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2. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   The energy cost of heating is one of the main costs of operating a building in a cold climate. Some central heating plants can switch fuels for reasons of economy and convenience; for example, a home owner may install a wood-fired furnace with electrical backup for occasional unattended operation.

3. 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 ...

4. Dave Lennox - Wikipedia

   en.wikipedia.org/wiki/Dave_Lennox

   According to company records, the sales price was $57,789.14. Norris began operating the company under the name Lennox Furnace Company . The company grew across the United States throughout the first half of the 20th century, expanded into the air conditioning industry in the early 1950s, and was renamed Lennox Industries.

5. 11 must-see astronomy events in 2025 - AOL

   www.aol.com/weather/11-must-see-astronomy-events...

   Get organizers for all of your Christmas decorations on sale now for as low as $10. AOL. This foldable storage shelf is on sale for under $60: 'It is like a magic act' AOL.

6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   firefox-startpage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Home fuel cell - Wikipedia

   en.wikipedia.org/wiki/Home_fuel_cell

   Additionally, a home fuel cell may be combined with a traditional furnace that produces only heat. For example, the German company Viessmann produces a home fuel cell with an electric power of 0. kW and a thermal power of 1 kW, integrated with a traditional 19 kW heat producing furnace, using the grid for electricity needs below and above the ...