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The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.
Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.
Instead they are placed at some local high point, such as the highest point within a utility cupboard or boiler room, even though this is in a basement. European domestic gas boilers often include such a valve within the boiler casing itself. [1] An air release valve on an elevated section of a large diameter lavender-colored pipe
Škoda-Sentinel "Super Sentinel" steam wagonThe Sentinel boiler was a design of vertical boiler, fitted to the numerous steam wagons built by the Sentinel Waggon Works.. The boiler was carefully designed for use in a steam wagon: it was compact, easy to handle whilst driving, and its maintenance features recognised the problems of poor feedwater quality and the need for it to be maintained by ...
The weight problem was solved by adopting a new type of boiler, designated "Sural" (short for suralimenté [pressure-fired]); these boilers were much more compact than the type used in the Dunkerque class and the Richelieus had a wider beam (allowing three boilers side-by-side instead of just two), so the boiler rooms could be reduced from ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 December 2024. American politician and Army reserve officer (born 1981) Tulsi Gabbard Gabbard in 2024 Director of National Intelligence Presumptive nominee Assuming office TBD [a] President Donald Trump Succeeding Avril Haines Member of the U.S. House of Representatives from Hawaii's 2nd district In ...
The Fremont-Winema National Forest of south central Oregon is a mountainous region with a rich geological, ecological, archaeological, and historical history. Founded in 1908, the Fremont National Forest was originally protected as the Goose Lake Forest Reserve in 1906.
All of the Nazi extermination camps operated on the territory that is now Poland, although Nazi concentration camps were built in Germany and other countries.. The terms "Polish death camp" and "Polish concentration camp" have been controversial as applied to the concentration camps and extermination camps established by Nazi Germany in German-occupied Poland.