A small company called Thermovür is created with the aim of manufacturing and selling gas-oil and fuel-oil burners.

The founders were two brothers-in-law, both named Angelo Rigamonti, supported by the skills and vast management capabilities of Emilio Rigamonti, father of the youngest Angelo and father-in-law of the other.

The production range expands to include floor-standing warm air heaters for industrial and residential installations.

Another company, AERMAX, is established to support Thermovür in the marketing of floor-standing warm air heaters and burners in foreign markets.

The heating market undergoes quick changes: the booming house building industry and the increasing need of comfort urge the development of new and diversified products.

Thermovür and Aermax keep up with the fast pace of the market.

Their range constantly widens to include: floor standing boilers made of cast iron (1976) and of steel (1978), gas burners (1979), wall boilers entirely made of copper (1980), wall boilers with immersed coil and suspended boilers with quick heat exchange (1983).

The range of warm air heaters for industrial use includes suspended gas-fired warm air heaters. Their main feature is a stainless steel furnace with a patented bag heat exchanger made of steel. In 1988, another product integrates the family: a suspended gas-fired warm air heater with stainless steel furnace and tower-shaped heat exchanger.

The product range further expands to include gas convectors.

Thermovür and AERMAX merge into a single production and business unit, taking advantage of the skills, experience and know-how of both: APEN GROUP SPA (APEN stands for Companies for new energy).

The product range of Apen Group S.p.A. constantly evolves. In 1995, the whole range of warm air heaters passes the tests and it is approved for compliance with EC regulations.

In the same year, our R&D staff completes the study for PKA.N, a new series of floor standing heaters, and DORICO air conditioners with pre-mixed gas burner.

They both include a highly efficient stainless steel heat exchanger and are approved according to EC standards.

In 1997 the gas convector range is enlarged with the introduction of the Full series.

These gas-fired electronic units are equipped with a new stainless steel, high-efficiency exchanger, a pre-mix gas burner, forced draught and show an innovative design. They also are EC-approved.

This is a capital year for the Company: the wall-mounted gas-fired modulation heaters series Plus are launched.

They are EC-approved and feature high efficiency stainless steel exchangers, pre-mix gas burner and forced draught with low NOx emissions.

The research and development effort connected with this product have enabled the subsequent designing of the Kondensa heaters.

The leading role of the Company is confirmed with the launch of AQUASPLIT, an outdoor boiler with matching indoor blower. Another goal is achieved in the research and development effort to offer our clients leading-edge products.

During this intense period APEN GROUP confirms its technical knowledge in the air handling industry launching the Kondensa heaters.

The new Series includes wall-mounted condensation warm air heaters, air handling central units, and Roof Top standalone units with built-in condensation exchanger.