A Type I grease hood is required wherever there is non residential stove-top cooking. Type II hoods are required over most equipment that will create heat, steam or odors but not grease. Examples include steamers, kettles, pasta cookers and dishwashing machines that are not the under counter type. In most cases, a hood will not be required for built-in electric convection ovens or microwaves. Hoods are not required for portable appliances of any kind, but if the Fire Inspector finds grease buildup when inspecting the business, the Fire Marshal's Office may require that a hood be installed.