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Thread: Gas vs Electric for Hot Water

  1. #1
    270 King of the Calibres oraki's Avatar
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    Gas vs Electric for Hot Water

    Anyone done the figures comparing the 2. 300l cylinder decided to fail today, so looking at changing.
    First one lasted 8yrs, this one 9. Apparently it's because of our hard water. Elements last about 5 yrs, although the last one didn't see 1 yrs service.
    Have heard that gas systems don't like hard water.
    Thoughts???
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  2. #2
    Member Bonecrusher's Avatar
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    Put a filter on your water supply cheaper to change than HWC
    rewa likes this.

  3. #3
    Member GravelBen's Avatar
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    Asked a plumber mate about it when I had a cylinder start leaking a few years ago. He reckoned if you're a low user or a high user gas is worthwhile, if you're in the middle then electric is still cheaper.

  4. #4
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    love my gas hot water on demand
    Maca49 likes this.

  5. #5
    Caretaker jakewire's Avatar
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    Just replaced my gas unit after 14 years.
    Was alot cheaper when we put it in however with only two of us now it is quite economic for us to run
    We have a fire as well but no wet back
    Quis custodiet ipsos custodes?

  6. #6
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    Quote Originally Posted by Bonecrusher View Post
    Put a filter on your water supply cheaper to change than HWC
    The filtration systems needed to change hard water are expensive, you can’t just throw in a grit filter and she’ll be right.
    More meplat, more better.

  7. #7
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    When you say gas do you mean an instantaneous hot water heater or a gas cylinder? Both have there pros and cons, are you on NG or LPG?

  8. #8
    Member gadgetman's Avatar
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    Quote Originally Posted by Garilla View Post
    When you say gas do you mean an instantaneous hot water heater or a gas cylinder? Both have there pros and cons, are you on NG or LPG?
    Being the mainland it will be LPG.
    There are only three types of people in this world. Those that can count, and those that can't!

  9. #9
    Member Ryan_Songhurst's Avatar
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    Gas is awesome and with two of us (one of us has hour long showers... and its not me) it seems cheaper
    #27GANG

  10. #10
    270 King of the Calibres oraki's Avatar
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    Don't want to filter water if I can get away with it. Last house was full of iron and manganese, and it was an absolute pain in the arse.
    5 showers/baths a day, so can use abit of water, but will probably just suck it up and replace with a super heavy duty fecker.
    I think there'll be bugger all in it overall.
    Be good to have endless hot water tho....
    Farmers Feed The World..
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  11. #11
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    Gas instantaneous all day, every day and twice on Sunday.

  12. #12
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    see if anyone makes stainless ones .we used to make them at the heating outfit out of stainless for boiler systems and for wet back systems.

  13. #13
    Member gadgetman's Avatar
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    Sounds like you just about want a shower tray installed underneath and and pipe to direct outside for next time. Ours is still the original from when the place was built, about the same time I was built, ... 21 and a bit years ago.
    There are only three types of people in this world. Those that can count, and those that can't!

  14. #14
    Member Marty Henry's Avatar
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    If the waters hard ie calcium bicarbonate it will stuff up a heat on demand gas pretty quick as the heat exchanger piping will clag up with lime. A std gas will be better but with hard water when you heat it the soluble calcium bicarb turns to carbonate and that sets on the hot surface. How long do kettles last?
    Moa Hunter and rewa like this.

  15. #15
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    Stainless might not be the way to go, I know Rinnai won’t gaurantee there stainless cylinder if they class your area as having harsh water. We have so called harsh water on the Kapiti Coast, stainless cylinders don’t last much longer than normal cylinders. Best contacting the manufacturer to see if they will garentee a stainless cylinder for your area/water quality.

 

 

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