Those ovens and most of their products are assembled in Mexico and Frigidaire is actually owned by Electrolux.
No, microwave ovens don't have a standard length. They come in different sizes.
Kenner
There are many different kinds of materials the solar ovens are made of, but you can use a pizza box and tin foil, or glass and a card board box.etc.
There are many companies that offers custom made outdoor brick ovens. Homebuilders features custom made outdoor brick oven for an affordable price.
because aluminum is less expensive
Yes, GE Profile ovens are generally energy efficient. They made a wide variety of ranges and built-in ovens. A 27" built-in double oven runs around $2500.
Microwave Ovens
Dutch ovens in themselves may not smell bad, however depending on what is being cooked in the oven, the oven may emit a bad odor. Dutch ovens are made of solid cast iron, which is generally odorless.
Modern ovens can be set to an exact temperature for instance.
No longer made by any manufacturer.
A pizza oven varies in size greatly. Pizza ovens used to be made of brick and had chimneys. but now you can get metal pizza ovens. About 6 feet wide and 4 feet tall is what I would say is the average of the metal ovens.
Special bread ovens were huge affairs made of stone. Fires were stoked in the bases of these ovens and bread was baked on the stone slabs' tops.