Condensing boiler vent creates HUGE ice formation on roof!

beeper

Easy fix, remove the fittings back to the gutter and install a

45 degree fitting with screen were the 90 is facing upward so the condensate rolls back in to the trap at the appliance and the gas goes up in to atmosphere. Done deal

ScottMP

Gary

Fish or cut bait.

I know they don't want to move it but IT HAS TO BE DONE.

There are no other options.

Scott

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Lenny_3

Re: Classic Lost in Space

Classic !!!
The Best yet a Lost in Space Quote, I love it !!
I can see Robot on the deck with his arms flailing , while Will rushes to gather his tools to get out of there, and here comes Doctor Smith around the corner with a team of liability attorneys.
Truely a classic

TomStayer

MZ Snorkel solved

The solution is quite simple:

Cut the flue pipe off just before the final turn-down elbow or just below the turn-to-the side elbow. The
flue pipe is supposed to vent straight up. What rains in goes right down through the condensate trap.

I would have gotten to this sooner but I was out visiting MZ's manufacturing plant. Wow! What a place!

Kal Row

yeah, and the rain will dilute the acid...

and save your pipes, unless you live in the northeast - where the rain IS condensed flue gas to begin with

Kyle Kubs - Benchmark Home Inspections

Not to code....

Gary I agree totally with Dave on this.

""Author: Dave Kliman
Subject: can't be outside like that


if you go to weil-mclain's website, they have a vent suppliment to their ultra boilers.

http://www.weil-mclain.com/FTP/Ultra 310/5501012350903Vent.pdf

the manual clearly states that these vents must not have very much pipe outside whatsoever. either the vents terminate right at the wall from the basement a foot above the snow line or they terminate pointing straight up out of the roof. this huge icemaker pipe that goes all those feet outside is a deathtrap waiting to happen. ""

And if I'm interpreting the pictures right, it would still be wrong even if the vent terminated just on the outside wall as it should - as per code it cannot be so close to the windows _if the vent is on the same plane as, or below a window-it must be a minimum 10' horizontally from that window. - From all appearences this was when first installed and is now as much of a death trap as the original system. Can't the pipe be re-routed inside to come out a different wall where it will not be to close to an opening? You can't have that much pipe outside without freezing...

Unknown

This is NOT a WM Ultra

Here's the thing,,,


I'm not going to change anything other than suggest to the home owners that they follow the manufacturers reccomendation. Monitor is telling us that by removing the 90º or 90ºs this adaptation of venting MPI's MZ is acceptable. They will also put this in writing.

I'm no authority on coaxial venting and I'm sill not sure why this would be ok but it is. Seems to me that the flue/intake pipes should be equal in developed length. I'm not licensed in this NE state but would think that if the manufacturer ok's the application, the city/town would also approve of same.

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Unknown

BTT

This (MPI) fix sound right to you fellows?

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H. Green

Proposed fix

Check with the local authority. Some inspectors, wisely, interpret the codes to preclude substantial lengths of exposed single wall vent.

The appliance listing MAY not preclude this solution, but it is certainly not 'ideal'. Before signing off on the solution, perform combustion tests on several different days, with the wind at different speeds and directions, and at different out-door temperatures. With this configuration the draft effects will substantially impact the pressure balance required for proper operation of a direct vent appliance. The ANSI boiler standard does not require any testing on an installation even closely resembling the situation depicted here, rather it requires only the use of the manufacturer's specified terminal.