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2. 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.

3. Process duct work - Wikipedia

   en.wikipedia.org/wiki/Process_Duct_Work

   Process duct work may be round or rectangular. Although round duct work costs more to fabricate than rectangular duct work, it requires fewer stiffeners and is favored in many applications over rectangular ductwork. The air in process duct work may be at ambient conditions or may operate at up to 900 °F (482 °C).

4. Testing, adjusting, balancing - Wikipedia

   en.wikipedia.org/wiki/Testing,_adjusting,_balancing

   In heating, ventilation, and air conditioning (HVAC), testing, adjusting and balancing (TAB) are the three major steps used to achieve proper operation of heating, ventilation, and air conditioning systems.

5. Bitter cold in forecast: December set for 'coldest start' in ...

   www.aol.com/bitter-cold-forecast-december-set...

   Through Dec. 9, the western half of the U.S. is forecast to have above normal or near normal temperatures, the agency says. The extended U.S. temperature forecast for Dec. 5-9. Follow Mike Snider ...

6. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

7. 24-year-old man dies after being electrocuted while hanging ...

   www.aol.com/news/24-old-man-dies-being-201507562...

   A 24-year-old California man was electrocuted and died while hanging Christmas lights on Thursday, according to officials. Antonio Pascual was hanging Christmas lights the morning of Nov. 21 on a ...