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 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 different
The first high-performance calorifier, Modul-plus, still guarantees the highest levels of hot water comfort today, performing 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 time.
Hoval receives its first heating surfaces patent for the "Fischgratrohr" design, 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 unit for ventilating industrial halls with heat recovery. Use of these units reduces heating energy needs by up to 60
Registration of a trend-setting patent: the self-cleaning thermolytic heating surface. An entire series of small and medium-sized boilers is named after
this Hoval achievement: their names end in "Lyt".
Hoval develops a unique vortex air distributor, the Air-Injector, for even greater efficiency in the ventilation and heating of industrial halls.
Hoval starts a development project with Ruhrgas Deutschland for gas premix burners. These burners guarantee particularly low levels of emissions during
combustion. The new development enters into series production in 1986 under the name of Ultraclean®.
With the wood gasification boiler, Hoval focuses on gasification technology for biomass for the first time. The three-stage combustion method soon becomes
the market standard.
Research on the most efficient gas condensation design, which was started in 1984, culminates in the patented Hoval aluFer®, a heat exchanger with an
integrated aluminium microstructure. Energy efficiency, cost savings and a long service life are just some of the advantages of a whole generation of
condensing gas 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 halls possible with only one unit.
Hoval launches the MultiJet® oil condensing boiler with a revolutionary heating surface. Its jet technology 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 burners. 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 comfort in the home by means of ventilation systems featuring cooling or humidity control, such as the HomeVent® controlled
residential ventilation system.
After over 20 years of business in China, Hoval founds its first sales company in Asia.
UltraOil®, the first oil condensing unit based on the aluFer® heat exchanger, goes into series production. Today, this is a highly successful range that
generates power outputs of 16 – 200 kilowatts.
The latest 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, Austria.
Hoval introduces the new business sectors of heat transfer stations and combined heat and power plants.