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2. Weird sounds and smells in your home you should never ignore

   www.aol.com/weird-sounds-smells-home-never...

   The worst-case scenario is if the smell is coming from an electrical outlet or a switch. If this happens, hit the breaker to stop the flow of electricity to it.

3. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   Each room has an outlet from the duct system, often mounted in the floor or low on the wall – some rooms will also have an opening into the cold air return duct. Depending on the age of the system, forced-air gas furnaces use either a pilot light or a solid-state ignition system (spark or hot surface ignition) to light the natural gas burner. [3]

4. 'Unusual' smell prompts school closure

   www.aol.com/unusual-smell-prompts-school-closure...

   Contractors later discovered a seized motor on one of the school's convector heaters causing a burning smell to permeate the building. The school said there had been no risk of fire as the heater ...

5. Heating, ventilation, and air conditioning - Wikipedia

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

   Such a system contains a boiler, furnace, or heat pump to heat water, steam, or air in a central location such as a furnace room in a home, or a mechanical room in a large building. The heat can be transferred by convection, conduction, or radiation. Space heaters are used to heat single rooms and only consist of a single unit.

6. Furnace (central heating) - Wikipedia

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

   These furnaces were still big and bulky compared to modern furnaces, and had heavy-steel exteriors with bolt-on removable panels. Energy efficiency would range anywhere from just over 50% to upward of 65% AFUE. This style furnace still used large, masonry or brick chimneys for flues and was eventually designed to accommodate air-conditioning ...

7. Smell smoke in the air in Raleigh today? Here’s where it’s ...

   www.aol.com/smell-smoke-air-raleigh-today...

   North and Northwest Raleigh residents may be noticing the smell of smoke in the air today. This is because a prescribed (or controlled) burn is taking place today at Umstead State Park, said NC ...

8. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   At that time central heating was coming into fashion in Britain, with steam or hot air systems generally being used. Details of furnace and expansion tube from Perkins' 1838 Patent. Perkins' 1832 apparatus distributed water at 200 degrees Celsius (392 °F) through small diameter pipes at high pressure. A crucial invention to make the system ...

9. What’s that smell in the Florida Keys? It’s coming from Cuba ...

   www.aol.com/smell-florida-keys-coming-cuba...

   You can thank the wind for the odor.