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  1. #1
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    Default New building - what geyser options

    I am converting a garage to a flatlet and the guy that's doing my plans has indicated i need an "energy saving" geyser.

    What is your advice:
    - Solar geyser?
    - Heat pump system?
    - this new "waterwise" system?

    The water doesn't have to get very hot.. 40' should be ok..

  2. #2
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    Default Re: New building - what geyser options

    Hi, it depends what you want to achieve / prevent:

    1. Counter load shedding with some cost saving?
    2. Save costs?


    For point number: 1. Gas Geyser

    2. Solar Geyser
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  4. #3
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    Default Re: New building - what geyser options

    I faced the same issue, ended up going the normal geyser route. I reasoned that the tenant was going to pay for the electricity anyway. I did set-up a separate meter (so they basically pay their own electricity – I get refunded whenever they buy electricity). However I did fit a “Geyser-wise” (limited the heat to about 50-55 degrees).
    Good luck with your decision
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  6. #4
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    Default Re: New building - what geyser options

    Who will live there, do you intend renting it out?

    If you will be renting it out and you look at gas then you must just be sure to make the gas refills for the cost of the tenant, otherwise they will kill you. If going gas you can even put in a gas hob for cooking, but again remember gas for the tenants account.

    Solar is also a option but if you'll be renting the place, remember either gas or solar will cost you much more to install than a normal electric geyser, so then you have to ask yourself whether you'll be able to recoup that money by asking more rent per month.

    A EV tube solar geyser can work great, a single person in a small flat having one bath / shower per day and washing dishes should be able to run on the sun only during summer time with no need for switching on the electrical backup element.

    Your least expensive option and the one I'll personally lean towards if renting the place is a class B energy rated electrical geyser with a Geyserwise timer. Least up front cost, least complicated and the tenant will anyway pay for the electricity. You can simply show them how the Geyserwise works and set it up for them to heat once or twice per day depending on their preference.
    "The man who does not read has no advantage over the man who cannot read" - Not Mark Twain

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  8. #5
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    Default Re: New building - what geyser options

    Daar is min goed so goedkoop soos 'n doodgewone ou donkie as geyser
    Cheers
    Willem Greyling

    Frikkie is my pel en ek erken dit...
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  9. #6
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    Default Re: New building - what geyser options

    Not renting out, it's for our adult kids when they stay..

  10. #7
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    Default Re: New building - what geyser options

    Hello

    100 or 150 liter normal geyser with a geyserwise unit!

    I have a 250 liter solar geyser in my house. it works okish in summer, but to heat that thing in winter kills your electrical bill. I have considered changing to a smaller normal geyser, just a bit of an unnecessary expense and all the houses in the complex came with the solar units fitted.

    Cheers

  11. #8
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    Default Re: New building - what geyser options

    Quote Originally Posted by ralton View Post
    Not renting out, it's for our adult kids when they stay..
    if it is not used daily, then go gas
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  13. #9
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    Default Re: New building - what geyser options

    Quote Originally Posted by Kamakazi View Post
    if it is not used daily, then go gas

    Agree with this, for occasional use go gas, costs you nothing if nobody is living there, also very low, almost no maintenance cost.
    Solar geysers have maintenance cost whether you use them or not, heat pumps also have annual maintenance cost.

    If you don't want to spend the initial amount for installing a gas geyser then electric with Geyserwise will still work just fine, you just entirely switch off the Geyser when not in use.
    "The man who does not read has no advantage over the man who cannot read" - Not Mark Twain

  14. #10
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    Default Re: New building - what geyser options

    Quote Originally Posted by Kamakazi View Post
    if it is not used daily, then go gas
    When you know when your kids are coming to stay over you can switch the geyser on and off when they leave.

    This will also not use any power when not needed. Elec geyser just needs 2 hours to heat up from cold.
    Last edited by ekkekan; 2021/10/12 at 08:11 PM.

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  16. #11
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    Default Re: New building - what geyser options

    Gas.

    2 Weeks ago I installed a gas geyser as a test for a client who monitors his energy usage very closely. As a norm the house would consume between 36 and 40 unit of electricity per day.

    Since the gas geyser they are down to around 12 units per day - It totally convinced me to install a gas geyser in my own house!
    I have met some crazy people. They have made me their leader...

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  18. #12
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    Default Re: New building - what geyser options

    We had a gas geyser in our previous house. One that heated a drum of water. Used to go through two (I think) 45kg cylinders every three months. We have an on demand gas heater now. Set to 50degrees. With a gas stove we probably use about two a year now.

