| ab 1900 | Bau von Dampflokomotiven im Werk Maribor ( ehem. Marburg ), Slovenien |
| 1957 | WVT founded in Cologne as family-run enterprise by Karl-Wilhelm Prochnow |
| 1960 bis 1972 | Development and patenting of flue gas dust collectors and hot gas blowers |
| 1974 | To expand manufacturing capacities, production and administration move to the favourably-situated town of Untereschbach directly on the autobahn BAB 4 |
| 1979 | Own biomass furnace system patented under the registered trademark: "Bioflamm®" |
| 1982 bis 1985 | Development of a distribution network with partners in Germany, Austria, Switzerland, Italy, the Netherlands, England and the USA |
| 1983 | Delivery of two boiler plants to Haiti for recovery of oils from roots |
| 1984 | TÜV report on quick controllability pursuant to DIN 4751 |
| 1988 | Licensing of the company Siegel LTDA, Agrolandia, for production and sale of Bioflamm® furnaces in Brazil |
| 1989 | Extension of capacities by building a new production hall and extension of the administrative building at Untereschbach |
| 1990 | Delivery of the first Bioflamm® furnaces in combination with steam boilers to the companies Schütte-Lanz GmbH and Allgäu Pharma GmbH |
| 1992 | The first plant for thermal oil heating in combination with a Bioflamm® furnace is constructed at a German door manufacturing plant |
| 1992 | Further development of the forehearth system for the compact series (integral furnace) |
| 1992 | Use of the first PLC in a Bioflamm® furnace |
| 1993 | Acquisition of the manufacturing plant in Maribor (Slovenia) and monitoring of quality by TÜV Bavaria |
| 1993 bis 1996 | WVT acquires a name for itself as municipal and commercial energy supplier by delivering numerous plants for local and district heating. (The first public wood heating plants in North Rhine-Westphalia, Schleswig Holstein, Rhineland Palatinate, Hesse and Mecklenburg-Vorpommern come from us.) |
| 1994 | Delivery of a furnace for rape groats for the research project "decentralised energy generation from rape" with the support of the Ministry for Economics of the state of North Rhine-Westphalia |
| 1997 | Delivery of the first wood pellet boiler to Sweden |
| Delivery of the biggest single plant so far (6 MW) to a wood processing plant in Italy for use of chipboard residues | |
| 1998 | Participation in the research project: "Development of cogeneration of heat and power on the basis of a Stirling engine in conjunction with high temperature ceramics" with the support of the EU |
| 2000 | Business interests of K. W. Prochnow handed over to the Biedenkopf family for age-related reasons |
| 2001 | Advancement award from the state of North Rhine-Westphalia for the wood heating plant in Lieberhausen |
| 2003 | Delivery of a furnace for a pilot project for use of horse litter at the Olympia-Reitanlagen GmbH in Munich. |
| The first welding robot starts work | |
| 2004 | Opening of a sales office in France |
| 2004 | Delivery of a furnace for the research project "FLOX Burner" at the Institute for Process Engineering and Steam Boilers at the University of Stuttgart |
| 2005 | The two boiler plants in St. Marie aux Mines win an award as technologically most innovative plant in Alsace |
| 2005 | The founder of the company Karl-Wilhelm Prochnow passes away on 26 December |
| 2005 bis 2007 | Numerous Bioflamm® furnaces for heating of grain driers delivered to Bavaria, Austria and Hungary. WVT celebrates its 50th anniversary. |
| 2006 | Delivery of a 3 MW furnace to heat a thermal oil heater in a saw works and chipboard plant in Siberia |
| 2007 | Lieferung der zehnten Biomasse-Kesselanlage für den Wärmecontractor EDG in Rheinland -Pfalz |
| 2008 | Einführung des Visualisierungs- und Pufferspeichermanagementsystems „Easy-Graph“ |
| 2010 | Entwicklung einer neuen Kesselbaureihe TRF / SRF mit Dreizug Flammrohr- Rauchrohrkessel |
| 2013 | Lieferung von Feuerungs- und Regeltechnik für pelletgefeuertes Dampferzeugersystem „Susteamer“ |