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Thread: Exterior water heater
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03-14-2014, 12:05 PM #1
Exterior water heater
This water heater is on the outside in a cabinet. It is back drafting as seen by the melted plastic washers at the supply hook up as well as my fogged camera lens. But it is on the outside so is that an issue. How would you stop it from back drafting? Also it was right at a door. How far from an opening does this type of installation need to be?
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03-14-2014, 12:42 PM #2
Re: Exterior water heater
' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.
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03-14-2014, 12:55 PM #3
Re: Exterior water heater
The water heater also needs to be listed for outdoor use.
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03-14-2014, 04:46 PM #4
Re: Exterior water heater
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03-14-2014, 05:16 PM #5
Re: Exterior water heater
Ren,
I think that was the intended point of the enclosure, but I'm not sure the water heater was intended to be placed in that enclosure and then placed outside.
What was the name on the enclosure? The same as on the water heater?
The reason I questioned it was because I doubt that vent is high enough for that water heater, which would mean that it was something someone cobbled together and that it is likely that the parts are not listed for use together.
I found this: r-24 - Watts Search Results but if you go through the tabs there is no literature, no approvals, etc. available for it.
That same enclosure is shown in a larger photo here: Watts 24 in. W x 24 in. D x 72.5 in. H Galvanized Steel Water Heater Enclosure-R-24 at The Home Depot but it is a Watts enclosure and it is not listed and has no literature available (according to the Watts site).
The enclosure in your photo does not look like that (as I recall, I have to submit this post to go back and look at the photo again).
The minimum required height of the vent is 5 feet above the draft hood - that was the first thing which indicated to me that it was probably not good.
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03-14-2014, 05:23 PM #6
Re: Exterior water heater
' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.
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03-14-2014, 05:25 PM #7
Re: Exterior water heater
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03-14-2014, 05:43 PM #8
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03-14-2014, 07:01 PM #9
Re: Exterior water heater
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03-14-2014, 07:07 PM #10
Re: Exterior water heater
I take that back. It may be just as sketchy as home depot. Check these out http://myaquahut.com/aquahut-parts.p...ahut-parts.pdf They show a short vent. I think that is definitely one of the issues. And a little more. http://www.google.com/url?sa=t&rct=j...xYIx-RUHk-AZzg
Last edited by ren ramsey; 03-14-2014 at 07:13 PM.
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03-14-2014, 07:28 PM #11
Re: Exterior water heater
This is what I found on the AquaHut water heater enclosure:
- http://www.fieldcontrols.com/pdfs/46263400.pdf
- AquaHut : Outside Water Heater Enclosure
- Would You Consider an Outside Hot Water Heater? | Apartment Therapy (links to Watts, AquaHut, and HoldRite)
I don't find anything which says any of them are listed ... I'd be very wary of something like that, especially when: (bold and underlining are mine)
- From the IRC (2012, but it is the same all the way back)
- - M1804.2.3 Natural draft appliances. - - - Vents for natural draft appliances shall terminate at least 5 feet (1524 mm) above the highest connected appliance outlet, and natural draft gas vents serving wall furnaces shall terminate at an elevation at least 12 feet (3658 mm) above the bottom of the furnace.
The vent needs to be at least 5 feet minimum measured from the draft hood to the outlet of the Type B gas vent cap, and the cap needs to be a listed Type B gas vent cap.
I guess the people who make those things go "Hey, Dude ... that is outside, it ain't gonna kill nobody if'n it ain't ventin' properly."
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03-14-2014, 07:33 PM #12
Re: Exterior water heater
It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
Billy J. Stephens HI Service Memphis TN.
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03-15-2014, 04:47 AM #13
Re: Exterior water heater
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03-15-2014, 05:03 AM #14
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03-17-2014, 08:32 AM #15
Re: Exterior water heater
The reasoning behind the 10 and 2 rule would also apply to this for proper venting, even if this is not a vent at the roof. The wall is acting as an obstruction, preventing proper venting.
Apollo Home Inspection
St. George UT
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03-18-2014, 04:58 AM #16
Re: Exterior water heater
If the venting does not extend above the roof line expect condensation to saturate the wall over time. It is inevitable.
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03-18-2014, 05:06 AM #17
Re: Exterior water heater
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