Fresh air intake

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Dayman

New Member
Nov 2, 2021
9
Dunnville, Kentucky
Now I have a question about the fresh air intake side. Manual say any large runs (6 to 8 ft) could starve the stove of air. Problem is mines maybe 16 ft to the outside. If I increase from 2 inch to a bigger supply pipe would that work?
 
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Washed-Up

Minister of Fire
Nov 5, 2011
958
Kananaskis,Alberta, Canada
You could try a 4 inch, I’m sure others will chime in, I installed a Harman P61A with a 10’ 3” and it’s working fine
 

607PelletBurn

Member
Mar 11, 2019
17
13862
I'd be curious about your exhaust side...I haven't done one at my mom's but if we did we'd be in similar situation but the chimney is a 2 story chimney, so a little bit of heat would really pull some air beyond what the convection fan could push/pull. So short question, does your exhaust side have enough vertical to help assist with the air flow?
 

Dayman

New Member
Nov 2, 2021
9
Dunnville, Kentucky
I'd be curious about your exhaust side...I haven't done one at my mom's but if we did we'd be in similar situation but the chimney is a 2 story chimney, so a little bit of heat would really pull some air beyond what the convection fan could push/pull. So short question, does your exhaust side have enough vertical to help assist with the air flow?
According to the Harman manual it should be fine. Just calculate all your piping. As long as it under those allowances. There’s also a max length on the horizontal run.

Equivalent Vent Length: The equivalent vent length for common pellet vent components are:
• 90° Elbows or Tee: 5 EVL Units
• 45° elbow: 3 EVL Units
• Vertical Pipe or Liner: 1⁄2 EVL Unit
• Horizontal Pipe or liner: 1 EVL Unit
The total allowable equivalent vent length is: • 20 EVL for 3” pellet vent pipe or liner.
• 30 EVL for 4” pellet vent pipe or liner.

Now if you move to a comfortbuilt stove they actually tell you the feet. See attached. I’ve been reading a lot to make sure the install will work.

I think I’m going to increase the size of the fresh air just to be safe. It should be fine

E6D6BB49-53C3-4197-B707-FC57F0633941.png
 

Washed-Up

Minister of Fire
Nov 5, 2011
958
Kananaskis,Alberta, Canada
 

White00s10

New Member
Feb 24, 2021
33
Concord NY
I ran into a similar issue with my Harmon PB-105. My stove is in the basement 10Ft below grade, and the back of my house gets pretty deep snow, so i wanted my fresh air intake to come up about 3Ft ( like a snorkel) I used 4" galvanized ductwork to make a snorkel for the outside portion and ran as much as I could inside. i reduced that down to 3" and flexible dryer ducting for the rest of it. Stoves been burning great for 2 months, no issues.

I also ran the chimney straight up thru the soffit, so I have sufficient draft to help pull fresh air into the stove.