Radiators are built up from one or more panels with convection panels between them (wave-shaped metal plates to create the largest possible surface area that transfers a large amount of heat into the air).

The SpeedComforts can be used on type 21 radiators without accessories. 
For a type 33 radiator, place the SpeedComforts in the widest opening. There are two convection panels in this area, which means this is the largest heat-emitting surface.

The distance between radiator panels is not standard. The SpeedComfort is 70 mm wide. This width is important because the SpeedComforts must fit between the two radiator panels. The magnets slide in and out on one side.
The SpeedComfort has been developed to be out of sight, at the bottom of the radiator. When put in the top of the radiator, the effect is identical. Radiators often have a grid on the top, under which the SpeedComforts can be hidden from view. Keep in mind, however, that the higher temperature at the top will affect the lifespan of the fans. 

Using the supplied 30 cm connection cable, you can connect multiple units in series to one power supply. Because the SpeedComforts use very little power, this can be as much as twenty in theory.

Old panel radiators sometimes have no convection fins between the panels and are not very suitable. 
Older cast-iron radiators are also not suitable for SpeedComforts.

Brackets with magnets are available for radiators with a gap between the panels that is smaller than 70 mm. These enable the SpeedComforts to be hung securely under the radiator.
Feet that are clicked under the SpeedComfort are available for convectors.

All types are supplied with an external thermostat switch. This can be placed on or near the hot water supply using magnets. If there is no magnetic material available (often the case with convectors), the supplied Velcro can be used.