07/31/2010 04:22

frequently asked questions about Hvac

  What do rating numbers mean?The U.S. government requires an efficiency rating of all air conditioning and heating equipment. The rating reflects the percentage of energy used efficiently, with a high rating indicating high-efficiency. What is a SEER? There are special names for the...
07/31/2010 04:21

Tips to Lower Heating/Air Conditioning Bills

  Perform an energy audit. Many utility companies offer a free home energy audit to customers and it's well worth taking advantage of this free service. Install Ceiling Fans. Keep the air circulating in your home and your air conditioner won't have to work as hard. Install an Attic Fan. It...

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HVAC (pronounced either "H-V-A-C" or /ˈeɪtʃˌvæk/) is an acronym that stands for the closely related functions of "Heating, Ventilating, and Air Conditioning"—the technology of indoor or automotive environmental comfort. HVAC system design is a major subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).

HVAC is particularly important in the design of medium to large industrial and office buildings such as skyscrapers and in marine environments such as aquariums, where safe and healthy building conditions are regulated with temperature and humidity, as well as "fresh air" from outdoors.

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    Technician Evaluation   This is a multiple choice exam that tests your fundamental HVAC knowledge. This exam is often used as a pre-employment exam EPA Section 608   This exam is a practice test for the EPA Section 608 Technician Certification NEC...