The kitchen is the one room in a standard dwelling with a fixed layout/furniture. The standard spray head height is placed at a lower height in this room for better targeting of the significant fire risks; white goods and the hob/cooker in a room assuming a standard worktops height of 90cm high.
1) Above a worktop
Provided that the worktop and cupboard heights are suitable, the need to access a kitchen worktop looks to ensure its freedom from unplanned obstructions. The head must be located at least 10cm from the bottom of the upper cupboard (so the spray pattern is not affected by the cupboard above), and as high as possible above a worktop up to 40cm (to help is clear any potential worktop objects).
2) Not above a worktop
For installation in the kitchen area, the spray head must be installed at a height of 1200 - 1450mm. Locate the head at the lowest possible height within that range.
The spray head must be installed at a height of 1400 - 1450mm from the finish floor level in non-kitchen area.