Why choose a combination wood/gas oven?

The combi-oven allows you to pre-heat the oven with gas, and then cook with wood: you do not need to light it with wood, but simply turn on the gas burner to bring it to a temperature of around 300°C. Afterwards, the gas system is switched off and traditional wood-fired cooking is carried out. 
Should there be a problem with the gas supply, the oven can safely continue to run on wood, so as to avoid having to interrupt its work for reasons beyond the control of the restaurateur. To function in this way, however, the oven must be connected to a dedicated, natural draught chimney. Under no circumstances may wood be used in the presence of an under hood installation.