4 posts • Page 1 of 1
- Posts: 2599
- Joined: Tue. Jan. 08, 2008 9:51 pm
- Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
- Baseburners & Antiques: Magic Stewart 16, times 2!
- Coal Size/Type: Lots of buck
- Other Heating: Slant Fin electric boiler backup
- Location: Malta N.Y.
Yes it can be done. I used 6" for several years until I got the chimney built. It doesn't work good if you are going to use it on higher settings. I used mine on 4 and 5 teeth feed with the same air and didn't have issues until I jacked it up to 6 and above air. You can also get a little help with a draft inducer like several other members are successfully running.
- Verified Business Rep.
- Posts: 2063
- Joined: Mon. Nov. 19, 2007 9:33 pm
- Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
- Coal Size/Type: Anthracite/Chestnut
- Other Heating: Hearthstone wood stove
- Location: Lehigh Valley, PA
I know it's done. But if you run into a fire code inspector, he will only allow 7" (or larger). It pertains to the BTUH output of your unit, not how well it works in your personal setup.