How to heat air over 500 degrees Celsius with electricity?

Question

Do it yourself

Interested in the equipment and materials that you can buy on the market and assemble the unit from it. It is necessary to heat
the air in a closed volume to the maximum possible temperature - at least more than 500 . Need maximum efficiency and long service life and high reliability

Answer 1

Air cannot be heated to 1000 degrees without its components entering into a reaction.

Answer 2

there are a lot of building hair dryers on sale that give out 500 degrees, study