Flue question

[cbass]

I was at a home today with a 125,000 btu oil boiler in the basement and a fairly large coal stove in the above kitchen, both sharing the same clay lined flue. I know that you cannot share a wood burning device and a oil burning device on the same flue, but can oil and coal share a flue assuming that the flue is sized correctly? Do problems arise if both are being used at the same time? Thanks in advance.

[Mark P]

People still cook with coal? I had no idea.

[cbass]

They heat with it apparently... so... can you share the flue?

[Steven Hockstein]

They are on different floors and sharing a flue? I would call it out just for that.

[cbass]

yea, that is what i thought... the home owners explanation is that they only use one or the other...???

[Jim Katen]

There's also this from the IRC:

M1801.12 Multiple solid fuel prohibited. A solid-fuel-burning appliance or fireplace shall not connect to a chimney passageway venting another appliance.

[cbass]

Thanks Jim.

[Hearthman]

coal is a *solid fluel* so not allowed to be common vented with other fuels except for listed dual fuel appliances. For ex., if you have a boiler that is listed to fire coal or gas, that is allowed but not with another appliance.

HTH,