Installing a geyser timer

Geoff.D said:
More useful info:

(1) Have a look at this site: https://www.savingenergy.org.za/
(2) Look at these calculation tools on the above site: https://www.savingenergy.org.za/asl/calculation-tools/
(3) Understand the new energy labels for all appliances sold in SA.
(4) Have a look at these compulsory specs when buying appliances: https://www.savingenergy.org.za/asl/manufacturers-and-importers/
(5) SANS 151 covers geysers: The minimum rating for a geyser is now ("B"). Unfortunately, many of us are sitting with geysers in our homes that will battle to meet the "D" rating. -- These geysers all benefit from the installation of a geyser blanket.
(6) And for the really interested in water heaters, here is a thesis done on the subject! Fascinating stuff!
https://scholar.sun.ac.za/bitstream/handle/10019.1/.../reid_thermal_2016.pdf?...2...



See attached document
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Thanks a lot for your explanations and referenced literature, it gives a detailed insight
into the inside workings of geysers. :thumbsup:
 
So I bought one of these CBI timers in the interim. The Geyserwise guys were quite slow in giving me all the info.

It was only R280.00... But I hear they break often! And I won't know until have I have no hot water...

IMG_20190427_121418.jpeg
 
Steamy Tom said:
fitchef is so expensive O_O are you single im guessing?
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Yup.

Works out to about R58 a meal (I think the vegitarian ones at cheaper).

But it's convenient for me (I'm out the house from 7am to 7pm often)... Then at least it's healthy (no sugar, colorants, preservatives etc)

Plus, I used to order so many take outs at R80 to R100... This feels cheap in comparison!
 
Dolby said:
Yup.

Works out to about R58 a meal (I think the vegitarian ones at cheaper).

But it's convenient for me (I'm out the house from 7am to 7pm often)... Then at least it's healthy (no sugar, colorants, preservatives etc)

Plus, I used to order so many take outs at R80 to R100... This feels cheap in comparison!
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fair enough. do you live in an actual house by yourself?
 
Dolby said:
So I bought one of these CBI timers in the interim. The Geyserwise guys were quite slow in giving me all the info.

It was only R280.00... But I hear they break often! And I won't know until have I have no hot water...

View attachment 650670
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Have you seen any difference since installing the timer?
 
Dolby said:
It's not 100% accurate and tested in a lab environment - but it's real consumption observed. And to me, it makes sense that the more higher differential, the more power/energy needed to get it back to the 60 degree. I bet that in the first case, even the 3kWh geyer is running at 1kWh (more frequently, as it needs to go from 45 > 60).

The same 3kWh geyser is using the full 3kWh in the last example to go from 20 > 60.

As you say, certain conditions - I'm single (ie only one shower at the same time) ... If you have a family with kids showering 6am ... you at 8am ... and wife at 9am - then yea, it won't work.

Blur arrow is when the thermostat kicks in :


View attachment 648080
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Are you implying that at the end of the day the total energy used to heat up the water body in all scenarios will be the same?
 
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