Our wood stove has a 8" opening & we have a 6" flue.?

Question

We used an adaptor to connect the two together near the top of the stove. We are experiencing backdraft fairly often. We were told that extending the length of the chimney on the roof would not help. We were also told that changing the adaptor (8 to 6) from the top of the stove to closer to the ceiling would not help. Are there any fixes other than buying a new wood stove. This one really heats our house nicely. Thank you for any help.

Answer 1

Perhaps a sleeve around 6" flue as per your local heating code would help, perhaps there is a better solution. Search on line, or better yet, look in your nearest wood stoves outlet for the cards of the local, recommended qualified installers. Estimations and advice are usually free. Best holiday wishes.

Answer 2

There are several reasons you have "backdraft". The main cause is negitave pressure. This means the air pressure outside is greater than it is inside your home. Make sure you don't have a fan around the fireplace opening or an a/c return, fart fan or anything that pulls air from the room. When you pull air from the room it needs to be replaced somehow. Air like water will travel the path of least resistance. Another problem may be that you reduced the size of flue to 6". If your stove has an 8" flue outlet then you should use 8" pipe. There is also the 10/2 rule. The termination cap must be 2' higher than anything within a 10' circumfrence of the cap. Also, if most of your pipe is exposed or on an outer wall, you are more likely to have a draw problem. Pipe draws better when it is warm so the more pipe you have in the house envelope (close to the ridge line) the better. Hope this helps.

Answer 3

Whoever told you that about the length of the chimney on the roof is wrong, although you didn't say what the length was. You should put the pipe up about the highest portion of the roof or any obstacles. Any obstacles are going to be creating conditions that will cause a back draft.
Also, whenever anyone open a door in the house, if you have a habit of having a window open for any reason, my wife does this in the bedroom to air it out in the daytime whatever the weather, therefore creating a negative air pressure and the smoke comes in.

Answer 4

Are there any elbows or offsets in your chimney? Is it the insulated type?The performance of your stove is limited to your chimneys ability to produce draft. I would suggest that you either change the chimney to an eight inch or do some research into increasing the effectiveness of your existing chimney. I run an airtight stove for heat, and while I was learning to run this stove I went on a few websites. It actually helped quite alot. There is a little technique involved. Search wood heat, backwoods living, etc.

Answer 5

I build chimneys the stack has to be 2 foot higher than anything within 360 degrees with in 10 feet. if that is already done you might be chocking the smoke with the down sizing. You might need to open the size back to 8 inch.

Answer 6

reduce to six inch at the wood stove ..also check to see if u have any other openings in the chimney or liner.if u find any holes .u might be better off lining the chimney

Answer 7

Locate a store/shop that specializes in wood stoves.They have trained technicians that can help. Stay away form the Big Box stores like Home Depot and Lowes as their clerks are not thoroughly trained in proper installatons etc.

Answer 8

maybe not backdraft. flue too small to handle expanding gasses. could crack open a window to get little better draw on flue

Answer 9

Higher chimney will probably fix your problem if you do not have any trees or obstacles close to your roof

Answer 10

Do you know what a flue vent is? It's a device to stop backdraft. Install one in your flue pipe, and your troubles will be over!