Let‘s realize the potential of air for a sustainable world

We are pioneers in air technology and air conditioning technology for 100 years

On this page you will experience an interesting journey through time and the history of LTG. Immerse yourself in the world of six generations with all their traditions, values, challenges, goals and find out the differences and similarities to our present time.

Silent Generation

1924 – 1945

Born after or during the war, this generation is resilient and disciplined. Stability, authority and hard work play a big role. Therefore it is not surprising that Dr.-Ing. Albert R. Klein, founding father of LTG, worked hard and disciplined at that time, founded the Cärrier Lufttechnische Gesellschaft and thus paved the way for today’s LTG Aktiengesellschaft. He consistently turned what was then Germany’s very first engineering office into a technical trendsetter, equipping many industrial processes and buildings with air conditioning for the first time: porcelain was dried for the first time, tobacco was humidified, office buildings were air-conditioned for the first time and theaters were intelligently ventilated – LTG was always involved.

LTG Milestones

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1919

Induction system: 1st patent induction systems from Dr. Albert Klein

October 11, 1924 LTG was founded: Cärrier Lufttechnische Gesellschaft m.b.H.
1927 First air conditioning systems in the tobacco industry (tobacco humidification saving money and improving quality)
1928

First air conditioning systems in the textile industry (improving cotton processing)

1929

First air conditioning systems in the paper industry (production of high-quality art paper)

1932 First air conditioning system for office buildings (pension institution in Prague)
1933

Volume flow controller for buildings: demand-dependent control

First packaging sheet dryer (Nivea can, beginning of a new division of drying technology in the packaging sector)

1937

Air conditioning for theaters with airflow from below (Friedrich Theater Dessau)

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Health

The importance of air-conditioned interiors was already recognized 100 years ago to improve poor hygiene. Nothing has changed in this regard since then. Newly built office complexes without indoor air concepts are unimaginable these days.
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Environment

Previously not a focus of attention, reducing emissions to preserve the climate only began to play a role a few decades later. Companies have more responsibility here than ever before.
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Cost

The automobile, tobacco, shoe and porcelain industries benefit from stable humidity and stable production temperatures for the first time. This improves quality and reduces waste. The principle of recycling raw materials via filter systems is now more important than ever under the heading of recycling.

Baby Boomer

1946-1964

Baby booming, ambitious and shaping today’s Germany – the post-war generation is the first to experience the benefits of technological progress, such as the rise of television and later the Internet. This time of optimism and innovation did not stop at LTG and its developments: On the one hand, spinning mills at that time benefited from LTG’s broken thread extraction systems, which collected and disposed of spinning waste or prepared it for further use. On the other hand, the first patent of the founding father of LTG, an induction ventilation system, is further optimized in line with the prevailing mood of innovation and proves itself in use in office buildings from the 1960s. The comfort air conditioning business area is also growing through orders for the air conditioning of film studios, cinemas, theaters and hospitals.

LTG Milestones

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1949

LTG’s own thread break extraction system with return to the hall (beginning of the development of complete systems for collecting spinning waste with disposal and further use)

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Health

In 1927, with the support of Dr.-Ing. Albert R. Klein, the company sports community is founded. As a result of drafts for military service, company sport came to an almost complete standstill from 1944 onwards. It wasn’t until 1948 that gaming operations continued. Football, gymnastics, fistball – it’s sporty at LTG!

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Environment

Sustainability as we understand it today was only defined in the 1980s. No earlier than the peace and anti-nuclear movement at the end of the 1960s did this point increasingly come into social focus.
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Cost

The first filter systems for the efficient collection and further use of industrial waste have continued to develop. They continue to bring crucial cost savings to the manufacturing industry.

Generation X

1965-1980

Independent, pragmatic and distrustful of established systems – inspired by the vision of world peace and humanity, this generation questions authority. In times of economic uncertainty and globalization, LTG is taking bold steps: with the construction of the test and development center in Zuffenhausen, it is laying the foundation for engineering services. With the construction of the factory in Weil der Stadt for series production, the company is making a conscious statement for Germany as a production location. This time of technological progress saw groundbreaking LTG innovations such as the first flap-controlled induction devices or the simulation of spatial flow for the Spacelab space laboratory.
LTG Milestones

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1970

Flap-controlled induction devices: control of the secondary power for heating and cooling at the same time

1972 Linear ceiling air diffuser LDB clean with controlled Coanda effect and reduced ceiling contamination
1973

Dryer with afterburning of the solvents and heat recovery (improved emission protection without higher energy consumption)

1975

Simulation of space flow for the Spacelab: Optimization of the life support system

First computer programs for calculating the energy consumption of air conditioning systems

Drum filter TFA and fiber compactor FKA system comparisons of different system types

1976

Regenerative heat exchanger: less pressure loss and aluminum with the same heat/moisture coefficient

1977 Centrifugal fan VRS
1980

Energy saving in comfort air conditioning systems: Architectural seminars with advertising for demand reduction

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Health

The physical fitness of employees is promoted by an in-house football team. The thermal well-being of people indoors is studied empirically for the first time and creates comfort parameters that still exist today.

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Environment

A social awareness of sustainability is emerging. Immission control establishes itself as part of industrial processes. For example, dryers are used that burn solvents and recycle heat.

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Cost

The first oil crisis in 1973 increases awareness of energy-saving air conditioning. Advances in computer technology make it possible to carry out the first dynamic calculations of energy consumption in 1974.

