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2. Is It Cheaper To Run Space Heaters Or Central Heat? - AOL

   www.aol.com/cheaper-run-space-heaters-central...

   Heating costs for central units also vary depending on variables such as the size and age of the house (older homes tend to be less insulated) and the type of heat. The home’s condition also ...

3. Is Central Air Worth the Cost? Plus, What You Can Do Instead

   www.aol.com/central-air-worth-cost-plus...

   The average cost of both the unit plus installation will ... hot year round,” Sanders said. Central air is also a great way to keep your home comfortable, and who doesn’t want to feel cool and ...

4. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Circulating hot water can be used for central heating. Sometimes these systems are called hydronic heating systems. [22] Common components of a central heating system using water-circulation include: A supply of fuel, electric power or district heating supply lines; A boiler (or a heat exchanger for district heating) which heats water in the system

5. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   In some areas electrical resistance heating is used, especially where the cost of electricity is low or the primary purpose is for air conditioning. Modern high-efficiency furnaces can be up to 98% efficient and operate without a chimney, with a typical gas furnace being about 80% efficient. [ 1 ]

6. Heating, ventilation, and air conditioning - Wikipedia

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

   Air handling unit, used for heating, cooling, and filtering the air. Air cleaning and filtration removes particles, contaminants, vapors and gases from the air. The filtered and cleaned air then is used in heating, ventilation, and air conditioning. Air cleaning and filtration should be taken in account when protecting our building environments ...

7. Heating system - Wikipedia

   en.wikipedia.org/wiki/Heating_system

   Central heating systems: These systems produce heat in one central location and distribute it throughout the building. This category includes furnaces, boilers, and heat pumps. [1] [2] Distributed heating systems: These systems generate heat in the space they are to heat, without extensive duct systems. Examples include electric space heaters ...