It's a kiln and not using a doorway. It is made to rise to incredibly high temperatures - as many as 950°F. Examine to the standard kitchen oven which does not even prime 550 for self-cleansing and cannot be established to 550 for anything. Thanked 182 Instances in 69 Posts https://us.enrollbusiness.com/BusinessProfile/7439443/So-Cal-Fire-Pits-Anaheim-CA-92807