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2. Vacuum interrupter - Wikipedia

   en.wikipedia.org/wiki/Vacuum_interrupter

   30 year old Siemens vacuum interrupter. The contacts carry the circuit current when closed, forming the terminals of the arc when open. They are made of a variety of materials, depending on the vacuum interrupter's use and design for long contact life, rapid recovery of voltage withstand rating, and control of overvoltage due to current chopping.

3. Average Life Span of the Appliances in Your Home - AOL

   www.aol.com/average-life-span-appliances-home...

   Make it last: Maximize the lifespan by adjusting the freezer setting to 0 degrees F. and the refrigerator to 36 to 37 degrees. These are the best compromises between efficient food handling/safety ...

4. Heating system - Wikipedia

   en.wikipedia.org/wiki/Heating_system

   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, fireplaces, and solar heating. [3]

5. “Timestamped Pictures”: 50 Random Things People Did That ...

   www.aol.com/55-things-people-did-just-020043615.html

   Old furnace was replaced immediatly and its wonderful, and costs so much less every month compared to the old rickety furnace. ... I’m about 25 years old, first job out of school, studied game ...

6. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   Older furnaces sometimes relied on gravity instead of a blower to circulate air. [1]Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas.A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [2]

7. Furnace (central heating) - Wikipedia

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

   The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...

8. “What’s The Most Frugal Thing You Do?” (50 Answers) - AOL

   www.aol.com/people-shared-66-most-frugal...

   Between that and landscaping cast-off that I stumble across, I have not had to buy firewood for many years (I also have a natural gas furnace but usage is reduced to less than 1/4). #26

9. Gas heater - Wikipedia

   en.wikipedia.org/wiki/Gas_heater

   A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane. Indoor household gas heaters can be broadly categorized in one of two ways: flued or non-flued, or vented and unvented .