According to a section on venting it is suggested that in cold climates the vent pipe should be kept in the envelope of the home to insure maximum draft especially in the event of a power failure. So is this something that should be brought up to the customer, for an install, where we are in New England?
NFI Rcomendations
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Personally, I would tell them that there needs to be some vertical in the PV run for EXACTLY that reason (drafting). Harman even recommends a 5' minimum rise, but it doesn't have to be within the envelope of the home. Maybe that question should be asked at an NFI Pellet Certification course...
Bioburner
Moderator
I had a 4 foot of venting outside when it got real cold,-10, that after a night was almost totally frozen at the end. Was a horizontal run. Was running on low. I don't recommend to much outside in extreme conditions. Now -10 is what the daytime high is what Thursday supposed to be.
kinsmanstoves
Minister of Fire
Yes it should be and I am thinking this is directed at wood stoves and not pellet units. Forced draft is worlds different from natural draft.
Eric
In Canada a 5' vertacle is required for a WETT inspection and insurance companies require it in order for homeowners insurance. This is to add in draft in the event of a power failure.
Also I have found that stoves generally burn better with the 5' rise and have fewer problems with poor combustion at 40 below when the wind is blowing. It is a Harman requirement for warranty as well.
kinsmanstoves
Minister of Fire
smwilliamson
The Stove Guy
Harman recommends 5 feet but there is no warranty contingency and their technical drawings also show a direct out without rise ....or am I thinking of something else?
Rise within the house is always better, for draft, for maintenance and for aesthetics...if you use painted 4" venting or that kick-ass adapter to fake out that 6" look
No it's not. Like Scott said, if it was the straight-out-the-rear venting option wouldn't be shown in the manuals...
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