Millenials

1981-1994

The Internet, cell phones and social media shape the communication behavior and information gathering of this generation. It is driven by a heightened awareness of global problems, social justice and environmental protection. In keeping with the spirit of the times, LTG pursuis the topic of sustainability with vigor. Political requirements, such as thermal insulation regulations, make energy-saving construction and ventilation of buildings necessary. LTG is developing the first electronic assemblies for building automation, which are incorporated into the results of dynamic calculations. The groundbreaking engineering project to equip the Great Pyramid with an indoor air system also takes place during this time.

LTG Milestones

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1981 Low-draught ventilation control for large rooms
1984

Improvement of climate control through the first digital air conditioning system Digivent (flap-controlled induction devices for energy saving in comfort air conditioning systems)

Roof ventilation device with heat recovery for manufacturing facilities

1987

First energy management for air conditioning systems in Germany with financing through energy savings

High temperature tangential fans

1989

Mixed displacement ventilation for parapets with high comfort and high performance

1993

Flying mounted cross-flow fan VQE

Cooling compartments with unsteady room flow

Development of the LTG cooling compartment cool wave®: high thermal comfort, very quiet

1994

Volume flow controller with map control for low air speeds and with a large control range

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Health

Even large rooms are ventilated with low drafts for the first time using LTG technologies. Then as now, this reduces the risk of health problems and promotes comfort at work and in everyday life.
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Environment

The rise of the climate movement, with milestones such as the Montreal Protocol to protect the ozone layer, spurs LTG’s product innovations. Technical improvements for energy-efficient air conditioning are the order of the day.

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Cost

The production of the first high-temperature cross-flow fans also enables other industrial sectors to produce efficiently and thus cost-effectively. Today, versions with conveyor temperatures up to 800°C, for example for the glass industry, are not uncommon.

Generation Z

1995-2009

Intensive use of social media, streaming services, online gaming and digital platforms from an early age is characteristic of the first digital natives. Creative, innovative and technology-savvy, this generation is increasingly committed to multiculturalism and environmental issues in society. Driven by the technological possibilities of the time, LTG develops the first airstream simulator for the automotive industry, which is still being used successfully in an optimized version. The Kyoto Protocol with target values ​​for greenhouse gases and the Renewable Energy Act reinforce the importance of a green future. During this time of global reorganization, LTG is also restructured into a stock corporation.

LTG Milestones 

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1996 Vortex ventilation for theaters: stable room flow
1999


Swirl diffuser DLA 8: more economical due to larger air flows

Development of the first airstream simulator
Drum filter VersaDrum filter VDF
(Forerunner of the current CDF)

2001

Floor induction device HFB

Decentralized ventilation device FVD with direct induction and use of free cooling

2004

Decentralized ventilation device FVD: high performance, heating even without outside air operation

2005

Decentralized ventilation device FVM for the facade: increased cost-effectiveness and even more comfort

2006 Outdoor air intake for decentralized ventilation devices: improved air quality
2008 Decentralized ventilation device FVS for schools
2009 Largest centrifugal fan manufactured in Weil der Stadt: 4.5 m high | 2.5 m wide | 6.5 tons heavy
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Health

The development of decentralized ventilation systems for rooms with a large number of people reduces the risk of infection for everyone present. A number of innovations in this area make LTG a sought-after provider of intelligent ventilation systems.
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Environment

The Energy Saving Ordinance regulates the overall energy efficiency of buildings. It will later be replaced by the Building Energy Act. LTG’s products come into play here and are still based on political guidelines in the area of ​​the environment.
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Cost

Buildings that are sustainably constructed and renovated using the latest technological possibilities not only save ongoing energy costs, but also have more stable value. By integrating LTG ventilation units into facades, building planners can significantly improve space efficiency.

Generation Alpha

2010-2025

Surrounded by smartphones since birth, the world of this generation is digital. Non-traditional family structures and diverse identity characteristics will shape the perspectives and interests of today’s youth in the future. It remains to be seen what capabilities they will use to shape the economy and technology development of the coming decades. Companies of today and tomorrow will have to adapt to the requirements of these consumers, business partners or employees. LTG sees its social mission for the future in taking responsibility for people and the environment: with products that promote health and well-being while protecting the resources of our wonderful earth.

LTG Milestones

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2011

HFVsf induction device with SmartFlow system: air conditioning as required

2012 HFFsuite induction device specifically for hotel air conditioning
2013

Pulsating, Dec. Facade ventilation device
FVPpulse system PulseVentilation

LTG fans already achieve the ErP 2015 standard

2014

 

System development: Brake Cooling System, screening systems for the separation of materials

Wind tunnel: engineering, manufacturing, commissioning and maintenance of complete systems included

Cross-flow fans: small, high-temperature versions for the electronics industry (TERt 60/195/24V E3925 Volpato)

Airstream simulators: nozzle detection, SC03, Biturbo, > 300km/h, LAN connection, comfort drive, for motorcycle test benches

Filter technology: New series of edge strip shredders ZR, drum filters with sheet metal housings, filter technology for the recycling industry (Voigt, Varel)

2023

LTG corporate transformation “NextLevel” (Strategy 23 | Brand relaunch)

25 years of airstream simulator

2024 Anniversary 100 years of LTG
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Health

Hygiene and health have established themselves as important topics worldwide in recent years. The world is in turmoil in times of Corona virus. What will affect our health in the future? What medical breakthroughs will improve our lives in the future?

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Environment

The European Green Deal envisages that Europe will become the first climate-neutral continent by 2050. By 2030, at least 55% of greenhouse gas emissions should be saved compared to 1990. Will other continents follow suit in the future? Or will the green direction of the economy not be able to assert itself in an international comparison?
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Cost

Made in Germany is still a hallmark of good quality. Germany, a highly innovative business location, has to assert itself more than ever against cheap production from other regions of the world. Will the focus in the future move further towards highly specialized disciplines such as engineering services and away from the manufacturing industry?