Water heater advice...

Discussion in 'General Plumbing Help' started by steph746, Dec 29, 2016.

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  1. Jan 5, 2017 #61

    Deerslayer

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    I'm pretty sure atmospheric 75 gallon heaters are no longer available?
     
  2. Jan 5, 2017 #62

    voletl

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    Yeah I think anything over 50 gallon now has to be direct vent
     
  3. Jan 5, 2017 #63

    steph746

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    I see..can direct vent be vented out of a chimney?
     
  4. Jan 5, 2017 #64

    voletl

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    Yeah if you run the PVC pipe all the way down your chimney the point of a direct vent besides being more efficient was to eliminate the need for a chimney
     
  5. Jan 5, 2017 #65

    frodo

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    do your research first. you are only allowed X amount of 90's on a direct vent
     
  6. Jan 6, 2017 #66

    steph746

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    Sorry...not sure I follow you. What are "90's"?
     
  7. Jan 6, 2017 #67

    frodo

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    on your vent, a 90 is a 90 degree offset.

    in the literature that comes with the unit. they will tell you, you can offset "X" amount of degrees

    you can not go over that. last unit I installed was allowed 180 degrees in offsets

    that is 2, 90 degree turns. and 3' total horizontal run
     
    Last edited: Jan 6, 2017
  8. Jan 6, 2017 #68

    Deerslayer

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    Direct vent DOES NOT USE PVC OR EXISTING CHIMNEY
     
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  9. Jan 6, 2017 #69

    SHEPLMBR

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    Bradford and State both still have an atmospheric 75
     
  10. Jan 6, 2017 #70

    Deerslayer

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    Not in residential?
     
  11. Jan 6, 2017 #71

    KULTULZ

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    EXCERPT SOURCE-http://plumbingengineer.com/content/pvc-acceptable-vent-material-flue-gases
     
  12. Jan 6, 2017 #72

    steph746

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    Direct Vent or Atmospheric Vent units would have relatively the same efficiency? The difference is that they just vent differently? The current tank vents out the chimney. My thought was to replace it with an atmospheric tank that would vent out the chimney as well. I might have to have the chimney lined, but I would prefer that since I would not have to have another hole in the house.

    However, if a direct vent tank would be more efficient, I would go with that and have the hole created for a direct vent.
     
  13. Jan 6, 2017 #73

    Deerslayer

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    A direct vent uses outside air vs conditioned air for combustion that is how they gain efficiency.
     
  14. Jan 6, 2017 #74

    voletl

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    So please inform me what materials you use to vent.
    So I'm just going to think that all the manufacturers of the water heaters who send PVC fittings with the the water heater are clueless and not to even mention high efficiency furnaces that use PVC for flue

    And you can reuse the existing chimney as long as the pipe is brought down through the chimney and then connected to the water heater.
     
    Last edited: Jan 6, 2017
  15. Jan 7, 2017 #75

    Deerslayer

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    Power vent heaters use PVC typically. Direct vent uses metal venting
     
  16. Jan 7, 2017 #76

    voletl

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    My mistake I interchanged power vent with direct vent.

    When I refer to a water heater that vents out a chimney I call it atmospheric vented
     
  17. Jan 7, 2017 #77

    KULTULZ

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    :(

    Did you bother to read the TECH ARTICLE I posted above?

    You want SS Double Wall B-Vent.

    Hopefully ( :rolleyes: ), the contractor you choose will be licensed and insured, ethical and pull a permit on the installation.

    Vent- Direct vs Power.jpg

    Vent- Double Wall (B-Vent) & Single Wall.jpg
     
  18. Jan 9, 2017 #78

    SHEPLMBR

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    YES. Bradford RG275H6N
     
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  19. Jan 9, 2017 #79

    SHEPLMBR

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    I pray that you have a reputable company to come do this. Direct vent is metal that comes up and out the side of the house. Made with specialized venting that comes with the water heater. Atmospheric venting will get hot and needs to be b-vent style pipe up and out the roof. Power vent and power direct vent uses pvc. It's up to you to read up on the efficiencies.
     
  20. Jan 9, 2017 #80

    frodo

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    before you spend money on stainless steal vent pipe
    make sure that is what the manufacture of the water heater you bought requires

    most will require double wall b vent that is NOT stainless.
     

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