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  20. #13
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    Default Re: New building - what geyser options

    Just be mindful of the risk of pathogens when the temperature is set too low.
    Legionella thrives at temperatures below 50C.

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  22. #14
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    Default Re: New building - what geyser options

    Quote Originally Posted by SAND View Post
    Just be mindful of the risk of pathogens when the temperature is set too low.
    Legionella thrives at temperatures below 50C.
    Are there any cases of this disease in SA?

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  24. #15
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    Default Re: New building - what geyser options

    Quote Originally Posted by MANDREAS View Post
    Daar is min goed so goedkoop soos 'n doodgewone ou donkie as geyser
    Ai toggie. Julle Suidwesters verstaaaan nie. Ons Stateside ouens het nie tyd in die oggend om 10 myl te loop en hout maak nie.

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  26. #16
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    Default Re: New building - what geyser options

    Quote Originally Posted by Richard Mackay View Post
    Are there any cases of this disease in SA?
    I have often wondered about this myself. I think a prominent political leader died from legionnaires a few years back but Ive never heard of a case.

  27. #17
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    Default Re: New building - what geyser options

    Quote Originally Posted by ralton View Post
    I am converting a garage to a flatlet and the guy that's doing my plans has indicated i need an "energy saving" geyser.

    What is your advice:
    - Solar geyser?
    - Heat pump system?
    - this new "waterwise" system?

    The water doesn't have to get very hot.. 40' should be ok..
    This is a personal experience.
    1) A solar geyser is NOT worth the money spent. I installed one at my house, and 8 years down the road, we have not even recouped a quarter of the money spent on the initial cost.
    The water is hot during the day, but cools down rapidly at night. So you need an electrical back up - which puts you back at square 1.
    No sun - No hot water.
    Stay away from Solar Beam. This company are crooks.

    2) A heat exchanger uses electricity to heat the water which still goes into the geyser.
    But it uses half the electricity to heat the water as a normal geyser does.
    I installed a heat exchanger/ heat pump 5 years ago for a client, and it is working perfectly. But it cost 22 grand.

    3) Gas geyser.
    I am having a gas geyser installed at my house this week, after getting various opinions and advice from forum members, and a "house call" from "Plunger" to give me expert advice as well. Thank you Plunger.
    Gas is cost effective. Dewhot gas geysers are locally manufactured. Come with a guarantee, and well priced.
    The main benefit of gas, is that it is hot water on demand.
    No constantly heating the stored water when not in use.

    As the owner of the flatlet, you want your tenant to use as little water & electricity as possible.
    Kitchen sink, hand basin, shower & toilet.
    LED lights
    Radiant shield underlay underneath the roof tiles/ sheeting
    Lots of natural light - big windows.
    I met some crazy people.... They made me their leader.

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  29. #18
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    Default Re: New building - what geyser options

    Quote Originally Posted by ralton View Post
    I am converting a garage to a flatlet and the guy that's doing my plans has indicated i need an "energy saving" geyser.

    What is your advice:
    - Solar geyser?
    - Heat pump system?
    - this new "waterwise" system?

    The water doesn't have to get very hot.. 40' should be ok..
    What is waterwise system. ? There is no difference between solar geysers or heatpump geysers except for the bolt hole orientation. Solar geysers cater for brackets on roofs but if its in a cradle you can make a plan. I dont know if a solar geyser is much more expensive than a b rated geyser as I seldom fit solar geysers but they are almost exactly the same geyser. I would just bang in a 150l geyser if there are not more than three grown ups involved and if you can put the geyser outside ,even better. P E doesnt get that cold.

  30. #19
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    Default Re: New building - what geyser options

    Quote Originally Posted by RoelfleRoux View Post
    Ai toggie. Julle Suidwesters verstaaaan nie. Ons Stateside ouens het nie tyd in die oggend om 10 myl te loop en hout maak nie.
    Ons moet seker iets doen om al die bier en skaapvet af te werk, anders raak ons net so vet soos die Suid-Afrikaners
    Cheers
    Willem Greyling

    Frikkie is my pel en ek erken dit...
    Ja die mense se ou Frikkie is 'n tappet...
    Tune tune baboon

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  32. #20
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    Default Re: New building - what geyser options

    Quote Originally Posted by thabogrobler View Post
    Gas.

    2 Weeks ago I installed a gas geyser as a test for a client who monitors his energy usage very closely. As a norm the house would consume between 36 and 40 unit of electricity per day.

    Since the gas geyser they are down to around 12 units per day - It totally convinced me to install a gas geyser in my own house!
    Interesting to see some households can use 28 units of power just for heating water. This is a massive saving.
    I wonder what the gas consumption would be on this installation.....

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