It's happened!!! And only two seasons in...

Re: It's happened!!! And only two seasons in...

PostBy: Lightning On: Sun Dec 16, 2012 4:53 pm

SO, how about running stove pipe up to the chimney flue liner and sealing it there with fiberglass insulation?
Or have you tried that already? Unless you have some serious stack effect going on in the house (air leakage thru the roof) I don't see why this wouldn't work...
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: It's happened!!! And only two seasons in...

PostBy: CapeCoaler On: Thu Dec 20, 2012 12:01 am

I go with Berlin taller is better...
I have a short exterior metalbestos chimney...
I was 3 feet over the peak...
Added 2 feet and now it drafts very well...
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove

Re: It's happened!!! And only two seasons in...

PostBy: I'm On Fire On: Thu Dec 20, 2012 11:12 am

CapeCoaler wrote:I go with Berlin taller is better...
I have a short exterior metalbestos chimney...
I was 3 feet over the peak...
Added 2 feet and now it drafts very well...


I added two (2) feet to the chimney this past summer. It didn't help.
I'm On Fire
 
Hand Fed Coal Stove: DS Machines DS-1600 Hot Air Circulator


Re: It's happened!!! And only two seasons in...

PostBy: KLook On: Thu Dec 20, 2012 11:46 am

I think it is the exterior chimney at fault. It stays to cool and the air is not rising and creating good draft. If it was only the length of the chimney, my metalbestos one would not work at all. Because its insulated, it maintains a temp. difference. Mine is only 6 inch and drafts super.
Is your unit such that you could burn some wood or paper or cardboard? Get some heat into the chimney and check the draft. I think the mass of the chimney is such that it is just sucking up the heat before it can establish a draft out the top.

Just my .02 worth

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

Re: It's happened!!! And only two seasons in...

PostBy: franco b On: Thu Dec 20, 2012 11:59 am

Lightning wrote:Right, He tried taller :D I think exhausting gases from a vehicle are a bit different than the natural draft of a chimney fellas, help me out here :lol:

Keeping more heat in the chimney has got to make a difference and a smaller outlet at the top should do that. You could try that with a piece of sheet metal with a 6 inch hole, or use a chimney pot that will also restrict the opening. Too much cold air can sink into that big opening.
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: It's happened!!! And only two seasons in...

PostBy: Rob R. On: Thu Dec 20, 2012 12:08 pm

My brother is heating his house with a Hitzer stove connect to an exterior masonry chimney (8" round flue)...it drafts fine even on 45 degree days. The chimney is 42 blocks high, a few feet over the peak. I'm sure it would draft better if the chimney was inside the house, but my point is that even an exterior chimney should provide acceptable performance if it is tall enough.

My EFM is connected to a huge brick chimney that goes up through our living room. I think the chimney is 32' high, just over the peak, and the first 12' is inside the house. It provides sufficient draft even in July.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: It's happened!!! And only two seasons in...

PostBy: KLook On: Thu Dec 20, 2012 12:24 pm

exterior masonry chimney (8" round flue).


That 8 inch round is far better then this rock heavy mass outside chimney. I am not sure from reading through the post if it is lined. If it is not or if it is with 12x12, there is a large amount of air space surrounded with very cold stone etc. I think he almost has to have a draft inducer to get good draft with the lack of a high temp exhaust. Wood fires were so inefficient they worked fine, other then the creosote. Where do you stop going up to get a draft with cool exhaust? How about make up air? Has this been covered in past posts?

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

Re: It's happened!!! And only two seasons in...

PostBy: Lightning On: Thu Dec 20, 2012 9:51 pm

franco b wrote:Keeping more heat in the chimney has got to make a difference and a smaller outlet at the top should do that. You could try that with a piece of sheet metal with a 6 inch hole, or use a chimney pot that will also restrict the opening. Too much cold air can sink into that big opening.

If anything, its worth a try... Just do it when your home to monitor the draft and give the chimney time to adapt to a smaller opening at the top. I know it seems to not make sense, but if cold air is sinking in because the opening is too big, it may help.. 8-)
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: It's happened!!! And only two seasons in...

PostBy: I'm On Fire On: Sat Dec 22, 2012 6:42 pm

I do run a draft inducer. The chimney is lined with 9x13 terracotta tile. The chimney is outside on the north end of the house. I have thought about framing the chimney out and insulating it then siding it. I'm not sure if it can be done though. I think the chimney is just too big. Inside siameter is 8x12. This is the first season I'm using the chimney itself as last season I had a 16' 316Ti liner in it.
I'm On Fire
 
Hand Fed Coal Stove: DS Machines DS-1600 Hot Air Circulator