Stack height

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Posts: 2
Joined: Tue Jan 29, 2019 7:20 pm
OWB brand: wood doctor
OWB Model: med

Stack height

Post by redleg105 » Thu Feb 28, 2019 9:49 pm

I have a 15 year old WOOD DOCTOR boiler and want to know if extending the height of the stack will affect the performance of the unit.
It's a conventional boiler. I also want to change the top to a better type spark arrestor. Will that be OK.
Attached is s photo of the one I have.
fullsizeoutput_b89.jpeg (22.72 KiB) Viewed 84 times

Posts: 310
Joined: Mon Jun 23, 2014 8:51 am
OWB brand: HeatMaster
OWB Model: G200
Location: South central Wisconsin

Re: Stack height

Post by RSI » Fri Mar 01, 2019 11:31 am

Adding stack height will increase the draft draw so you will want to make sure the door seal is good so it doesn't overheat. If you are only going a few feet it probably won't make that much difference.
Do you have sparks coming out the chimney? The cap in the picture is designed to keep wind from blowing down the chimney and overheating the stove. If you have a lot of wind where the stove is then you might end up with an intermittent overheating problem that you didn't have before.
Also, spark arrestors get plugged pretty easily so it will add to the maintenance.

Posts: 60
Joined: Sat Oct 29, 2016 9:18 pm
OWB brand: Central Boiler
OWB Model: 4436
Location: Southern Indiana

Re: Stack height

Post by Bull » Sat Mar 02, 2019 8:17 am

How long have you had your wood doctor?

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