Smeg XXSC111P - Manual (Page 16)

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Instructions for the User
8.2 To save energy
The pizza stone acts as a heat reservoir. This allows energy consumption
to be reduced, especially in cooking operations requiring medium-long
times. In these cases, simply switch the oven off 10-12 minutes before the
end of the cooking time. The heat gradually emitted by the refractory stone
will ensure that the cooking temperature is maintained.