Smeg PGFA95F Instruction Manual page 16

Instructions for the user
6.2 Practical advice for using the burners
For better use of the burners and lower gas consumption, use covered
containers that are proportional in size to the burner to prevent the flame
from licking the sides (see paragraph "6.3 Diameter of containers").
When water reaches the boiling point, lower the flame so that it doesn't
overflow.
To avoid burns or damage to the hob, all recipients or griddle plates
must be placed within the perimeter of the cooking hob.
When using fats or oils, be extremely careful that they don't overheat
and catch fire.
6.3 Diameter of containers
18
BURNERS
1 Auxiliary
2 Semi rapid
4 WOK
Ø min. and
max. (in cm)
12-14
16-20
20-26