Welcome to the forum! There's information that will help you with your tri-burner operation. Just use the search feature or others will be contributing soon.
Do you have CO (carbon monoxide) detectors installed?
Do you have a manometer to measure you draft?
Is it a chimney instalation?
Combustion exhaust gas should not be inside the house. Please post some pictures of your setup, bot inside shots and chimney/PV shots. It will help a lot.
Has your tri-burner been retro-fitted with a continious combustion fan? There are thread on this forum that describe that mod.