Boiler-Natural Vent through Foundation Wall / Propane Regulator Vent

[rscrofani (Rick Scrofani)]

Hi all-
2 things i have not see before…appreciate feedback information

1. Propane regulator- looks like vent is extended by pvc pipe>>Assume is this due to generator?
   If yes- does anyone have clearance/requirement info?

2. Boiler- Natural vent connects to B-vent through foundation/not terminated above the roof.

   Have never seen installed through foundation/terminated roughly 48"… I am familiar with through the roof spec. Trying to find anything that states can not be through foundation/terminated so low…etc
   Anyone have any reference info?
   I appreciate it.
   Thank you
   

   

   
   
   

   

   
   

   

   
   

   

[kleonard (Kevin Leonard, CPI/CMI)]

The regulator vent is fine IMO.

The B-vent is wrong and I would write it up as improper installation and as a potential burn hazard.

[rscrofani (Rick Scrofani)]

Thank u kevin. Do u happen to have any documentation that confirms what makes it not acceptable?
I like to educate myself…
Appreciate it.

[kleonard (Kevin Leonard, CPI/CMI)]

Besides the obvious potential burn hazard, I would recommend checking the MFG installation instructions for the boiler.

[lhenderson2 (Lon Henderson, CMI)]

The “crime” may be the elbow at the vent cap. The cap should be vertical. I don’t think there is a code against B-vent flue going up the side of the house. The vertical section must be the same length or longer than the “horizontal” run and most flue designs have only two 90-degree elbows.

[kleonard (Kevin Leonard, CPI/CMI)]

Would this apply to this installation Lon? @lhenderson2

[msenty (Michael Senty)]

@kleonard This is the one I keep on my clipboard. Same as yours, but includes the roof pitch table, along with flat roof applications.

[rscrofani (Rick Scrofani)]

Couple update points…

1. Boiler installed 1993/94 (+/-30yrs old)
2. Found boiler manual (https://www.weil-mclain.com/sites/default/files/field-file/he-ii-manual_1.pdf)
   Looks like sidewall venting was ok per manual
   
   
3. Nothing shows for exposed flue and termination options shown are elbow or hood

[lhenderson2 (Lon Henderson, CMI)]

Yeah…I thought about the 2-10 rule, also. The manufacturer’s instructions should describe what’s allowed, but I think you are correct about calling out a 2-10 violation.