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2. Industrial furnace - Wikipedia

   en.wikipedia.org/wiki/Industrial_furnace

   The fluid to be heated passes through the tubes and is thus heated to the desired temperature. The gases from the combustion are known as flue gas. After the flue gas leaves the firebox, most furnace designs include a convection section where more heat is recovered before venting to the atmosphere through the flue gas stack. (HTF=Heat Transfer ...

3. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   A flue liner is a secondary barrier in a chimney that protects the masonry from the acidic products of combustion, helps prevent flue gas from entering the house, and reduces the size of an oversized flue. Since the 1950s, building codes in many locations require newly built chimneys to have a flue liner.

4. Furnace (central heating) - Wikipedia

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

   The vent pipes, also known as the exhaust system, are often installed using PVC pipe instead of metal venting pipe to prevent corrosion, but this will vary based on geographical location of the installation and local regulations. The draft inducer allows for the exhaust piping to be routed vertically or horizontally as it exits the structure.

5. List of boiler types by manufacturer - Wikipedia

   en.wikipedia.org/wiki/List_of_boiler_types_by...

   return-flue boiler: flued boiler with a single large flue that folds back on itself. Used in early steam locomotives. return-tube boiler: fire-tube boiler with multiple small fire-tubes that reverse the direction of gas flow within the boiler. Individual tubes are not folded: there is usually a furnace, a combustion chamber that reverses the ...

6. Boiler - Wikipedia

   en.wikipedia.org/wiki/Boiler

   Early boilers provided this stream of air, or draught, through the natural action of convection in a chimney connected to the exhaust of the combustion chamber. Since the heated flue gas is less dense than the ambient air surrounding the boiler, the flue gas rises in the chimney, pulling denser, fresh air into the combustion chamber. [citation ...

7. Expansion joint - Wikipedia

   en.wikipedia.org/wiki/Expansion_joint

   Pipe expansion joints are necessary in systems that convey high temperature substances such as steam or exhaust gases, or to absorb movement and vibration. A typical joint is a bellows of metal (most commonly stainless steel), plastic (such as PTFE), fabric (such as glass fibre) or an elastomer such as rubber. A bellows is made up of a series ...