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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.
Vanderbilt boiler An American design, similar to the Lentz and large launch-type boilers. [36] Velox boiler: [61] vertical boiler: flued or fire-tube designs where the main shell is a cylinder on a vertical axis, rather than horizontal. Boilers of this external form may have a great variety of internal arrangements.
Combination boilers are popular in Europe where market share in some countries is in excess of 70%, with a projected rise in the United Kingdom to 78% by 2020. [3] This trend is attributed in part by a social trend towards more numerous but smaller households and an ever-increasing trend towards physically smaller and often high density housing.
The only railway use of water-tube boilers in any numbers was the Brotan boiler, invented by Johann Brotan in Austria in 1902, and found in rare examples throughout Europe, although Hungary was a keen user and had around 1,000 of them. Like the Baldwin, it combined a water-tube firebox with a fire-tube barrel.
George Eman Vaillant (/ v ə ˈ l æ n t /; born June 16, 1934) is an American psychiatrist and Professor at Harvard Medical School and Director of Research for the Department of Psychiatry, Brigham and Women's Hospital.
Combi boiler, a kind of central heating boiler which is popular in Europe; Combi (car style), also known as a station wagon or estate car; Combi coupé, a term used by Saab for some of its hatchback automobile models; Combi steamer, an oven type used for baking with dry heat, steam heat, or a combination of both to yield humidity control
In fact Vaillant reports the dismal fact that fully 95% of the Clinic sample had relapsed at some time during the 8-year study period. [53] [54] Vaillant noted that clinical treatment helped only in the short term, as crisis intervention and detox. There was one indicator, a financial one, of short-term success: clinical intervention had ...