Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: recs for energy efficient pumps

  1. Back To Top    #1

    Join Date
    Aug 2009
    Location
    SF Bay Area (Lamorinda), CA
    Posts
    122

    recs for energy efficient pumps

    Hi
    we're considering replacing our pool pump if the possible energy savings would make it worthwhile. Our current setup is:
    17K gallon rectangular in-ground concrete pool that was resurfaced with fiberglass by a previous owner. One skimmer and one return, functioning status of main drain unknown.
    Hayward S244S Sand Filter with Franklin Electric 0.75 HP motor and WhisperFlo WFE-3 pump
    1950's-era 17K gallon formerly fiberglass, newly replastered IG rectangle (~15x30'),
    Hayward S244S Sand Filter with Franklin Electric 0.75 HP motor and WhisperFlo WFE-3 pump
    Clear ThermaTex bubble cover
    Manual vacuum

  2. Back To Top    #2
    polyvue's Avatar
    Join Date
    Aug 2009
    Location
    Sacramento, California USA
    Posts
    1,215

    Re: recs for energy efficient pumps

    Quote Originally Posted by PoolCleanerMom
    Hi
    we're considering replacing our pool pump if the possible energy savings would make it worthwhile. Our current setup is:
    17K gallon rectangular in-ground concrete pool that was resurfaced with fiberglass by a previous owner. One skimmer and one return, functioning status of main drain unknown.
    Hayward S244S Sand Filter with Franklin Electric 0.75 HP motor and WhisperFlo WFE-3 pump
    Well, I know some of the right questions to ask....

    WhisperFlo #11512 WFE-3 115/208-230V 11.2/6.0/5.6 Amps 3/4 HP 1.67 SF << Does this describe your current pump?
    If correct, it can be used to compare specs with other pumps. Here is the performance curve diagram for the WFE-3 pump (reference the 'F' curve)

    What size pipe diameter for skimmer and return lines (1.5" 2")?
    Does the main drain have a separate PVC run back to the pad or is it connected to skimmer?
    Why do you suspect it's not functioning?
    What's the pressure reading (PSI) at your sand filter when it's clean?
    Do you know current flow GPM?
    Do you have solar panels? Heater? Spa? Waterfall?
    What type of cleaner? (suction side or vacuum? pressure side? booster pump for cleaner?)
    Do you want to consider a two-speed or variable speed pump (less expensive to operate but higher initial cost)? A new pump will cost $500-1600, excluding labor; the return on your investment will depend on your pool configuration, the relative efficiency of the pump replacement and any energy rebate or tax credit that applies.
    14,555 gal in-ground 16'x29' white plaster Pool w/spa (2007); Goldline Aqua Logic AQL-PS-8 control w/Aqua Cell 15 Salt Water Chlorination (SWCG); Hayward TriStar 1HP (1.85 SF) main / 1.5HP (1.60 SF) spa pumps; Hayward Swimclear cart filter C4025, ColorLogic LED lights; Tankless SP-18-4 electric heater; Polaris 280 cleaner.
    __
    View of spiral galaxy in Ursa Major NGC6217 - Hubble Telescope 2009

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,927

    Re: recs for energy efficient pumps

    The WFE-3 is pretty efficient to start with but a 2 speed or variable speed pump would be better. It depends on how much money you have to spend and how short the payback period you are looking for. Several options:

    1) Replace existing motor on pump with a 2 speed: Equipment Cost: ~$300, Energy Savings ~%50 on low speed
    2) Replace entire pump with a 2 speed: Equipment Cost: ~$500, Energy Savings ~%50 on low speed
    3) Replace entire pump with a variable speed: Equipment Cost: ~$1000, Energy Savings ~%60-%80 (depending on speed settings)

    The true cost savings tends to be a bit less than I showed because the pump is not always run at the lowest speed. This is especially true with a variable speed since the highest cost saving settings have the lowest flow rates so the skimmers and cleaners won't work as well which means you may have to run at higher speeds at least part of the day for effective cleaning.

    Being in a high electric rate region as you are, the variable speeds tend to pay for themselves in only a few years and the 2 speeds in less than a year. But over the life of the pump, the variable speed will save you the most money overall.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  4. Back To Top    #4

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: recs for energy efficient pumps



    I have similar specs and an unhappy electric bill, thinking about replacing mine too. I will note that PG&E no longer offers rebates on 2-speed but still does on variable-speed.
    http://pge.com/myhome/saveenergymone...nal/poolpumps/
    --paulr


    A discussion of one specific brand of pump, that was getting off topic, has been moved to here. JasonLion
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  5. Back To Top    #5

    Join Date
    Jul 2007
    Location
    North Texas
    Posts
    51

    Re: recs for energy efficient pumps

    My intelliflo vs pump has been in service for 30 months, maintaining a 26k IG pool. I estimate the pump and swg uses between 2-8 kwh/day depending on the season, how dirty the filter is, and how much I run the cleaner and water feature. I run it year round turning over between 12k and 21k gpd.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •