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Venting a water heater through a wall

0 votes
I would like to vent a hot water tank through a side wall. Can I do this without using a powered unit? I was hoping if I went up a foot for every foot of horizontal the draft will be sufficient. I will also install a thimble in the wall to separate the exhaust pipe from combustibles. The distances from any openings back into the house meets my local codes.

Any suggestions?

asked in Gas Water Heater by jks (140 points)
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1 Answer

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If it is a natural vent type water heater you cannot vent it through the side wall, it has to vent / discharge exhaust fumes above your roof. You can call water heater’s manufacturer and ask them if your particular unit can be converted into a power vented appliance / fan induced venting (unlikely), and ask with your local building authorities if they would approve such installation but I doubt it.
answered by darekrudy (21,730 points)
Thanks for the advise.  I'm trying to avoid buying a new power draft unit as the one I have is only a few years old.

Can I run the exhaust up past the roofline once it's outside the building?  Will this give me enough draft to make it safe?
follow up question


smiley I can’t tell you yes or no because the requirements for such installation are based on conditions / values that you didn’t mention and on your house’s shape, positioning of this new chimney / vent pipe. 
What I would suggest is to go over my articles: 
And after that open this publication (Gama Tables For venting gas appliances):
It would be best if you read the first few pages before the actual tables begin so you understand everything.
An example of a situation just like yours is on the page #19 (example 1) – read the whole thing and scroll back to page #10 / Table #2 to calculate your chimney dimensions.
Let me know if you have more questions.