Hi All

Some advice/explanation to my experience please..

So about 6 weeks ago, i had a 20L gas geyser installed at my home to replace my electric geyser..

Works great, but the gas consumption is confusing me. After installation i attached a 9kg cylinder to it, and it lasted me just over 4 days (usage based on weight is 2kg per day, with 4 adults in the home, and 2 showers per day each).After the 9kg was finished,  i attached a 48kg cylinder to it, its now 35 days and counting since doing this and its still working. Based on the usage of 2kg's per day that i got of the 9kg, a 48kg cylinder should only last approx 24 days.

P.S. nothing has changed in our usage pattern..

can someone explain why?

Thanks

Iiceman

 

I don't know. I have an 18-liter on the main house and I get maybe 6 weeks out of a 48kg, but the one 9kg I used one time lasted almost 2 weeks, which comes out to 10 weeks if I extrapolate it forward. The reverse result of what you got...

My only conclusion is that usage pattern might be more variable than you and I think. You think there's been no change, but maybe there was. Even slightly cooler weather could lead to showers that are 1 minute longer, and that will add up quickly.

I plan on installing some kind of load-cell and-or pressure sensor at some point so I can track it, but more importantly, get a warning when it is about to run out. I have the silly situation that the gas feeds both my geyser and the stove. The stove can run that bottle right down to nothing, but the gas geyser begins to give up (goes into a cyclic tick-tick-tick-ignite, die, repeat) long before that. Always does it in the middle of the wife's shower. Well once it did give up in one of my showers, but that doesn't count... cause I can't yell at myself 😛

So then for a few days we run on the old bottle during the day (or the stove) and switch to the new bottle tonight. So I'm also considering just splitting the system. Separate bottles for cooking and water.

I'm also considering going back to a solar/electric setup. Despite what people say about Eskom, it's just more reliable than my own ability to track how much gas I have out back 🙂

 

Edited June 1, 20206 yr by plonkster

im also baffled by this, i did read somewhere that a bigger cylinder has more pressure, than a small cylinder hence the better efficiency, however im not sure, seems that way...

In terms of usage, actually over the last 2 weeks its been colder, which should count to the inverse of what im seeing..

to monitor you gas cylinders there is a device made by yonkegas that apparently is quite accurate (according to the guy at the gas store), but is quite expensive.

I was thinking more of something like this, and this, and maybe a Sonoff or something easy that has WiFi already. I see the YonkyGas unit works out a tad under R1k, which in my opinion is not bad. I'm about a third of the way there (before shipping) and still have to write the code for my DIY setup...

What I don't like about the Yonkegas sensor is that it appears you put it below the bottle, and the bottle needs rubber feet. The sensor and the feet then has to be transferred every time you swap a bottle. I'd need two sensors for the two bottles, so the wife doesn't have to swap sensors if she swaps a bottle (which can be done by flipping a valve at this point).

I would much prefer something that just sits below the bottle, a scale in other words, that's simply permanently installed inside the cage. Either that, or a pressure sensor like this one, but electronic.

3 hours ago, Iiceman said:

In terms of usage, actually over the last 2 weeks its been colder, which should count to the inverse of what im seeing..

I spend less time under a shower in cooler weather...then again I also close the water in between soaping/rinsing etc...

Hi has any 1 resolved this issue I’m using a 19 kg on a 16l gas geyser only last me 2 Weeks please let me no how to fix installers was twice here n can’t find the fault or they don’t no wot they doing please help

12 hours ago, Ryanb123 said:

Hi has any 1 resolved this issue I’m using a 19 kg on a 16l gas geyser only last me 2 Weeks please let me no how to fix installers was twice here n can’t find the fault or they don’t no wot they doing please help

I also have a 16l geyser for a couple of years already, I also experience the same fluctuating gas usage. 48kg last 5 weeks, 19kg last 3 weeks and 9kg last 2 weeks, it depends on environmental factors alot, but in general the ratio between the cylinders remain the same, in summer you can add a week for every size cylinders lifespan. based on this usage patterns that I have observed over a couple of years, I only use 9kg cylinders on my gas geyser and stove as they are the most economical in my case.

