Product review (2 stars): Oven has poor convection when using sheet pans.
About five years ago, we replaced our 30 year old Vulcan with a modern convection type.  The old one worked much better.

This may be good for line cooking, but for baking and production work, the ovens are terrible.  If you put two sheet pans into the oven at once, one will block the circulation in the oven and make it turn off the heat.  I've also found the range of temp swings wildly when trying to bake.  In the unit I've been using, one side cooks very differently than other.  I can bake ONE sheet pan per side when making cookies if I want even results and I have to set the oven to 450 to bake a recipe that calls for a temp of 375.

You'd be much better off buying a stack oven and a separate range.  I have not had the same issues with Vulcan stack ovens, which have a better fan system.