downsize to save some money. ... although demand for home heating oil has nudged prices up in recent weeks. ... Even factoring in the average cost ...

7. 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]