Taking Control - A guide to buying or upgrading central heating controls(view report contents)

Danfoss Randall 103 £61

Impaired dexterity
Tappets were too stiff to move easily and were uncomfortable to grip. A high proportion of people could not move them at all.

Impaired vision

Danfoss Randall 4033 £99
Can be used to control hot water.

Impaired dexterity
Tappets were too stiff to move easily and uncomfortable to grip. A high proportion could not move them at all. It could be difficult to tell when the toggle switches were in the right position because the settings were close together.

Impaired vision
A version with braille type is available (see below).

Drayton SM2 £67
Can be used to control hot water.

Impaired dexterity
Tappets were too small and too stiff to move easily. The dial tended to move with the tappets which made changing the
settings difficult.

Impaired vision
Colours on transparent tappets did not stand out and were too small. Markings on the unit were too small.

Horstmann 425 Diadem £65
Can be used to control hot water.

Impaired dexterity
Tappets were difficult to move and the dial was hard to grip and turn.

Impaired vision
White on grey markings on the tappets were too small and unclear.

Drayton Switchmaster SM805 £94
Can be used to control hot water.

Impaired dexterity
The dial was too small for a few people and it moved when the tappet settings were changed. Push buttons were easier.

Impaired vision
Markings on tappets and unit were small and colours did not stand out.

Siemens RWB2E £55
Can be used to control hot water.

Impaired dexterity
The tappets were very light and easy to move but the dial tended to move with the tappets which made changing settings difficult.

Impaired vision
Markings on the tappets were too small and the colours did not stand out.