Harman Owners...What componets did you use for your OAK

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Lineman30

Feeling the Heat
Jul 9, 2010
333
Northeastern Oklahoma
I'm looking for suggestions on OAK component's. I had an 2 inch homemade OAK that went through my thimble (previous stove) and I've realized that my stove needs more air to run properly. I'm wanting some ideas before I purchase the material to do it. I've been thinking about using 3 inch ID but does anyone have any suggestions? I'm needing something really rigid and flexible.
 
My P68 works great with the Harman through-wall/OAK combo thimble thing.

It includes a 2" fresh air intake about 20" long. No air problems whatsoever.

Are you sure something hasn;t moved in to your OAK over the summer?
 
AVIVIII said:
My P68 works great with the Harman through-wall/OAK combo thimble thing.

It includes a 2" fresh air intake about 20" long. No air problems whatsoever.

Are you sure something hasn;t moved in to your OAK over the summer?

Well, actually the run that went through the thimble is 1 7/8 (what quads call for). I had issues on a previous post bout incomplete combustion (Error 6) and when i did some trouble shooting i found taking off the OAK made it work properly. Since then its worked properly and it needs more air to work as it should.
 
I think the flex pipe that I got is 2-3/16" or something like that, but it shouldn't really make any difference.

What did the intake on the outside of the house look like? And, just to reiterate, make sure there is nothing (ie- Mouse nest) jammed up in your pipe.
 
AVIVIII said:
I think the flex pipe that I got is 2-3/16" or something like that, but it shouldn't really make any difference.

What did the intake on the outside of the house look like? And, just to reiterate, make sure there is nothing (ie- Mouse nest) jammed up in your pipe.

Its been pulled out. It was a copper tubing with a screen on the inlet.
 
Lineman30 said:
I'm looking for suggestions on OAK component's. I had an 2 inch homemade OAK that went through my thimble (previous stove) and I've realized that my stove needs more air to run properly. I'm wanting some ideas before I purchase the material to do it. I've been thinking about using 3 inch ID but does anyone have any suggestions? I'm needing something really rigid and flexible.

Selkirk DT concentric type
 
My Accentra was installed with the Harman combination thimble. Not sure of the size of the flex intake pipe, but it looks about 2". Stove runs fine.

*****UPDATE*****: I looked at the manual and discovered that the Harman combination thimble seems to use a 2 3/8" flex pipe for the outside air intake.
 
I took 3" from Lowes. I have a 3 to 4" at the vent outside as that is a std. vent. I then crimped the 3" to the 2" at the PF 100.

Also, most OAK's are under the furnace vent, mine is on another side of the house. It's under my deck so I don't get any reverse drafting issues that they warn about.
 
2-3/8 flex , 12' run, no issues.

Insulated it for condesation control during cold months. Don't need to have mold in the wall.
 
Selkirk DT...be aware, the Selkirk pipe/appliance adapter probably won't fit your Accentra. You will most likly have to use a 6" piece of pipe section with RTV. But one wall penetration, much cleaner install IMHO.
 
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.
 
PJPellet said:
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.

considering that option. How much is the wall thimble? Called the local dealer and they said that never heard of it. so there you go great harman custermor service....
 
PJPellet said:
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.

considering that option. How much is the wall thimble? Called the local dealer and they said that never heard of it. so there you go great harman customer service....
 
Lineman30 said:
PJPellet said:
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.

considering that option. How much is the wall thimble? Called the local dealer and they said that never heard of it. so there you go great harman customer service....

159.00 from my dealer. Your dealer needs to look at a Harman owner's manual because the wall thimble is IN the manual. It's not Harman's fault that some dealers are clueless. Glad I have a good dealer.
 
PJPellet said:
Lineman30 said:
PJPellet said:
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.

considering that option. How much is the wall thimble? Called the local dealer and they said that never heard of it. so there you go great harman customer service....

159.00 from my dealer. Your dealer needs to look at a Harman owner's manual because the wall thimble is IN the manual. It's not Harman's fault that some dealers are clueless. Glad I have a good dealer.

On a sort of unrelated topic I have found a dealer who has been around for many years that didn't have any idea that as of Feb. 2011 there are new rules for hearth protection (ember & thermal protection). The hearth board manufacturer never even told the dealer about it. Although I think the dealer should have noticed a new sticker on the hearth board saying that the R value is 0....
 
