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2. Kalai (process) - Wikipedia

   en.wikipedia.org/wiki/Kalai_(process)

   After the cleaning, the vessel is heated on burning coal for about 2 to 3 minutes. The Kalaiwala, Kalaigar or Kalaikar then digs a small pit in the ground to burn the coal. He/she prepares a temporary blast furnace to do kalai and blows air through bellows. After the vessel turns pinkish hot, virgin grade tin (in the form of strips) is applied ...

3. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   This limit controller may shut the furnace off if the blower fails or if something is blocking the air flow. The heated air is then sent back through the home through supply ducts. In larger commercial applications, central heating is provided through an air handler which incorporates similar components as a furnace but on a larger scale.

4. Furnace (central heating) - Wikipedia

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

   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 compared to a mid-efficiency forced-air or forced-draft furnace, is the capture of latent heat from the exhaust gases in the secondary heat exchanger.

5. Vietnam’s ‘blazing furnace’ sees real estate mogul sentenced ...

   www.aol.com/finance/vietnam-blazing-furnace-sees...

   The fraud is equivalent to 3% of the country's GDP. Vietnam’s ‘blazing furnace’ sees real estate mogul sentenced to death for $12 billion fraud.

6. 39 students, staff, EMS workers hospitalized after furnace ...

   www.aol.com/39-students-staff-ems-workers...

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7. Thanksgiving Day Disaster - Wikipedia

   en.wikipedia.org/wiki/Thanksgiving_Day_Disaster

   Approximately 20 minutes after kickoff, the ventilator roof collapsed due to the excessive load. [4] Of the hundreds of people on the roof, at least 100 people fell four stories to the factory floor. Sixty to 100 more people fell directly on top of the furnace, the surface temperature of which was estimated to be around 500 °F (260 °C).

8. After Hell is Real, the furnace is about to get cranked up on ...

   www.aol.com/hell-real-furnace-cranked-columbus...

   Not to diminish Hell is Real, but after losing to Cincinnati 2-1 in the Hell is Real derby-darby in Columbus, the Crew will be truly temperature tested in the weeks to come. It’ll be a miracle ...

9. Forced-air - Wikipedia

   en.wikipedia.org/wiki/Forced-air

   Heat is produced via combustion of fuel. A heat exchanger keeps the combustion byproducts from entering the air stream. A ribbon style (long with holes), inshot (torch-like), or oil type burner is located in the heat exchanger.