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Thread: Quiet, efficient, reliable heat pump recommendations.

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    Join Date
    Jul 2014
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    Melbourne, Australia
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    Quiet, efficient, reliable heat pump recommendations.

    Hi all,

    I'm looking to heat pump that is quiet (to reduce potential neighbor grief) and is reasonably efficient and can heat at low ambient temperatures.

    I was thinking something like the Zodiac PowerFirst 15D - which heats and cools (so can do low temps) but the largest model in that range has fairly lowish output (3.6kw in, 15.7 out) and I'm not confident that it would heat my 55,000L outdoor in-ground pool during the cooler months where max daytime temps are often ~10deg C (50F). Although it has an awesome decibel rating of 40dB compared to the common 50+ of most other models that I've seen. The AstralPool one is ~58dB.

    http://www.zodiac.com.au/Content/cms..._datasheet.pdf

    Does anyone know of anything else that is comparable but has a bit higher output (I'm after something ~5kw in - ~20+ out) - single phase with sub 50dB sound? I'm struggling to find anything else that is below 50dB. Any recommendations?

    Cheers,
    Dave.
    55,000L outdoor IG concrete plaster pool (14530 gal) - built in 1980 refurbished in 2007. Astral eQuilibrium 3 with pH & Orp, Viron eVo p320 pump, Cantabric C320 filter with glass, FlowVis Flow Filter. Taylor K2006C test kit.

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    ps0303's Avatar
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    Jul 2011
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    FL
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    Re: Quiet, efficient, reliable heat pump recommendations.

    Unfortunately you will find that heat pumps lose their efficiency once temperatures get low. At day time temps of ~10deg C (50F), you won't get much warmth out of it at all. It's just the nature of the beast. Seems that you are doing your homework so I'm sure you already knew this though. Once you get into the warmer day time temps, you will be able to extract heat and put it into your pool water. Do you just have a pool or do you also have a spa?
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Quiet, efficient, reliable heat pump recommendations.

    Thanks Paul,

    I did see the efficiency ratings drop the lower the temp goes - most seem to be around 4 COP at around 10deg C (50f), that was one of the reasons I wanted to get the largest type I could on single-phase.

    The heating + cooling types are needed to melt the ice that apparently starts to build up at ~10deg C so it lets you run it at even lower temps (although like you say - the efficiency drops).

    I think I'm becoming convinced that I should change my plan and choose a heat-only pump - there seems to be a few more options if I go that route. Considering they still heat to some degree down to ~10deg that should probably be ok - I'll just close the pool over the really cold months.
    55,000L outdoor IG concrete plaster pool (14530 gal) - built in 1980 refurbished in 2007. Astral eQuilibrium 3 with pH & Orp, Viron eVo p320 pump, Cantabric C320 filter with glass, FlowVis Flow Filter. Taylor K2006C test kit.

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    Ukie's Avatar
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    May 2012
    Location
    Export, PA
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    83

    Re: Quiet, efficient, reliable heat pump recommendations.

    I have HeatSiphon unit. It looks much bigger compare to Zodiac. Here's HeatSiphon specs http://www.heatsiphon.com/2006websit...del.specs.html I know they have both heating and cooling models.
    Lagoon shape, 23,600 Gal, steel walls by International Swimming Pools, "ultra-seam" liner by Latham, Pentair 011018 IntelliFlo 3HP Variable Speed Pump, PentAir CCP420 filter, Heat Siphon Z575HP, PentAir IC40 SWG, 2 LED Lights (Pentair Intellibrite 5G, 110V). 4 x 1.5’’return lines, 2 x 2’’skimmer lines, 1.5’’ waterfall line. All plumbing is "TigerFlex" pipe, all lines plumbed individually. Deck: travertine glued over concrete.

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