PJPellet said:
Harman wall thimble with their flex pipe. Works well, and it's designed by the same people that designed your stove.

Same with mine and good advice. Lots of less expensive ideas that may work well. But for my money I'd rather spend a little extra to install what is designed for it.
Is there safety issues the consumer is not aware of???? Probably. Most manufacturers do not participate in the forums so who knows.
 
Lineman30 said:
I'm looking for suggestions on OAK component's. I had an 2 inch homemade OAK that went through my thimble (previous stove) and I've realized that my stove needs more air to run properly. I'm wanting some ideas before I purchase the material to do it. I've been thinking about using 3 inch ID but does anyone have any suggestions? I'm needing something really rigid and flexible.

For my P43, I used 2 3/8 flex with a 12 foot run and have no issues. Maybe I am confused but what model do you have?

Depending on application, the thimble is a viable solution, but every installation is different.
 
padfitz said:
Lineman30 said:
I'm looking for suggestions on OAK component's. I had an 2 inch homemade OAK that went through my thimble (previous stove) and I've realized that my stove needs more air to run properly. I'm wanting some ideas before I purchase the material to do it. I've been thinking about using 3 inch ID but does anyone have any suggestions? I'm needing something really rigid and flexible.

For my P43, I used 2 3/8 flex with a 12 foot run and have no issues. Maybe I am confused but what model do you have?

Depending on application, the thimble is a viable solution, but every installation is different.

I have the Accentra stove. My previous stove was a CB 1200 that required a 1 7/8 OAK. What i did was cut a hole in the lower corner of the thimble and made a copper tube and pushed it though the Thimble. I think my stove is starving for air because when the OAK is hooked up the hopper smokes, glass rattles, and the flame flickers violently. I'm just trying to come up with some ideas because i really dont have a dealer and i would like just to get the thimble/hose and be done with it.
 
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Lineman30 said:
padfitz said:
Lineman30 said:
I'm looking for suggestions on OAK component's. I had an 2 inch homemade OAK that went through my thimble (previous stove) and I've realized that my stove needs more air to run properly. I'm wanting some ideas before I purchase the material to do it. I've been thinking about using 3 inch ID but does anyone have any suggestions? I'm needing something really rigid and flexible.

For my P43, I used 2 3/8 flex with a 12 foot run and have no issues. Maybe I am confused but what model do you have?

Depending on application, the thimble is a viable solution, but every installation is different.

I have the Accentra stove. My previous stove was a CB 1200 that required a 1 7/8 OAK. What i did was cut a hole in the lower corner of the thimble and made a copper tube and pushed it though the Thimble. I think my stove is starving for air because when the OAK is hooked up the hopper smokes, glass rattles, and the flame flickers violently. I'm just trying to come up with some ideas because i really dont have a dealer and i would like just to get the thimble/hose and be done with it.

i'm also considering of adding a OAK too but i'm getting nervous of putting a hole in the wall and have a air starving issue like your experiencing.
 
tonyd said:
Mine did the same thing. smoke in hopper, flickering flame, installed the feeder air tube and now the stove rocks.

Is there a part number or did you modify as one of the threads I've read bout gummy stove??
 
I did have the kit ,A length of silicon tubing and 2 connectors. I feel a 1/4 in inner dia tube would do the trick. Two holes were drilled 25/ 64s. One next to the intake flapper and one next to the auger. as in the pic. Insert the tube in the holes and seal with some high temp sealant. The feeder needs the air and the tube does the trick. Stove cranks out the heat now and the only other thing that was changed were the pellets. Power pellets and I don:t think they made the difference. HTHs
 

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I did have the kit ,A length of silicon tubing and 2 connectors. I feel a 1/4 in inner dia tube would do the trick. Two holes were drilled 25/ 64s. One next to the intake flapper and one next to the auger. as in the pic. Insert the tube in the holes and seal with some high temp sealant. The feeder needs the air and the tube does the trick. Stove cranks out the heat now and the only other thing that was changed were the pellets. Power pellets and I don:t think they made the difference. HTHs
was this a Harman problem and this small hose was a tech bulletin sent out . thanks
 
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