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Buy dark radiators: Convincing technologies at a glance

September 8, 2025
Engineer checks technical plans in a factory hall
Saving energy costs and protecting the environment at the same time has been a top priority for many companies, at least since the exploding prices for energy. Dark radiant heaters, also known as infrared radiant heaters, offer you more flexibility than conventional heating systems. Why? It's quite simple - because systems with dark radiators do not heat the air per se, but instead transmit energy in the form of electromagnetic waves. When these waves hit a solid body, the energy is converted into heat. This makes it possible to heat with the usage profile of a hall and avoid layers of air above the usage area.

If you also want to save energy costs and protect the environment, KÜBLER dark radiant heaters are the right choice for your halls. Read all about our dark radiant heaters in this article and find out which system is ideal for your needs. Have fun reading!

Back to basics - everything you need to know about dark radiant heaters as a heating system for your halls

One of the biggest advantages of a Heating system with dark radiators is that you can only heat the usable area of your hall and avoid layers of air above it. In addition, the heat does not take a detour via the air, which is why the dark radiant heaters can be switched on and off just as quickly as the light. With this fast response time, the heaters adapt perfectly to the dynamics of everyday life, for example when doors are opened. Dark radiant heaters only heat where heat is needed and therefore save energy - saving up to 70 percent of energy costs compared to conventional heating systems. Employees also find the heat from the dark radiators particularly pleasant because it is similar to the natural heating principle of the sun. This allows them to work more productively. So much for the advantages. But which technology should you know about if you want to buy a dark radiant heater?

60 % Radiant efficiency - our PRIMA entry-level line

Do you have to do without an infrared heating system with dark radiators on a tight budget? Not at all! We prove this to you with our entry-level line PRIMA. Even if you are on a budget, you can buy a dark radiator and benefit from the numerous advantages of infrared technology. The entry-level range from KÜBLER is cost-effective yet powerful. It uses the best burner technology that we originally developed for the MAXIMA high-end series. The result is remarkable for a standard class heater. Dark radiant heaters from the PRIMA line bring a radiation efficiency of around 60 percent into the hall in the form of directly usable infrared heat.

This pays off directly for users of the technology. They save around ten percent on heating costs compared to conventional standard infrared appliances. The entry-level line is equally suitable for New hall buildings and renovation projects. The only important factor is the ceiling height. It should be at least four meters.

72 % Radiant efficiency - our high performance OPTIMA plus series dark spotlights

Going one step further OPTIMA plus. Since its introduction, the infrared heater series has been one of the most efficient and powerful dark radiators you can buy. KÜBLER has developed a burner technology especially for this series that ensures a homogeneous distribution of the gas-air mixture. It produces a long flame and scores with excellent energy transfer from flame to radiant tube. This means that the heat from these dark radiators is transferred evenly to the room environment - regardless of whether the hall height is four or 35 meters.

The outer casing of the high-end heater is also closed and fully insulated. The burner and radiant tube are geometrically optimized so that as little heat as possible escapes upwards. All in all, OPTIMA plus achieves a radiation efficiency of 72 percent. Depending on the hall project, operators can save up to 30 percent energy compared to conventional infrared technologies. The investment in dark radiant heaters from the OPTIMA plus series therefore pays for itself in two to five years.

80 % Radiant efficiency - our most powerful dark spotlight in the MAXIMA series

The series MAXIMA is the high-efficiency line from KÜBLER. In six years of development, the engineers have succeeded in setting benchmarks in the world of dark radiators with new technologies. For example, they have developed a new burner technology - including a system that preheats the combustion air. With minimized convection losses, it achieves an enormously high radiation efficiency of 80 percent (measured according to DIN EN 416-2). As a result, users of MAXIMA dark radiators save up to 45 percent on energy costs compared to standard infrared heaters. They also protect the environment thanks to low consumption values and the hearing of their employees. Because no infrared heater is quieter. Last but not least, the MAXIMA series impresses with its design. This has been confirmed not only by numerous customers from all over the world, but also by the international design competition "Design Plus powered at ISH". It has awarded MAXIMA a seal of quality.

100 % Energy flexibility in the energy transition

FUTURA, the forward-looking, energy-flexible multi-energy IR heater with new Fair.AIdH technology (Energy Flexible adaptive infrared AI driven Hall heating), the dark radiator is the energy transition. Open to renewable energies such as green electricity, blue or green hydrogen, biogas, (biogenic) liquid gas, and methane, this world first allows you to use the energy that is currently available at low cost. In addition, the dark radiator innovation integrates hall lighting into one device, thus also ensuring the economic transformation to the energy transition. If you have access to low-cost PV electricity, use the new MAXIMA line MAXIMA E-Hybrid. Or you can opt for the 100 percent CO2-free heating for your halls and use the innovative, powerful FUTURA E electric infrared heaters (with retrofit option to H2 or gas) or ELEXTRA.

FUTURA, FUTURA E, ELEXTRA, MAXIMA, or MAXIMA E-Hybrid and more—KÜBLER's selection of dark radiators will win anyone over.

KÜBLER's wide range of dark radiators offers you perhaps the broadest spectrum of heating solutions for virtually any hall geometry, any usage profile, any customer requirement, and any decarbonization strategy. Versatile and future-proof, highly functional, and superiorly economical in operation.

Intelligent control systems to match your dark radiators for greater efficiency

If you buy a dark spotlight and want it to develop its full energy-saving potential, you need another key component in addition to the devices: intelligent control systems. KÜBLER specializes in their development. In order to optimize the control of heating systems with dark radiators, we have developed a modular control system called CELESTRA This is a highly functional, intuitive control cockpit that allows users to adapt plant operation to changing requirements and run it at optimum efficiency levels. Up to 20% additional savings can be generated in this way alone—and even more, depending on the project.

One of the most important modules: EMMA (Energy Monitoring & Management Application). With the intelligent energy management system, users can analyze, archive, compare, and document temperature curves, heating output, and consumption data. This provides you with important information for the continuous optimization of the heating process and creates the basis for certifications and audits, for example, in accordance with DIN EN ISO 50001.

Save even more energy: With the H.Y.B.R.I.D. complete system, you can recover heat from exhaust gases from hall heating systems and production processes.

Of course, KÜBLER offers much more than just dark radiators as individual components. In order to achieve maximum energy efficiency, we have developed a complete system that combines infrared and hydraulic systems. System H.Y.B.R.I.D. The entire system integrates high-efficiency infrared heaters such as MAXIMA or FUTURA, digital controls such as CELESTRA and condensing boiler technology called O.P.U.S. X. A combination that makes it possible for the first time to use the residual heat from dark radiators to heat offices, for example. And more: the energy flows from production processes or from solar thermal energy (System HelioB.R.I.D.) can be combined and used in the hybrid system.

To do this, O.P.U.S. X extracts the energy from the exhaust gas and transfers it to a storage medium, usually water. The hot water can then be fed into the heating circuit return of a pumped hot water heating system via a buffer tank. In this way, you can recover up to 15 percent of the energy that was previously lost to the environment.

When it comes to energy efficiency, the intelligent combination of dark radiators, controls, and residual heat utilization is virtually unbeatable: energy savings of up to 70% have been demonstrated in reference projects to date. It is no coincidence that H.Y.B.R.I.D. was awarded the German Sustainability Prize as Germany's most sustainable product.

Conclusion: Buy dark radiators that pay off

If you want to buy dark radiant heaters, you can choose from numerous products on the market. To find the right one, you should first get an overview of the special features, requirements and use of your hall. Why not use our free configuratorso that we can make you an individual offer!

Everything you need to know about energy-saving hall heating systems in practice
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