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Thread: the new 'more efficient Rheem'

  1. #1
    DIY Junior Member ilmbg's Avatar
    Join Date
    Dec 2009
    northern wyoming

    Default the new 'more efficient Rheem'

    What is this new Rheem- the one that take heat from the air? I live in northern Wyoming where:
    1. Our electricity rates are sky high- co-op is almost double than the city.
    2. I use the tub 1-2 times a day to soak for 1/2 to 1 hour due to a severly injured neck/back.
    3. Well water- extremely alkaline.

    The currnet wh is 8-9 yrs old. I always tried to flush it, but when it was about 4-5 years old there is so much scale in it (up to the lower element that it won't flush out anymore).

    Would this new Rheem be worth it?
    I think it comes in a 50 gal, which I would like.

    Would there be a better one?

    Would a 3/4" quarter turn ball valve help me flush it out easier?


  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    can't help on the WH, but using a 3/4" full port ball valve would allow you to more easily shove a coat hanger, or rod into the bottom of the tank to help dislodge built-up crud during the flush.

    You might want to consider a water softener and conditioner...things would last longer.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default heater

    IT is a heat pump water heater, like an air conditioner in reverse. IT uses electricity to run its compressor, and one byproduct should be more cool air in the house.

  4. #4
    In the trades Dana's Avatar
    Join Date
    Jan 2009


    Quote Originally Posted by hj View Post
    IT is a heat pump water heater, like an air conditioner in reverse. IT uses electricity to run its compressor, and one byproduct should be more cool air in the house.
    Which is exactly what you're looking for in the snowy WY highlands in January, eh? ;-)

    Tank top heat pumps have GREAT benefit in cooling dominated climates, but in heating dominated climates they're only as efficient as your heating system, less the power required to run the pump (net efficiency is far lower than an indirect-fired tank on a heating boiler, f'rinstance.) If you're heating with really cheap fuel (far cheaper than electricity), you may have some benefit from one of those. But the coeffeiciency of performance on 'em are typically ~ 2.0 (it takes a kwh of power to pump 2kwh of heat into the tank, and you have to provide that 2kwh of heat with the heating system), and the first-hour ratings on 'em are pretty abyssmal compared to a fossil fired tank (or even a higher power electric tank.)

    And they'll sludge-up as fast as any tank heater wood, no advantage there.

    I'd consider one only if I lived someplace with 2000 cooling degree-days per year or higher, where the annual net-benefit of the reduced cooling load more than breaks even on the adder to the heating load during the cooler months. I'm gonna go out on a limb here and guess that this climate doesn't exist anywhere in WY.

  5. #5
    DIY Senior Member Runs with bison's Avatar
    Join Date
    Aug 2009


    The heat pump units have a range of operation from about 1.0 (resistance heating) to 2.0 (heat pump.) They use resistance heating backup. They typically have some charts showing a range of likely performance depending on your climate (1.0, 1.2, 1.5, 2.0). My guess is you would do little better than resistance heating in WY.

  6. #6
    Master Plumber master plumber mark's Avatar
    Join Date
    Feb 2005
    indianapolis indiana - land of the free, home of the brave....
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    Talking new technology can still leak

    keep in mind that this new water heater
    that is worth about 1700 plus installation
    can still spring a leak in 7 years from now or sooner.

    getting it repaired would be a new experience too
    for the fellow that installed it..

    sitting a per heating tank next to a normal electric heater
    wrapped in a blanket might be something to consider....


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