Reducing flue pipe 1"?

Reducing flue pipe 1"?

PostBy: Vampiro On: Tue May 06, 2014 10:57 am

Hi, there is a hand fired boiler I am interested in. It has a 9" flue pipe exiting the boiler. Would it be possible to reduce this and go into an 8" chimney pipe? The chimney will be 8" dia. and 32' high. The chimney would be able to handle the 240,000 (and then some) btu's that the boiler is rated for.

This will be a backup boiler, and will be used in case of power outages, or maintenance, etc....or when I feel like shovelling coal lol.

Thanks all :D
Vampiro
 
Stoker Coal Boiler: Axeman Anderson S260
Hand Fed Coal Boiler: #45 BAD HWH
Hand Fed Coal Stove: Harman Mk1
Coal Size/Type: Anthracite, Pea Coal
Other Heating: POS gas boiler

Re: Reducing flue pipe 1"?

PostBy: Richard S. On: Tue May 06, 2014 11:29 am

I'm not going to say yes or no but you reduce on the boiler end. ;)
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Reducing flue pipe 1"?

PostBy: northernmainecoal On: Tue May 06, 2014 11:33 am

My flue pipe reduces 1" at the chimney from 8" to 7". I haven't had any issues with draft, I do have a manometer so I can keep an eye on it. but so far no issues at all. During the cold winter months I was at .05 all the time, warmer days like today it's -.03
northernmainecoal
 
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Hitzer 30-95
Coal Size/Type: Rice/Nut

Visit Hitzer Stoves

Re: Reducing flue pipe 1"?

PostBy: franco b On: Tue May 06, 2014 11:37 am

That's a good size boiler but i would not hesitate to try it. If the chimney drafts well, then no problem. Try it under low draft conditions with a manometer to check draft readings.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Reducing flue pipe 1"?

PostBy: Vampiro On: Wed May 07, 2014 5:36 pm

Thanks for the replies all. Appreciate the info.
Vampiro
 
Stoker Coal Boiler: Axeman Anderson S260
Hand Fed Coal Boiler: #45 BAD HWH
Hand Fed Coal Stove: Harman Mk1
Coal Size/Type: Anthracite, Pea Coal
Other Heating: POS gas boiler

Re: Reducing flue pipe 1"?

PostBy: Dave 1234 On: Wed May 07, 2014 7:41 pm

FYI, My local supply house had a 9'' TO 8'' reducer on hand for 12 bucks.
The 9'' breach on my boiler is oval so I put a foot of 9'' stove pipe on the boiler then the reducer. next the elbow . works good here.

Good luck on yours.

Dave 8-)
Dave 1234
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Visit Hitzer Stoves