12 hours ago, Ryanb123 said:

Hi has any 1 resolved this issue I’m using a 19 kg on a 16l gas geyser only last me 2 Weeks please let me no how to fix installers was twice here n can’t find the fault or they don’t no wot they doing please help

Hi Ryan,

I have a 12L Dewhot geyser, and a 19kg lasts about 6 weeks.  The gas geyser only supplies the bathroom, and the distance to the bathroom from the geyser is probably a meter.  I had a leak in one of the gas pipes at one stage and lost a whole bottle within two weeks...  Seems to me you might have a leak somewhere.  Just a side note.  Make sure that you have the correct  size regulator attached.  Might also cause problems

Hi

Will definitely look at the regulator the team is coming out tomorrow lets hope they can resolve this issue but lots of negative news about Dewhot geyser .fitted everything in may month love how it saves me money but all the money that I save n more going for gas cylinders my geyser only for shower 4 ppl 1 shower n day 

On 2020/06/01 at 9:34 AM, ___ said:

I don't know. I have an 18-liter on the main house and I get maybe 6 weeks out of a 48kg, but the one 9kg I used one time lasted almost 2 weeks, which comes out to 10 weeks if I extrapolate it forward. The reverse result of what you got...

My only conclusion is that usage pattern might be more variable than you and I think. You think there's been no change, but maybe there was. Even slightly cooler weather could lead to showers that are 1 minute longer, and that will add up quickly.

I plan on installing some kind of load-cell and-or pressure sensor at some point so I can track it, but more importantly, get a warning when it is about to run out. I have the silly situation that the gas feeds both my geyser and the stove. The stove can run that bottle right down to nothing, but the gas geyser begins to give up (goes into a cyclic tick-tick-tick-ignite, die, repeat) long before that. Always does it in the middle of the wife's shower. Well once it did give up in one of my showers, but that doesn't count... cause I can't yell at myself 😛

So then for a few days we run on the old bottle during the day (or the stove) and switch to the new bottle tonight. So I'm also considering just splitting the system. Separate bottles for cooking and water.

I'm also considering going back to a solar/electric setup. Despite what people say about Eskom, it's just more reliable than my own ability to track how much gas I have out back 🙂

 

Where I am, the gas fillers are fiddling with the gas weights... and pilfering gas. If you have a scale, also try measuring the actual weight of your gas cylinder, yes apart from the consumption🤣😀

I’m surprised how little there is currently on the internet regarding how long gas cylinders should last on a gas geyser. So I felt I should add my two cents.

We installed the 20L/min Paloma gas geyser with a 48kg gas cylinder on 12 February. It is now 1 June and it’s still going. I’m hoping for another two more weeks tops which will total 4 months exactly. For now, it’s at least 0.02kg/hr.

It’s a small household of two people where we average two showers a day. Maybe once a week a bath is run instead of a shower. Occasionally we have an overnight visitor or two.  Hot water is opened as usual in the kitchen a few times a day for a minute at most. Once a week hot water is used more extensively for cleaning and filling buckets etc. Our hot water appliances heat their own water (dishwasher, washing machine).
We do have to wait a good twenty seconds or so for taps to heat up every time we open the hot tap! 
My guess is that we probably run the hot taps on an average day around 10-12min per day in total. That probably goes up to 15-20min on cleaning day.
 

Maybe this information would help someone in a similar context.

 

Hi, Please assist, I've just used 19kg with 16L Dewhot Gas geyser in 28days, I shower once a day approximately 7min. The gas is only used for the geyser, surely this usage can't be right? 

We have a 20L/min Paloma gas geyser that is connected in series to our electric geyser. It only turns on if the temp of the incoming water (output from electric geyser) is below 55 degrees. I run the electric geyser during the day if there is sufficient solar otherwise it stays off. We have roughly 2 baths and 1 shower a day plus the stove and oven run off gas and are used daily. This is how long a 48kg cylinder lasts.

19 hours ago, Sarah said:

Hi, Please assist, I've just used 19kg with 16L Dewhot Gas geyser in 28days, I shower once a day approximately 7min. The gas is only used for the geyser, surely this usage can't be right? 

At the 7min per day you should have used about 12kg. Thus you used 60% more than calculated. One of the earlier posts indicating only 20g per hour is way out. For a 16-20l/min it should be around 48g/min so 20g/h is just too low. Not even a small gas cooker can use so little gas on a small flame. 

Statements based on manufacturer figures. 

@slipx thanks for your great graph. 

