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How not to vent a Gas condensing boiler
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"Reducing our country's energy consumption, one system at a time"
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Baltimore, MD (USA) and consulting anywhere.
https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
You can choose to do what you want, but you cannot choose the consequences.
Homeowner job?
RTV coated flue. Must be a new design.
I am surprised the off gassing from the curing RTV didn't take someone out.
not knowing any better I used it to line a rusted exhaust suction fan cavity on a Carrier nat gas flat roof HVAC unit we owned. When I tested it red hot burning bits of red "fire-proof" RTV blew out........ I replaced it.
Click here to learn more about this contractor.
But code book writers and inspectors don’t have to clear frozen intakes when it’s -15F outside in 2’ of snow.
FWIW- I have read regarding mod-cons that it desirable to use outdoor air for combustion vs. indoor air whenever possible because the outdoor air is generally "cleaner".
https://www.supplyhouse.com/Spears-P444X-030-3-PVC-DWV-Cleanout-Tee-w-Standard-Plug
The clean out is a good idea on longer runs.
I wouldn't think you would be venting at 600+ into that vent.
Like I said, not defending anything in that picture.
That combustion air gets heated regardless of where its introduced, direct or indirectly. So there no change to net system efficiency.
We use 2 pipe where it’s nessesary. Most of these installs were previously B vent or chimney vent furnaces at one time, and most were just gravity coal furnaces before that.
Can I play?
I'll add this beauty....
> And the inspector passed this?
That's a 50 50.
Are you surprised if one did?
> I'll add this beauty....
Is the intake teed into the exhaust?
> > @Timco said:
> > I'll add this beauty....
>
> Is the intake teed into the exhaust?
EGR.
It helps cool peak combustion temperatures which allows a leaner mixture without knocking.
That couldn't have run more than a few seconds before it started convulsing
Easy fix since it’s not newer tight construction. Just make it 1 pipe.... assuming HTP/Westinghouse allows that.
Not really. One inspector approved my new heating system when there was a 12 foot (or so) long piece of bright yellow CSST gas pipe going straight across the garage (where my heating system is) that was neither bonded nor grounded. A different inspector approved the condensate drain just dumping the condensate on the ground outside. Another inspector ... . The list never ends.