Venting Questions and Should My New Stove Breathe Fresh Air?

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BurningMan

Member
Oct 27, 2008
19
New England
A-OK
After a long research period, I'm finally going to start burning those micro-logs that all of you have been enjoying.
My stove of choice is the Harman Accentra FS, which I should be getting in about a week.
After seeing the advice on this excellent forum, the venting will be ICC Excel.
And I really want to do my own installation, so I'm looking forward to that.

I've asked the question of three different dealers, whether or not to bring in outside air to the stove and all three advised against it. My house, built in the mid sixties, isn't air-tight by any means, but doesn't seem super-draughty either. And I used to burn wood in this same room and didn't have any draught issues back then, so I should be all set.
So are there plenty of you not using outdoor air and are you folks happy with that?

Also...
My stove will go kitty-corner and will have to be vented to the right side, where the outside wall is.
The possibilities are many here.
Should I...
A) Come out of the stove, go into a 45 elbow, then through the outside wall, into a clean-out Tee, then vertical a few feet.
B) Out of the stove (straight back), into a clean-out Tee, then up 24", into a 90 elbow, then outside, staying horizontal.
I wish I could draw this for ya and upload it here, but I'm not sure how to do that
.
So if you can follow me on this, what would you do?
One of my main concerns is having plenty of room in the back of the stove for maintenance.
Plus I'd like to hide as much of the venting as possible, so getting it outside as soon as it leaves the stove would be nice.
Then there is the issue of having most of the chimney sweeping being done outside, which I like.
But then some advise having most of the venting in the house, where it will give off some heat. Yikes!
Sorry, but I get more confused the longer I debate this :confused:.
Whew! !!!
 
Not much heat to be had from pellet venting. One small bit of info for your quest.
Reason for having vertical at all?
 
Outside air is a good idea. I don't have it but I really like the Sel-Kirk direc-temp vent that has the concentric air inlet. It's my belief that it adds some efficiency to the stove by preheating the incoming air and if you're vertically venting, the larger diameter pipe has better aesthetics.

My pipe gives off some heat but not enough to make it worthwhile.

The simplest way is just to dump it out the wall and stick a cap on it and be done with it.
 
Remember that the dual use pipe cools the exhaust gasses. If the temp in a longer run drops below 190/200 degree it can condensate and then start cresote.

Eric
 
Not much heat to be had from pellet venting. One small bit of info for your quest.
Reason for having vertical at all?

Because Harman recommends it. It will allow your stove to continue to draft naturally if the power goes out...
I say put the tee on the outside. You get a cleaner looking install inside & you get to brush-clean the vent from the outside, keeping the mess there.
 
Because Harman recommends it. It will allow your stove to continue to draft naturally if the power goes out...
I say put the tee on the outside. You get a cleaner looking install inside & you get to brush-clean the vent from the outside, keeping the mess there.

Dont Harmans have an flapper on the intake (like a sail switch, but no switch/pressure operated)?

My Fahrenheit has one on the intake also. In a power failure, the smoke is basically trapped inside the stove. Even the airwash on it has a flapper. Once the negative pressure is lost, both flappers close and seal the firebox. The smoke just sits in there. I have 5 ft of vert on it also.

Much better than leaking out. But I dont think vertical helps in the event of a power outage with my Fahrenheit. The way Harmans airwash is, I would guess that the firebox on a Harman would be the same way (becuse of intake flapper)?

I know most Manufacturers recommend a vert rise, but stoves with this intake design may not need a rise, as much as another brand? If air cant come in the firebox, it cant get out.

Maybe the flapper is different than on my stove. But I know a few people complained of the noise last season.

Thoughts...
 
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