Boiler exhaust hi-res stock photography and images - Alamy
What is this vent thing on our boiler? It has never closed even partially and it smells like oil burner exhaust when the furnace kicks on. : r/whatisthisthing
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Should you plug the sensing hole in the oil furnace vent?
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
