Question
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Nov 5, 2009, 04:29 PM
| | Full Member  | | Join Date: Jun 2008
Posts: 353
| | | Max Distance for Gas Tankless Water Heater Venting
I am considering purchasing a gas water heater but have some concerns about the venting. Everything I've read seems to indicate that the heater vent must exit the house within 10' of the heater. Due to my home's configuration, the minimum distance is about 25'.
Am I totally out of luck? Are there any options for my situation?
Thanks!
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Answers
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Nov 5, 2009, 04:34 PM
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#2
| | | Home Repair & Remodeling Expert
Join Date: Dec 2006 Location: Wheaton, Illinois, USA
Posts: 15,392
| I think you are out of luck unless you can consider electric which needs no venting. Now here is another approach, mount the heater on an outside wall and run 25' of 3/4" copper pipe to and from the heater. |
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Nov 5, 2009, 05:12 PM
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#3
| | Full Member
Join Date: Jun 2008
Posts: 353
| Thanks so much. Hmm. I've honestly never seen a water heater outside. Would I need to build a structure to house it? It gets pretty cold here in the winter, what do I need to do to keep things from freezing? Is the heater less efficient because it is out in the cold? | |
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Nov 5, 2009, 05:35 PM
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#4
| | | Home Repair & Remodeling Expert
Join Date: Dec 2006 Location: Wheaton, Illinois, USA
Posts: 15,392
| No you misunderstood me. Put it on an outside wall of the basement but still inside the basement. That way you drill through the cement wall or whatever the wall is in that part of the house. Drill a core can run $250 on up so if you have any stud wall in the basement mount it there and just run 3/4" copper pipe from your old heater location to the new location. | |
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Nov 5, 2009, 05:38 PM
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#5
| | Full Member
Join Date: Jun 2008
Posts: 353
| I see. Unfortunately we are in a rowhouse, so only 2 exterior walls. Given the layout, mountint it on one of them just isn't an option. | |
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Nov 5, 2009, 05:46 PM
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#6
| | | Home Repair & Remodeling Expert
Join Date: Dec 2006 Location: Wheaton, Illinois, USA
Posts: 15,392
| Where then did you plan to terminate the vent when you first said you needed to run the vent 25' | |
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Nov 5, 2009, 05:50 PM
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#7
| | Full Member
Join Date: Jun 2008
Posts: 353
| It is a finished basement, so there aren't a lot of options for placement. I would have run the vent through a soffit and out an exterior wall, but it isn't possible to place the whole unit there. | |
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Nov 5, 2009, 05:52 PM
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#8
| | Home Repair & Remodeling Expert
Join Date: Dec 2006 Location: Wheaton, Illinois, USA
Posts: 15,392
| The whole unit is the size of a suitcase hanging on a wall, why can't you mount it there?? | |
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Nov 5, 2009, 05:56 PM
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#9
| | Full Member
Join Date: Jun 2008
Posts: 353
| The only viable option would be to hang it in the bathroom. It is a relatively small bathroom, it just wouldn't fit. Plus it would be very far from the gas line.
I guess I will just stick with a standard tank. Oh well! | |
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