OAK on Harman XXV

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nmerkley

nmerkley

Member
Sep 17, 2010
28
Southern Indiana
www.sihlumb.com
Quick question, I am in the middle of construction of my home and just purachased a Harman XXV. I need to bore a couple holes through concrete for exhaust and Fresh Air intake. I was looking at the 3'' Simpson PelletVent Pro Fresh Air Intake Kit - 3PVP-AIK but it reads 2" diameter pipe. Will this restrict my air flow or cause a loud sunction noise. Any with Experience I mush appreciate it.

Thanks
Nick

PS I still have about 3000 ton sitting around if anyone is passing through Southern Indiana
 
why not get the Harman DV pellet pass thru and keep it all in one 6"x6" hole? Selkirk also makes a nice 6 5/8" dual use gas/pellet direct vent pipe that only requires one hole in your wall.
 
Oh I agree that would be easier but with the way my house is set up into a hillside I will exhausting out one wall and taking air in on a different wall (corner setup). Thanks though.
 
i think 2" will be too small, jump up to 3" and hold it in place with a pipe clamp or something similar.
 
Delta-T said:
i think 2" will be too small, jump up to 3" and hold it in place with a pipe clamp or something similar.
Click to expand...
I agree 2" is going to be too small, you want to feed that stove will all the fresh air it can handle. The 3" will provide much better airflow, and less noise.
 
That should work perfectly with the harman 2 5/8" outside diamater air intake on the stove.
 
My St. Croix has a 2" fresh air intake...even if you install a larger hose it still is effectively a 2" intake...
 
yes you are correct that you do effectively only have 2" but the longer the two inch run the more you reduce your air flow, hence the reason to step up in size. Does anyone have pics of their XXV OAK installed. I did a search but came up empty. Did you use just 3 inch flex vent and a exhaust hood outside?

Thanks
Nick
 
I don't know if this will help you out, but..
I went with two holes. One for exhaust and one for fresh air. I'm told the dual one hole kits can cause condensation on the fresh air intake. My fresh air kit I used was a Home Depot 3 inch dryer kit that comes with the plastic vent w/grill and a peice of 3 inch tin about 1 foot long. $8.00. I bought a peice of metal flex 3 inch dryer pipe from Home depot and a 3 foot section of Harmon bastered sized intake flex pipe from the dealer. The whole gig cost me about $25.00. I dont have any pics of the intake setup, but the link will show the exhaust.

https://www.hearth.com/econtent/index.php/forums/viewthread/23995/
 
flashbang said:
I don't know if this will help you out, but..
I went with two holes. One for exhaust and one for fresh air. I'm told the dual one hole kits can cause condensation on the fresh air intake. My fresh air kit I used was a Home Depot 3 inch dryer kit that comes with the plastic vent w/grill and a peice of 3 inch tin about 1 foot long. $8.00. I bought a peice of metal flex 3 inch dryer pipe from Home depot and a 3 foot section of Harmon bastered sized intake flex pipe from the dealer. The whole gig cost me about $25.00. I dont have any pics of the intake setup, but the link will show the exhaust.

https://www.hearth.com/econtent/index.php/forums/viewthread/23995/
Click to expand...

being that any intake kit is basically cold, any intake kit can have condensation issues.......Ive seen some insulated with pipewrap insulation, that seems to work. I would suggest avoiding any material on an intake situation that might rust.
 
2" will be fine. The 2-3/8 ID of the Harman OAK tubing will fit with a hose clamp to secure it.
I doubt you'll get any "Sucking" sound...
 
Hello

I have an Avalon Astoria in the middle of the basement connected to the center chimney. The flue is short but I needed a 15 foot 2" aluminum flex hose for the fresh air. I also insulated the 2" flex hose with Home Depot Fiberglass Pipe Insulation and it works great! I usually run the stove on low and the air adjuster on 1 -2 out of 5. Even on higher heat settings I really do not need that much air. So I would say 2" works fine in my situation!


See pic of OAK hose covered with white fiberglass pipe insulation.
 

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