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  2. What to Know Before Hiring an HVAC Contractor - AOL

    www.aol.com/news/know-hiring-hvac-contractor...

    Sep. 22—(Family Features) For many homeowners, the heating, ventilation, and air-conditioning (HVAC) system is among the home's most important, and most costly, features.

  3. Heating, ventilation, and air conditioning - Wikipedia

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

    The three major functions of heating, ventilation, and air conditioning are interrelated, especially with the need to provide thermal comfort and acceptable indoor air quality within reasonable installation, operation, and maintenance costs. HVAC systems can be used in both domestic and commercial environments.

  4. Energy Bills Could Be Even Higher in Fall Than in Summer: 6 ...

    www.aol.com/energy-bills-could-even-higher...

    “The better you can insulate and prevent heat loss in the winter, the less your heating system will need to run, and the less it will cost you,” Gallagher said. Keep Up With System Maintenance

  5. Best HVAC Systems 2024: Energy Efficiency and Cost Savings - AOL

    www.aol.com/best-hvac-systems-2024-energy...

    Cost Efficiency: Advanced HVAC systems are more energy-efficient, which significantly lowers electricity bills. Automated adjustments and smart thermostats avoid unnecessary energy use, making ...

  6. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [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 ...

  7. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    The energy efficiency ratio (EER) of a particular cooling device is the ratio of output cooling energy (in BTUs) to input electrical energy (in watt-hours) at a given operating point. EER is generally calculated using a 95 °F (35 °C) outside temperature and an inside (actually return-air) temperature of 80 °F (27 °C) and 50% relative humidity.

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