Overall, one of the first considerations, stated Mike Markarian, vice president and director of education of the New England Fuel Institute (NEFI) and also director of education for the National Oilheat Research Alliance (NORA), is that “You need sufficient combustion air. From a safety standpoint, that is most important.”
He noted, “Since homes are much tighter now, this is much more critical today. A lot of companies are bringing in outside combustion air.”