Hot Water Helper for long runs.

Discussion in 'Tankless Water Heater Forum' started by fcompagnari, Apr 17, 2011.

  1. fcompagnari

    fcompagnari New Member

    Messages:
    2
    Location:
    Armanda, MI
    I am looking for any type of Hot water assist system that would hook up to the hot side of the faucet under the cabinet and only dispenses heated water until the hot water arrives from the Hot water tank. Once the hot water arriving is hotter than the set temp pf the assist, it will only then pass the how water tank heated water.
  2. Dana

    Dana In the trades

    Messages:
    2,812
    Location:
    01609
    Small 3-5 gallon electric tanks are availble that fit in many sink-cabinets. If fed by the water from the main HW heating system, it's mainly only running in standby mode (about a 35-50W continuous load.) The volume of water in the pipe from the main hot water heater determines how much volume you need to counteract the dilution. (It takes 90' of 1/2" or 45' of 3/4" copper pipe to add up to a gallon. Min size on the tank would be ~ 3x the water volume of the distribution plumbing.)

    The more expensive solution to install would be an electric tankless in series, but that would involve running a dedicated high current circuit- maybe even a new breaker panel. A tankless throttles back on power as the incoming water temp rises, but you'd still be looking at 10,000W or more to support any reasonble flow before the slug of hot water arrived from the tank.

    In any configuration insulating the near-tank(s) plumbing and the distribution run from the main tank to the remote faucet location with 5/8" or 3/4" walled closed cell foam pipe insulation reduces standby, and extends the time between draws to where it's still hot enough to be useful up to about a half-hour. See: http://www.leaningpinesoftware.com/hot_water_pipes.shtml

    [​IMG]
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,930
    Location:
    New England
    Or, you could put in a hot water recirculation system...probably about the same standby losses as a tank and it would likely provide hot at all locations in the home verses one.
Similar Threads: Water Helper
Forum Title Date
Tankless Water Heater Forum Takagi4 Hot Water Problems Aug 16, 2014
Tankless Water Heater Forum How long is too long for hot water? Jul 30, 2014
Tankless Water Heater Forum Eternal Gas Tankless Water Heater Noise!? Jun 7, 2014
Tankless Water Heater Forum Lifetime of tankless water heaters? Jun 3, 2014
Tankless Water Heater Forum My son sprayed the water hose down my tankless vents! Jun 1, 2014

Share This Page