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2. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Electric heating or resistance heating converts electricity directly to heat. Electric heat is often more expensive than heat produced by combustion appliances like natural gas, propane, and oil. Electric resistance heat can be provided by baseboard heaters, space heaters, radiant heaters, furnaces, wall heaters, or thermal storage systems.

3. Independent Electrical Contractors - Wikipedia

   en.wikipedia.org/wiki/Independent_Electrical...

   Independent Electrical Contractors (IEC) is a non-profit trade organization for merit shop electrical and systems contractors. It is based in Arlington, Virginia. [ 1 ] IEC is a member of the U.S. Occupational Safety and Health Administration (OSHA) Alliance program.

4. Mechanical, electrical, and plumbing - Wikipedia

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

   Heating, cooling, ventilation and exhaustion are all key areas to consider in the mechanical planning of a building. [4] In special cases, water cooling/heating, humidity control or air filtration [5] may also be incorporated. For example, Google's data centres make extensive use of heat exchangers to cool their servers. [6]

5. Radiator (heating) - Wikipedia

   en.wikipedia.org/wiki/Radiator_(heating)

   A radiator is a device that transfers heat to a medium primarily through thermal radiation.In practice, the term radiator is often applied to any number of devices in which a fluid circulates through exposed pipes (often with fins or other means of increasing surface area), notwithstanding that such devices tend to transfer heat mainly by convection and might logically be called convectors.

6. National Electrical Contractors Association - Wikipedia

   en.wikipedia.org/wiki/National_Electrical...

   NECA currently has 119 local chapters across the United States, with a national headquarters in Washington, D.C. At the local level, each NECA chapter is an independently chartered organization with the autonomy to elect officers, determine priorities, set member dues and service charges, and help negotiate labor agreements with their local International Brotherhood of Electrical Workers (IBEW ...

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