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2. 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 ...

3. Baffle (heat transfer) - Wikipedia

   en.wikipedia.org/wiki/Baffle_(heat_transfer)

   Cross-sectional diagram of stirred tank reactor. Baffles are flow-directing or obstructing vanes or panels used to direct a flow of liquid or gas. It is used in some household stoves [1] and in some industrial process vessels (tanks), such as shell and tube heat exchangers, chemical reactors, and static mixers.

4. Ventilation (architecture) - Wikipedia

   en.wikipedia.org/wiki/Ventilation_(architecture)

   The furnace, built on the outside of the workshop, featured earthen pipe-like air vents with hundreds of tiny holes in them and a prototype chimney to ensure air goes into the furnace to feed the fire and smoke comes out safely. [39] Passive ventilation and passive cooling systems were widely written about around the Mediterranean by Classical ...

5. Window deflector - Wikipedia

   en.wikipedia.org/wiki/Window_deflector

   Based on the way wind deflectors are installed, they may be classified as follows: In-Channel This type of deflectors is installed into the upper window channel, and is kept in place due to tension. In some applications, this type of deflector also employs a thin stripe of automotive-grade 3M tape to keep the deflector in place. Stick-on

6. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   Window and central air conditioning in the 1960s caused many companies to discontinue production of fans, [12] but in the mid-1970s, with an increasing awareness of the cost of electricity and the amount of energy used to heat and cool homes, turn-of-the-century styled ceiling fans became popular again as both decorative and energy-efficient.

7. Smoke deflectors - Wikipedia

   en.wikipedia.org/wiki/Smoke_deflectors

   Various styles of smoke deflectors have been used by different railway operators. However, many are essentially a variation of one of two designs of Windleitbleche (wind deflecting plates) developed by the Deutsche Reichsbahn-Gesellschaft (the German State Railway Company) between the World Wars: the earlier, larger Wagner-type deflector, and the later, smaller Witte-type deflector, such as ...