Need Advice with Venting Pellet Stove

[NorthoftheQuabbin]

I have a Piazzetta Sabrina pellet stove that's currently vented as pictured. I initially had some issues with the stove that prompted the stove shop to twitch from a direct vent out set-up to the one shown, thinking that it would create a better updraft. However, changing the parameters on the stove and using only specific types of pellets is ultimately what helped the stove run better.

That being said, I'd like to go back to a direct vent out set-up, which in hindsight was much easier to maintain because ash didn't collect in the 90 degree T like it does now. Unfortunately, I can't recall just how far the original pipe extended out from the house and what angle cap was used. The manufacture suggests 18 inches, but that seems a bit too close to the house. Any advice would be greatly appreciated.

 

[FixedGearFlyer]

The answer to most of your questions are in the Sabrina manual, which is here: https://us.piazzetta.com/sites/defa...duct Information_Installation_Maintenance.pdf

On page 20, it shows a direct, horizontal vent configuration with a minimum distance from the structure to the termination of 12". There are some other suggestions and requirements regarding outside air supply, clearances to the ground and other structure features, etc.

Regarding the proper termination cap, your vent manufacturer (which is probably Selkirk or Duravent) should have a horizontal termination cap that fits their venting system. Get one of those and you should be set!

 

[NorthoftheQuabbin]

The answer to most of your questions are in the Sabrina manual, which is here: https://us.piazzetta.com/sites/default/files/2019-09/SABRINA 2.0_Product Information_Installation_Maintenance.pdf

On page 20, it shows a direct, horizontal vent configuration with a minimum distance from the structure to the termination of 12". There are some other suggestions and requirements regarding outside air supply, clearances to the ground and other structure features, etc.

Regarding the proper termination cap, your vent manufacturer (which is probably Selkirk or Duravent) should have a horizontal termination cap that fits their venting system. Get one of those and you should be set!

Thanks for your response. I have the manual for the Sabrina which shows a minimum clearance of 18 inches from the house. I was simply looking to see if some members of forum had done a direct vent out as well, and might have some additional suggestions.

 

[FixedGearFlyer]

Thanks for your response. I have the manual for the Sabrina which shows a minimum clearance of 18 inches from the house. I was simply looking to see if some members of forum had done a direct vent out as well, and might have some additional suggestions.

Got it! I hope someone can chime in. We tried a direct horizontal vent, but ended up adding a 7 foot rise to help draft smoke with (common, around here) power outtages.

And, it's interesting that the online manual from Piazzetta shows 12 inches, but yours shows 18 inches. We just had an updated to the duct clearances from what was published in the manual and on the data plate for our wood furnace - doesn't give you a lot of confidence in technical publications, eh? :-D

 

[NorthoftheQuabbin]

Got it! I hope someone can chime in. We tried a direct horizontal vent, but ended up adding a 7 foot rise to help draft smoke with (common, around here) power outtages.

And, it's interesting that the online manual from Piazzetta shows 12 inches, but yours shows 18 inches. We just had an updated to the duct clearances from what was published in the manual and on the data plate for our wood furnace - doesn't give you a lot of confidence in technical publications, eh? :-D

Hmm, again my manual shows 18 inches. Anyway, do you find having the 90 degree T with a 7 foot stack a haven for collecting ash? Mine does, that's why I want to go back to having a simple direct vent out. Although, losing power and the possibility of smoke enter the house is a concern, but that rarely happens. Plus, I'm told having an OAK helps to minimize that from occurring.

 

[FixedGearFlyer]

Hmm, again my manual shows 18 inches. Anyway, do you find having the 90 degree T with a 7 foot stack a haven for collecting ash? Mine does, that's why I want to go back to having a simple direct vent out. Although, losing power and the possibility of smoke enter the house is a concern, but that rarely happens. Plus, I'm told having an OAK helps to minimize that from occurring.

I pop the cap on the bottom of the T and run a brush up the stack about once a month, so we haven't had any issues with ash build up. It might be an issue if we wanted to go longer.

 

[NorthoftheQuabbin]

I pop the cap on the bottom of the T and run a brush up the stack about once a month, so we haven't had any issues with ash build up. It might be an issue if we wanted to go longer.

I currently do the same thing. When I had the direct vent out, there was virtually no ash build up. Plus, I could snake the hose of my ash vacuum from the outside of the house to almost the back of the stove itself, which was cinch at keeping things clean.

I can do that now by removing the T, but it's more work and a lot messier. Again, if my stove was benefiting from having the current T and stack set-up I'd leave things alone, but I've seen no increase in performance by having it.

 

[Mt Bob]

There is always ash at a 90.Even more with yours,because the pipe is so tall.18" would be just fine for safety,and keeping the side of the house clean.Or you could put in a horizontal clean out,or even a double T with 2 clean out caps.Also,if you go straight out,consider a jet cap.

 

[SidecarFlip]

My vertical is 20 feet...lol It's 4" though. Never had an issue with fly ash, it drops to the clean out and I'll bang on the venting with a broom handle to makes sure it all drops plus a mid winter suck out with the leaf blower. I take mine down every spring and wash it inside with my pressure washer and some simple green and out it in the shop until fall, when I pout it back up again. Been doing that for 25+ years. Same venting and I burn corn and pellets combined.