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Thread: Point of Use Water Heater

  1. #1
    Join Date
    Dec 2006
    Location
    Pennsylvania
    Posts
    361

    Point of Use Water Heater

    I want to install a point of use water heater for the future sink in my shop. Basically, this sink will just be used for cleaning brushes, watering plants, washing hands, etc. This will not be inline with another water heater; it will be the sole source of hot water. I don't know anything about these heaters but I see they come in different sizes, 2, 4, 6 gallon. Could I get some advice on these things? What size do you think I'd need for what I'd be using it for?

  2. #2
    Join Date
    Dec 2006
    Location
    West Central Ohio
    Posts
    147
    Rob,
    When we remodeled in late 2000 we put in a 1/2 bath right inside the entry door from the garage. Thought that it would help with the grand kids tracking clear through the house. I put the 2 gal in the cabinet under the sink because of the long run from the main 90+ water heater. It has been a good one so far. Saves on water also. Mine reheats in less than 3 minutes. Washing brushes you might want to consider the 4 gal though.
    Hope it helped,
    Chuck

  3. #3
    Steve Clardy Guest
    I have a 2 gallon in the shop sink. Works well for washing hands, rinsing out the coffee pot.
    Anything else. it runs out of hot water pretty quick.
    But I don't use it for washing dishes or anything like that.

  4. #4
    Join Date
    Nov 2006
    Location
    Austin, Texas
    Posts
    1,346
    Two questions that bias my suggestion...

    If you only use the shop occasionally, I suggest a 2 gallon, so it reheats fast when you turn it on, and you can leave it off when the shop is not in use.

    If you have heat on much of the year, even at a low level, it doesn't matter, so get a larger unit. The extra cost is usually very small, the extra capacity may occasionally be helpful, and if you leave it on all the time (since reheat will take much longer) the heat loss will contribute to the heating of the shop.
    Charlie Plesums, Austin Texas
    (Retired early to become a custom furnituremaker)
    Lots of my free advice at www.solowoodworker.com

  5. #5
    Join Date
    Nov 2006
    Location
    Constantine, MI
    Posts
    6,974
    Or.....

    You can install one of these and have CONTINUOUS hot water.

    http://www.continuoushotwaterondemand.com/home
    “We all die. The goal isn't to live forever; the goal is to create something that will.” - Chuck Palahniuk

  6. #6
    Join Date
    Oct 2006
    Location
    Placitas, NM in the foothills of the Sandia Mt
    Posts
    688
    Quote Originally Posted by Rennie Heuer View Post
    Or.....

    You can install one of these and have CONTINUOUS hot water.

    http://www.continuoushotwaterondemand.com/home
    Hey Rennie,
    I have a friend who asked about those tankless water heaters. Do you have one? Do you like it?
    thanks,
    Jess
    Don't believe everything you think!

  7. #7
    Join Date
    Nov 2006
    Location
    Constantine, MI
    Posts
    6,974
    Nope - don't have one. Have considered it many times.
    “We all die. The goal isn't to live forever; the goal is to create something that will.” - Chuck Palahniuk

  8. #8
    Join Date
    Nov 2006
    Location
    Austin, Texas
    Posts
    1,346
    I don't have a continuous/instant hot water heater but on forums I have heard a few people say they love them but more people who say they don't last long... sometimes as little as a year or two (scary for something that expensive).

    To get the fast heat transfer, people agree that the water goes through small passages over the heating element. My hypotheses to explain the various comments is that water with a low mineral content is probably fine, but if you have hard water (minerals or sediment) the fine passages near the heater probably plug too soon, leading to short life. Some who recognized that the heater was plugged said that they weren't successful cleaning it out.

    So, although I haven't used one, based on forum discussions, my bias is not to try.
    Charlie Plesums, Austin Texas
    (Retired early to become a custom furnituremaker)
    Lots of my free advice at www.solowoodworker.com

  9. #9
    Join Date
    Oct 2006
    Location
    Tokyo Japan
    Posts
    15,582
    That is all we have here in Japan, ours is gas fired and is now nearly 8 year old, the warranty is for 12 years.

    I love them, with a wife and two daughters at home, I'm often the last one in the shower, and if we had a tank, I'd be having short showers!!

    Cheers!
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  10. #10
    HI.

    When we built in 2002, I had a tankless electric on-demand heater installed for the two bathrooms in the bedroom area. My unit is large, 36 Kw, and delivers plenty of hot water. As soon as the unit senses that there is a water flow through the unit, it kicks on. Ii has three stages that act independently so it uses only enough electricity to heat the water to the preset 120 degrees. Temp is not adjustable. I bought my unit over the Internet from a company in Florida called Tankless Inc. They have sizes from single faucet up through heating swimming pools.

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