Which radiator is the right one?

Kermi has been producing radiators in Germany since 1967 and in 2005, revolutionised the market with its patented x2-technology. Until today, well over 75 million steel panel radiators have been installed. In the meantime, with the “Kermi x-optimised system”, we are the system provider for sustainable feelgood warmth. For us, warmth to feel good means: heat pump, heat storage, radiators, underfloor heating, residential ventilation, and control.

One component of the Kermi systems x-optimised is an extensive range of radiators. What radiators are there and which is the right one? Our guide should help you find the right radiator. Because Kermi is the go-to manufacturer, when it comes to radiators.

Steel panel radiators

Steel panel radiators are without doubt the most well known and top-selling “standard radiators”. They are available in many heights and lengths. The depth is called the type, and the number indicates the number of heating plates and convector plates. For a radiator type 22, this means: 2 water-conducting heating plates (first number) and 2 convector plates (second number) for room heating. In a conventional panel radiator, all panels are heated simultaneously Kermi therm-x2 steel panel radiators are based on the patented x2-principle of serial flow. The flow initially only flows through the front panel, because this heat output is sufficient in control mode. The downstream plate works as a radiation shield and only contributes towards additional room heating with high convection output as the increasing need for output increases. This results in up to 11 % more energy savings, up to 25 % shorter heating period of the radiator, and up to 100 % more comfortable radiant heat.

  • With energy-saving x2-technology
  • With three different fronts: Profil, Plan, or Line
  • Top cover and side panel standard
  • Wide range of sizes and colours
  • For all heating systems: oil, gas, or remote heating, solar energy, or condensing technology
  • Replacement radiator for renovation without laborious breaking and demolition work
  • Hygienic radiators for stringent hygienic requirements, e.g. in hospitals, medical practices, or for allergy sufferers

Steel panel radiators


Heat pump radiators

A heat pump radiator is the ideal radiator for the lowest flow temperatures. The low-temperature radiator heats up quickly and distributes the heat effectively in the room by combining x2-technology with axial fans. It makes optimal use of the low flow temperature of the heat pump, heats up efficiently, and rapidly dissipates the heat: When renovating old buildings, the radiator can be connected to existing pipes (underfloor heating is therefore not mandatory). In a new-build it can be used in rooms which are only to be heated up quickly at certain times, e.g. utility room or home office (underfloor heating would react too slowly here).

  • Significant reduction of the system temperature possible, allowing highly efficient operation with heat pumps and condensing boilers
  • Operated like a conventional radiator, the fans switch on and off automatically as required
  • Sound-optimised axial fans and spring-loaded bearings reduce noise to a minimum
  • Combination of x-flair with all therm-x2 steel panel radiators without looking any different
  • Maximum radiated heat output with integrated x2-technology

x-flair heat pump radiator

Kermi heat pump radiator x-flair

Design radiators

Rooms can be be individually designed with style when using modern design radiators. Simple and timeless or extravagant – an interior design element for the kitchen, bathroom, living area, or hallway. They are available in many shapes and colours, sizes, and heat outputs. The only thing to consider are the requirements for the new radiator: Should it be able to cover the complete heating demand of a room or provide warm towels as a bathroom radiator? Is it to be in addition to underfloor heating? Many design radiators are also suitable for simple, uncomplicated replacement during a renovation project.

  • Highest quality standards in construction, workmanship and surface finish
  • Wide range of sizes and colours
  • Many accessories: Brackets, hooks, and shelves in various shapes and surfaces
  • Many models also available with additional electrical or all-electric operation
  • Replacement radiators for simple, uncomplicated renovation thanks to the standardised hub distance

design and bathroom radiator


Infra-red radiator

An infrared radiator is an all-electric radiator. It provides a high proportion of efficient, cosy, radiant heat. This heat feels like warm sunshine, quickly and directly affecting the human body, as well as any other surfaces it irradiates. The high proportion of radiant heat minimises air movement and dust dispersion. This makes infrared radiators particularly attractive to allergy sufferers.

  • Short heating period and even heat distribution
  • Beneficial for allergy sufferers thanks to minimal air and dust dispersion
  • All-electric operation – completely independent from the central heating.
  • Flexible uses – can be installed almost anywhere

Infrared radiator Elveo

Kermi infrared radiator Elveo

Electric radiator

An electric radiator is completely independent of the central heating. The radiator is delivered complete with electronically controlled heating rod, heat transfer fluid, and controller. It can be used almost anywhere, because it is connected to the mains either via a socket or flush-mounted. A cost and time saving solution particularly in existing buildings.

  • All-electric operation – completely independent of the central heating.
  • Flexible application options – can be mounted almost anywhere

Design radiator for all-electric operation

Steel panel radiator x-therm +e


Kermi all-electric radiator

Radiator with additional electric operation

A radiator with additional electric operation can do both: It is connected to the central heating and also to the mains via an electric set. This is especially practical in seasonal transitional periods, because this means it can also be operated without heating.

  • Practical in seasonal transitional periods

Radiators for additional electric operation

Kermi Basic plus – radiator with additional electric operation

Replacement radiators

There are many good reasons for replacing old radiators. New radiators are more efficient and save on heating costs. They enhance a property visually and energetically in the case of renovation or energy renovation. Replacement steel panel radiators and design radiators are available in a range of different heights, lengths, and depths. With suitable hub distances of 500 and 900 mm, old DIN radiators can be replaced quickly, easily, and cleanly – without any laborious breaking or demolition work.

  • Hub distance 500 mm or 900 mm
  • Fast radiator replacement thanks to hub distances that exactly match those of the old DIN radiators
  • Problem-free, clean, efficient.
  • Just a few installation steps without any special accessories

therm-x2 Profil replacement radiators

therm-x2 Plan replacement radiators

therm-x2 Line replacement radiators




Austauschheizkörper - gleiche Anschlüsse neuer Heizkörper

Hygiene radiators

therm-x2 hygiene radiators are particularly suitable for stringent hygiene requirements. Hygiene radiators do not have any side or top covers, or any convection plates. This makes them quick and easy to clean. This ensures virtually dust-free thermal comfort, highly suitable for people with allergies.

  • For rooms with especially demanding hygiene requirements
  • Without convectors
  • Easy cleaning possible
  • Wide range of sizes and colours
  • Perfectly suited for new-builds and refurbishment

therm-x2 Profil hygiene

therm-x2 Plan hygiene

therm-x2 Line hygiene

Kermi hygiene radiator


Convectors are small and compact, but will impress you by quickly heating up the room using convective heat. They are particularly suitable for installation in front of room-height window areas, because with their high heat output, they form an invisible heat protection shield and prevent the stream of cold air spreading in the room. Convectors can be adapted for almost any building requirement. Whether curved, following the wall radius, or a cross corner solution, coupled, with one or more angles. And when attached to the bench convector, they even become a bench or window seat.

  • Compact and powerful
  • Short heating period
  • Even radiant heat
  • Special solutions for individual adaptation to the architecture


Kermi convectors

Heating panels

Heating panels are available in vertical and horizontal designs. Its balanced proportion of convection and radiant heat ensures optimal comfort. Vertical, slimline designs with closed side covers as standard or horizontal designs, optionally with or without covers, are an ideal fit in spacious, elegant interior design, e.g. in foyers, stairwells, entrance halls, or hallways. Special solutions also allow customised heating panels to suit every room design.

  • Powerful heat output
  • Short heating periods and precise control
  • In horizontal design, with or without cover
  • In vertical design, with standard side cover
  • Customised special solutions for virtually every installation situation

heating panels

Heizwand vertikal - Farbe Aluminium January