Gustav Ospelt obtains the authorisation to build heating systems.
The cornerstone is laid: a simple stove gives rise to a central heating system. Gustav Ospelt patents his idea and the EMPA (Swiss Federal
Laboratories for Material Science and technology) confirms its high efficiency in a test report for the first time.
The "Hoval" brand is registered. The name stands for Heating equipment construction Ospelt Vaduz Liechtenstein.
First internationalisation with the establishment of companies in Austria and Switzerland.
The first boiler with an integrated hot water tank, the Hovaltherm, nicknamed "the rocket", revolutionises the European boiler market.
A licence agreement with the Friedrich Krupp steel company for steel boilers generates rapid growth and opens up the German market for Hoval.
Construction of the "Neugut" site in the Vaduz industrial zone. Since then, this has been the headquarters of the Hoval group of companies.
During this decade, companies are founded in Great Britain and Italy, and additional favourable licence agreements are signed.
The first compact combination boiler with separate combustion chambers for liquid, gaseous and solid fuels is ready for the market - in eight
The first high-performance water heater, Modul-plus, still guarantees the highest levels of hot water comfort today, perfoming superbly under
fluctuating peak requirements while meeting the most stringent water hygiene specifications.
Hoval celebrates a milestone: the 100,000th boiler leaves the Vaduz works. In all of Europe, 350,000 Hoval boilers have already been built by this
"Fischgratrohr", or "fish-bone tube", which achieves enormous gains in heat transfer and therefore in efficiency. Further heating surface patents
follow in 1972 and 1979.
Expansion of the product spectrum to include industrial ventilation units and aluminium plate heat exchangers for heat recovery in climate control
and ventilation systems and in processing technology.
Introduction of a decentralised device for ventilating industrial halls with heat recovery. Use of this device reduces heating energy needs by up to
Registration of a trend-setting patent: the self-cleaning thermolytic heating surface. An entire series of small and medium-sized boilers is named
for the Hoval achievement: their names end in "Lyt".
Hoval starts a development project with Ruhrgas Deutschland for gas premix burners. These burners guarantee particularly low levels of pollutants
during combustion. The new development enters into series production in 1986 under the name of Ultraclean®.
Hoval develops a unique vortex air distributor, the Air-Injector, for even greater efficiency in the ventilation and heating of industrial
With the wood gasification boiler, Hoval introduces gasification technology for biomass. The three-stage combustion method soon becomes the market
Research on the most efficient condensing technology culminates in the patented Hoval aluFer®, a heat exchanger with an integrated aluminium
microstructure. Energy efficiency, cost savings and a long service life are only some of the advantages of a whole generation of gas condensing units,
which first went into series production in 1994.
The patented technology of the first Hoval recirculation cooling unit makes cost-effective heating and cooling of high spaces possible with just one
Hoval launches the MultiJet® oil condensing boiler, with a revolutionary heating surface. Its technology with jet inserts achieves optimal heat
transfer levels, resulting in excellent efficiency, very quiet running and an exceptionally compact design.
The use of alternative energies enters a new dimension with the development of the horizontal tube burner for pellet boilers. Efficient, compact,
reliable and comfortable - these words describe the conversion of wood to heat by the BioLyt series (2005).
Hoval expands its worldwide sales network to include its own branch offices in Poland, the Czech Republic and Slovakia.
Hoval develops a special sorption coating for thermal wheels, which transfers not only heat but also humidity. This technology creates a constant,
pleasant indoor climate and superb living comfort by means of ventilation systems featuring cooling or humidity control, such as the HomeVent® controlled
home ventilation system.
After over 20 years of doing business in China, Hoval establishes its first sales company in Asia.
UltraOil®, the first oil condensation unit based on the aluFer® heat exchanger, goes into series production. Today, this is a highly successful
product group that generates power outputs of 16 to 200 kilowatts.
The newest Hoval sales companies open their doors in Romania, Spain, France and Croatia.
Environmentally friendly cooling with refrigerant-free recirculation, not only reducing water consumption but achieving maximum adiabatic efficiency
Hoval invests in the production of heat pumps with Wärmepumpen GmbH in Matrei (WPM), East Tyrol.
Hoval introduces a new business sector of heat transfer stations and combined heat and power plants.