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2. Heating, ventilation, and air conditioning - Wikipedia

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

   The first residential AC was installed by 1914, and by the 1950s there was "widespread adoption of residential AC". [ 13 ] The invention of the components of HVAC systems went hand-in-hand with the Industrial Revolution , and new methods of modernization, higher efficiency, and system control are constantly being introduced by companies and ...

3. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Residential central air systems are usually from 1 to 5 tons (3.5 to 18 kW) in capacity. [ citation needed ] The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of ...

4. Mechanical, electrical, and plumbing - Wikipedia

   en.wikipedia.org/wiki/Mechanical,_electrical...

   In residential and commercial buildings, these elements are often designed by specialized MEP engineers. MEP's design is important for planning, decision-making, accurate documentation, performance- and cost-estimation, construction, and operating/maintaining the resulting facilities. [1]

5. Accused killer asked how to get away with murder - court - AOL

   www.aol.com/accused-killer-asked-away-murder...

   She continued: "He came back on to me and he was continuously stabbing me. "I said: 'Please stop, I've got children.' And then I think that's when he started to go, he walked away."

6. Duct (flow) - Wikipedia

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

   Round duct is made using a continuous spiral forming machine which can make round duct in nearly any diameter when using the right forming die and to any length to suit, but the most common stock sizes range evenly from 4" to 24" (10-60 cm) with 6"-12" (15-30 cm) being most commonly used. Stock pipe is usually sold in 10' (300 cm) joints.

7. When to Use Salted vs. Unsalted Butter, According to Our ...

   www.aol.com/lifestyle/salted-vs-unsalted-butter...

   The straight facts about our favorite fat. As a highly opinionated group, our team doesn’t always agree on some key culinary questions.