Wood boiler/system

kevin

a heating system that the HO want to add a radiant zone onto as well as striaghten out a few "quirks"it has...One being it has a oil fired boiler(weil-Mclain 68 w/ a tankless) and a wood boiler sharing a chimney!This wood boiler has no storage tank and dumps into a rather small baseboard loop. They would like to keep it and I will try to help them. I am looking for as much info on controls ,tanks, piping schematics, etc. so I can give them a design that works. I have used the search part of the wall but would like more. I realize that a wood system is costly to set up and work to run but they are up to the task since they will have 3 adults there almost all the time. Any help would be appeciated. kpc

Dan Peel

Basic near boiler arrangements

Try the link below. Dan

http://www.benjaminheating.com/

To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"

Edward A. Carey

Oil Boiler & Wood Boiler

Are both boilers actually sharing the same flu within a chimney?. If so, that is not an appropriate installation.

You can not install an oil fired boiler in the same chimney flu as a solid fuel burning appliance. They can be in the same chimney, but the flu openings must be separate.


Regards,
Edward A. Carey

kevin

actually...

they share the same smokepipe tee. I realize that this is not right, as I said in my post. I don't think they can even be in the same flue, at different openings??Right? kpc

Boilerpro

Tekmar has a control for this application

that will automatically switch to back up only when water temp in storage will no longer supply the current system needs. From what I remember it was pretty slick...included outdoor reset and I think could be tied to an indoor sensor and/or zone control.

Boilerpro

Glen

This is not as crazy as you think -

in some jurisdictions - wood and oil are considered to be solid fuels - and share common breeching and flues. Where I see problems is the lack of barometric dampers to control draft when the wood side really kicks in. Here in the rockies of BC - we have many wood/oil combination scorched air furnaces - which generally work well until the HO stokes up the wood side and burns out much of the firebox. And there are still a number of really good combination appliances being built and installed today. Different strokes for different folks I guess.
Cheers - Glen

Edward A. Carey

Wood & Oil

Kevin,

The only way that you should put wood & oil appliances into the same chimney is if you are using equipment "Listed" by the manufacturer(s), for that applacation. Multi fuel boilers and furnaces are usually "Listed" for use in the same chimney. If they are not Listed, they too are not allowed.

Re: N.F.P.A. 31, Standards for the Installation of Oil Burning Equipment. 31-16 6.5.19 "Solid fuel burning appliances shall not be connected to a chimney flue serving another appliance burning other fuels, unless specifically listed for such connection".

Re: N.F.P.A. 211, Standards for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances.
211-27 6-8.2 "Unless listed for such condition, solid fuel-burning appliances shall not be connected to a chimney flue servicing another appliance .

That W-M 68 is listed to be installed in compliance with
N.F.P.A. 31 & 211. I do not have the installation manual in front of me, but I do not believe that it is listed to be installed as an exception to the standards.

If you do connect them into the same chimney, and set up a control system that allows for the operation, you have just become the new Research & Development division of
W-M. And I can assure you, that if there is a soot, smoke or CO problem in that home, W-M is gong to thank you very much for all your valuable technical input you provided for their company, and then tell you you are on your own with the problem.

You're the expert. Don't let your customer talk you into sticking your neck into a hangmans noose. He will be the first one to slap your horse in the **** if things go wrong. JMHO

Regards,
Edward A. Carey