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2. 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 ...

3. Heating, ventilation, and air conditioning - Wikipedia

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

   HVAC technicians in the US can receive training through formal training institutions, where most earn associate degrees. Training for HVAC technicians includes classroom lectures and hands-on tasks, and can be followed by an apprenticeship wherein the recent graduate works alongside a professional HVAC technician for a temporary period. [56]

4. List of construction trades - Wikipedia

   en.wikipedia.org/wiki/List_of_construction_trades

   The following is a list of trades in construction. Bell hanger installs mechanical and electrical bell systems. Boilermaker, works in nuclear, oil and gas industry, shipyards, refineries, and chemical plants, on boilers, pressure vessels, and similar equipment. Carpenter, a craftsperson who performs carpentry, building mainly with wood. [1]

5. What is trade school?

   www.aol.com/finance/trade-school-193708632.html

   Occupation. Annual Base Salary Range. Medical Lab Technician. $37k – $63k. Head chef. $31k – $73k. Computer programmer. $44k – $112k. Cosmetologist. $20k – $60k

6. Gen Z Is Overestimating the Average Starting Salary by $50K ...

   www.aol.com/finance/gen-z-overestimating-average...

   In 2019, the college students surveyed by Clever expected to make $57,964 — about $10,000 more than the average starting salary at the time, which was $47,000. Just three years later, college ...

7. Variable refrigerant flow - Wikipedia

   en.wikipedia.org/wiki/Variable_refrigerant_flow

   Variable refrigerant flow. Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller -based ...