Well, those new little roundy round home Pizza cookers don't need
a hood, buy they're only good for up to a 12" pizza.
Any commercial pizza oven that I know of, will require
a ventilation hood. Many areas will also require a fire
suppression system.
You're talking about a big investment.
No. The oven has a vent already. It is probably under one of the back burners.
A home system of baking pizza is best done using a "pizza stone" placed on one of the baking racks of the oven and preheated at a high temp.
The average pizza oven is about twice the size of a regular oven, but it depends. It can range from 18 to 32 inches. A wood-fired pizza oven will be much larger.
Under current Ansul design specifications, UL300 and NFPA 17A standards, there is no requirement if the pizza oven is fitted with a door. If the oven is open, even with no open flame, due to a build up of oils and greases from cheese and meats within the appliance, there is still the potential for these to ignite from the heat (as these natural oils could reach flashpoint) and therefore, would be considered as a high risk appliance and should be covered along with the hood and extract duct. This is the same for grills (Salamander Broilers).
pizza spatula
You make pizza crust in the oven.
Yes, you can do it whenever - I do it all the time!
It means there is a pizza in the oven cooking just for you!
Electrical
There are several examples of a well-rated pizza cooker. Some of these examples include the Presto Pizzazz Pizza Oven and the Nemco Countertop Pizza Oven.
A traditional SpaceMaker toaster oven can fit a small pizza.
Pizza ovens do cook pizza more efficiently than a traditional oven because pizza ovens are specially designed to make pizza better. The pizza ovens won't burn your pizza or overcook like a traditional oven.