1874 Establishment of Vaillant as a craft workshop for installation work. The 23 year old tailor’s son declares in the newspaper in Remscheid that he has “established himself as a coppersmith and pump manufacturer


1894 Patent for gas bath boiler “closed system”. This boiler permits heating water in a hygienic way for the first time, without the combustion gases condensing into the water. The temperature of the water can also be controlled. This is a groundbreaking innovation in the field of heating technology.


1899 Johann Vaillant adopts the “Easter bunny in an egg” as the trademark of Vaillant. This makes him one of the pioneers in the field of branded products in the German consumer goods industry. The Vaillant bunny is today the most familiar heating technology trademark in Europe.


1905 Wall-hung version of the Vaillant gas bath boiler “Geyser” conquers the world. There is enough space in virtually any room for the convenient hot water preparation system. An innovation which survives to the present day.


1924 Vaillant develops a central heating boiler. It was previously necessary to have an oven or fireplace in each room and this innovation allows heating of all the rooms in a house from a central location. It is now only necessary to have radiators in the rooms.


1943 Vaillant factory buildings in Remscheid are destroyed in an air-raid.


1960 Vaillant introduces another innovation onto the marketplace under the name of “Circo-Geyser MAG-C 20”: The first wall-hung gas-fired circulation water heater.


1967 The “Combi-Geyser VCW 20“ combines, for the first time, heating and hot water supply in a single unit. An innovation which the sector continues to use today. The unit also impresses with short heating times and the heat output being matched to the demand.


1974 Vaillant introduces the first electronically-controlled combi-geyser VCW T3W to the marketplace. The first gas-fired wall-hung boiler with automatic adjustment of the output of the equipment to the demand for heat. This achieves longer working life and better efficiency.


1978 Vaillant offers the first room-air independent wall-hung boiler with a fan. The room where the boiler is hanging no longer needs continuous positive ventilation. The oxygen required for combustion is drawn in from outside. New application technologies are possible.


1983 Introduction of the Termoblock range with stainless steel heat-exchanger, continuous modulation (40-100%) and electronic ignition. These innovations result in longer working life, reduced consumption and comfortable operation of the equipment.


1991 Vaillant sets new standards with the introduction of the low toxicity Thermoblock. This is the first fully-mixing atmospheric burner with water cooling in the world.


1996 Start of the in-house production of wall hung boiler with high efficiency condensing technology.


1997 Completion of the product range by solar-thermal systems for heating drinking water. An initial important step in the expansion of the range of systems based on renewable energy sources.


1999 125 years of Vaillant – 40 million units supplied. Quality process 'Vaillant Excellence' (since 1996) bears fruit: Vaillant wins the German quality prize.


2001 At the International Sanitary and Heating Exhibition (ISH) in Frankfurt a prototype of a fuel cell heating unit by Vaillant produces heat and power in the exhibition hall 24 hours a day for a period of five days.


2001 Launch of the Vaillant Compact Unit range. The system combines the heating boiler and domestic hot water cylinder in a compact optimally-matched component group. This ensures efficient operation and simple installation.


2002 Vaillant is the first company to start a Europe-wide field testing programme for fuel-cell boilers called the “Virtual Fuel Cell Power Plant”. 10 European partners participate in the project and it has a value of 8.6 million Euros.


2003 Vaillant sets the standard for remote monitoring and control of boilers, heat pumps and solar systems with the on-line communication system vrnetDialog. For the first time it is possible to monitor and adjust a heating system from afar.


2004 Launch of Co-Sensor. For the first time the quality of combustion of a boiler is measured with a CO sensor and is continuously monitored and optimised. – Innovation prize from the German Gas Industry.


2006 Introduction of the oil-fired condensing boiler icoVIT with optimum energy utilisation and low toxicity combustion. This generation of equipment makes oil a real alternative to gas condensing technology from the point of view of emissions.


2007 The production of their own air-water heat pumps means that Vaillant is extending the product range of systems for renewable energies. The Vaillant heat pump achieves winner status in consumer goods tests (Stiftung Warentest).