1ft Height From Collar for a Water Heater Vent?

[hausdok]

Trying to remember. Think I recall seeing a discussion where someone discussed the requirement for a minimum 1ft height from the collar before the exhaust vent on a furnace or water heater is permitted to turn. Anyone recall that discussion or know what the code cite, if any, was?

ONE TEAM - ONE FIGHT!!!

Mike

[Marc]

2006 IRC: G2427.6.1 (503.6.1) Installation, general.

Gas vents shall be installed in accordance with the terms of their listings and the manufacturer's instructions.

From the Duravent Installation Manual, page 5

8. Connector Rise. plan a minimum of one

foot vertical connector rise coming out of each

appliance

Marc

[Jim Katen]

All of the venting tables require a 12" rise at the appliance.

I hardly ever call it out because I hardly ever see it cause a problem.

[davidmcg]

I have never saw a problem either. But I always defer back to the manufacturer. Codecheck Complete page 168 in Fig. 50 shows 2 feet just for your FYI.

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[John Kogel]

I called this one for repair. I thought it looked like there's been backdrafting. A gas guy said it was fine.

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Correction - It is flame rollout. Thanks, Rob and Tim. Gas guy said it's ok.

[Tom Raymond]

The double barrel arrestors are cool though []

[Brandon Whitmore]

Mike-- this was the discussion:

rise

[JEuriech]

Everything that I have seen so far makes reference to a minimum one foot connector rise for two or more appliances. I have not see anything related to one appliance all by itself.

See Table G2428.3 (1) or G2428.3(2) in the 2006 IRC. Even DuraVent makes reference to "plan a minimum of one foot vertical connector rise coming out of each appliance" This would indicate to me two or more appliances.

However, I have never seen a problem in my area either way.

Jeff Euriech

Peoria Arizona

[Jim Katen]

Everything that I have seen so far makes reference to a minimum one foot connector rise for two or more appliances. I have not see anything related to one appliance all by itself.

See Table G2428.3 (1) or G2428.3(2) in the 2006 IRC. Even DuraVent makes reference to "plan a minimum of one foot vertical connector rise coming out of each appliance" This would indicate to me two or more appliances.

However, I have never seen a problem in my area either way.

Jeff Euriech

Peoria Arizona

Those are good points. I'd like to hear Bob Harper's response.

[Rob Amaral]

There seems to be no backdrafting at the draft-hood... that scorching at the burner compartment area could be a case of flame roll-out? (Burner-related problem?)

[Tim Maxwell]

There seems to be no backdrafting at the draft-hood... that scorching at the burner compartment area could be a case of flame roll-out? (Burner-related problem?)

Or the inside burner compartment shield not in place. I see that one often because some are kind of difficult to get in place so they just lean it up or leave it off.....

[kurt]

I think it's a "standards typo". It could say "any appliance", or "all appliances".

It's not entirely clear, but I always thought it was indicating individual appliances.