Without a doubt, get a certified contractor to do this for you. If your house burns to the ground or you kill half the family you'll be glad you did. Even if the burner is not the direct cause of any ill events, you'll not be covered by insurance.

Last week I installed a new 20amp circuit into my grow space. I paid a fortune but now I'm covered. If I burn my entire house down, there will be no dispute of a code violation as the cause. It was to code.