What is the difference between a Type 1 and Type 2 Vent Hood?

Type 1 hoods are to be used with appliances that produce grease and smoke. Such as fryers, griddles and ovens. According to the International Building Code, that includes pizza ovens. However, some cities allow the use of Type 2 hoods for pizza ovens.

Type 2 hoods are to be used with appliances that produce only heat and steam and no grease or smoke. Such as dishwashers and pasta cookers. Some cities allow the use of Type 2 hoods with pizza ovens.