Edited August 16, 20241 yr by Scorp007

On 2024/08/15 at 5:15 PM, Sarah said:

Hi, Please assist, I've just used 19kg with 16L Dewhot Gas geyser in 28days, I shower once a day approximately 7min. The gas is only used for the geyser, surely this usage can't be right? 

That's definitely not right. We are 3 adults in our house, we shower once a day every, between 8 to 12 minutes per shower, plus our kitchen basin, add another 6 minutes per day for the kitchen, so that approximately 30 to 35 minutes per day. Our 9 kg (nine kg), lasts 3 weeks on average. 

On 2024/08/16 at 12:59 AM, slipx said:

We have a 20L/min Paloma gas geyser that is connected in series to our electric geyser. It only turns on if the temp of the incoming water (output from electric geyser) is below 55 degrees. I run the electric geyser during the day if there is sufficient solar otherwise it stays off. We have roughly 2 baths and 1 shower a day plus the stove and oven run off gas and are used daily. This is how long a 48kg cylinder lasts.

I am very keen to install our gas geyzer in series with our electric one as this is heated by a solar panel during the day. Is it complicated to do so?

15 hours ago, JacquiP said:

I am very keen to install our gas geyzer in series with our electric one as this is heated by a solar panel during the day. Is it complicated to do so?

Not really. The plumbers did it when they installed the gas geyser. You just need to install a bypass value to isolate the gas geyser if ever needed 

What I will say, and it's mentioned higher up this thread, is that our routines are not as fixed as we think they are.

I was in the UK in June, but I've been keeping an eye on their watery affairs since I did some research on how much water people use per day (another story for another time, perhaps). So this holiday I was really paying attention to such things and noticed, for example, waterless urinals at a venue we went to in London, and a "twinned" toilet at a museum in Winchester.

Anyway, the company that makes the waterless urinals sells a number of products that are designed to reduce water usage. One of these is a simple timer that is triggered when the water starts running. Some councils give these away to home owners. They are very keen that people there should shower rather than bath, and if they shower then they should run the water for no more than 4 minutes (they can't enforce this, but they do encourage it). 

Long story short: Most people have no idea how long they spend in the shower. They'll tell you oh yes, it's four minutes, probably less actually. Then you give them the timer and their water bill starts dropping. 

Interestingly the company did a number of studies, particularly at places with shared shower facilities (EG gyms). They found that even if they put the timer in but blanked out the display then average shower time dropped off. As soon as people know their use is being metered they start cutting down.

Of course you get the best result by having a running display or some sort of alarm.

Edited October 6, 20241 yr by Bobster.
gramma and spelllin

We had a 20Litre Gas Geyser installed. 4 adults using it for showers once a day, approx 5 min, our 9 kg bottle only lasts 4 days🙈 What could the problem be?

Hi all,

Have a similar issue. Not sure if any of you have resolved this geyser issue. I have a 16L dewhot geyser. I have a 48kg bottle supplying my stove and one bathroom (shower and basin).

We are 3 people, showering twice a day (avg 10min each). Gas bottle usage is variable. 1st time 48kg lasted 5 weeks, 2nd bottle lasted 3 weeks, third 48kg lasted 18 days.

We have so far installed a water pressure valve as the municipal supply pressure was too high (around 800kPa) to reduce the pressure to 450kPa, 48kg lasted 3 weeks. We also them changed the gas regulator, now 48 kg lasted 18 days.

We also seem to notice that the water gets extremely boiling hot when you open the tap, then adjusts to setting temp, and after about 2mins, water is cold. This seems to happen when the 48kg gas bottle is less then half full.

Now the water temp does not go higher than 37C, with setpoint at 55C.

This is not ideal. Can anyone help? When gas bottle is low, generally get a E7 error code. This high gas usage and unreliable dewhot is not ideal.

On 2024/10/05 at 9:16 PM, JacquiP said:

I am very keen to install our gas geyzer in series with our electric one as this is heated by a solar panel during the day. Is it complicated to do so?

Not at all you set your electric geyser to max temperature and make sure it switches off when drawing from the grid.

Take hot water outlet from electric geyser and feed that through a temping valve set at 55 and then into cold water inlet of gas geyser that way with an intelligent gas geyser it only has to heat it by 5 degrees obviously once the water in electric geyser drops below 55 the gas geyser works a little harder however it will save a lot as chances are you will never be heating water from ice cold.