Freddy wrote:Another good reminder to have CO detectors. Are all coal boilers wet bottom? That is, water all around the flame? ..snip
All coal boilers will be a dry bottom since the ash is collected at the bottom and the base is open on one or both sides to remove the ash bin.
Lumberjack wrote:Boilers are just as capable of producing carbon monoxide and leaking it to the house as any furnace. Neither one has any real advantage over the other in terms of safety. However, on the slight chance I am wrong feel free to enlighten me....snip
As has already been explained the hot air that is distributed passes over a plenum that has the firebox on the other side (obviously a leak there will pass CO into the air being sent through the ducts). A boiler doesn't have any single wall non wet point of contact to air that is distributed throughout the house. Even if a leak is present on a boiler the water is contained in he system so no CO will move into the residence through this means.
It is true that CO leaking from an improper draft or other factor can enter the air space for stove, boiler and furnace alike with the same risk.