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  1. #1
    Join Date
    Jan 2005
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    Littleton, CO
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    Tankless H2O

    Exterior Tankless water heater install. Replaced 2-50 Gallon tanks with on tankless.
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  2. #2
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    Feb 2012
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    Toronto Canada
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    Cool I have never seen an outside tankless water heater. Don't think it could take a canadian winter EH!
    Nice install

  3. #3
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    Apr 2012
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    new york
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    relief valve should be piped 6 inches from ground or at least face it down so when it goes off it doesnt hit someone in the face

  4. #4
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    Quote Originally Posted by OldSchoolMech View Post
    Cool I have never seen an outside tankless water heater. Don't think it could take a canadian winter EH!
    Nice install
    Sure, just need a little thicker insulation and plenty fo heat trace.

    You can do exterior in Colorado. I thought it still got pretty cold there. Seems a little risky if the power goes out for a period of time.

    Wheres the pipe insulation?

  5. #5
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    It was directed to the ground. That picture was a mid shot.
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  6. #6
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    Feb 2011
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    Cloverdale,Ca
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    Never seen a horizontal left tankless before!
    Living the dream !!

  7. #7
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    Thread Starter
    The pipes are in the lower box and insulated and heat taped. If the power goes out there is an auto valve in the basement that opens and drains the lines.
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  8. #8
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    Dec 2002
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    Rochester, MN
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    Isn't still cold in the winter in CO for this to be outside??

  9. #9
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    May 2011
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    Quote Originally Posted by mayguy View Post
    Isn't still cold in the winter in CO for this to be outside??
    Not according to the manufactures but I used to live in CO and it got down to -18*F one night when I was oncall.

  10. #10
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    Thread Starter
    It does get cold in Colorado from time to time. This has been installed for 2 years going on its 3rd winter season coming up and haven't had any issues. We check the heat tape and the auto valves on the pm to verify operation. The heater will also fire for a few seconds so the exchanger won't crack, a feature from Rinnai
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  11. #11
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    Jun 2002
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    south jersey
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    My neck hurts from trying to look at those pics. Looks like they finished the stone face wall and dryvit around the new unit and electrical meter.
    You need to put the phone down and get back to work!

  12. #12
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    Thread Starter
    The electrical meter was existing when the owner bought the home. He wanted the water heater to match that finish, so that is what was done. We cut the existing stucco and some rock then finished back around the unit.


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  13. #13
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    Feb 2007
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    Helena, Montana
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    So how much money are you really saving having to run heat tape all the time? Just curious, but it doesn't seem like the pay back would be there. A vacation home I can understand the logic.

    And I still wouldn't try it here. We have at least a week of - double digits. Actually had my truck thermometer read -35 one morning.
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  14. #14
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    He didn't care about any savings. He wanted the room to build an entertainment rack / system, as there was no where else outside it went.


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  15. #15
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    Feb 2007
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    Well that makes sense then!
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  16. #16
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    Jul 2012
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    Good looking job. We have had terrible luck with these units however. Split HEs and rinnai does not support them very well. When HE goes there is typically collateral damage since all controls are below HE.

  17. #17
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    That was one negative I read about Rannai. They use relatively thin walls on their HE and it's not Stainless Steel.... which then means it's probably a more compact HE but is probably more sensitive to scaling.

  18. #18
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    Jan 2005
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    Thread Starter
    You do have to keep up on the cleaning of the exchanger. I've gotten away with every 2 years on my heater but some we need to do every year. Just part of the equipment I guess.


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