I checked the link and they pointed me toward similar products. That made me think of the pizza oven for sale on the side of the road in Connecticut or New Hampshire, which made me think of the ungodly cost to ship something like this.
Which made me come up with an awesome marketing idea!
Make a real nice pizza oven, haul it down to your local garden center, maybe the lumber yard. Cut a deal with owners/managers. Customer can take that one, get a custom one done, maybe built on site.
I can smell the pizza now.
The designs I have looked at for a bee hive or tunnel type oven require mass.
For one is really heating up the brick and using the heat radiating from the brick to cook.
In some designs the fire can even die down and you can still bake bread due to the radiating heat.
So with something light enough to move around you generally see propane used to heat. This is more like a conventional oven.
What are you doing? You are supposed to be reading this tiny ad!