The Humble Geyser blanket – what you need to know.
As the colder seasons and the annual ESKOM price increase start to set in, more people will start to look at ways to save electricity and money through winter.
From using gas heaters to solar , people often look ‘out there’ ,but the first look should actually be inside the home and more specifically – inside the roof.
Yes, your geyser. Typically, a geyser can account for between 40% and 60% of the total monthly electricity usage and in winter, this will increase due to standing heat loss.
It works a bit like a cup of tea.
You boil the kettle and the water comes out at 96°C into your cup. The water infuses the tea bag and that warm homely colour starts to settle into the cup.
The second that water comes out of the kettle, it’s starting to cool down as the colder air around it draws the heat out of the water.
This is all due to a process of natural thermodynamics where heat flows from hot to cold.
In the 5 minutes it takes to make that cup of tea, the water could lose 10° in temperature just to the air around it.
If you left that tea out for 10-15 minutes, it would go from hot, to warm and then to luke warm and then to cold.
The you’d have to re-heat it back to 96° all over again and that would waste electricity wouldn’t it?
Rather just put a tea cosy on and keep it warm for much longer.
Now, consider the surface area of the tea cup itself- not very big is it?
Now , multiply the size of that surface area 100 times – and think about a tea cup as big as your geyser and how much heat it would lose if left out in the cold and yet, most people do this every day.
Your geyser is nothing but a big Kettle.
A kettle has a tank that you put water into and an element that heats the water as does your geyser. The main difference here is that a geyser has a thermostat which is a ‘temperature’ gauge that measures when the water reaches the geyser set point.
For example, if you geyser is set to 60°C, as soon as the element has heated the water to that temperature, the thermostat switches the element off or it would simply keep heating up and boil the water – then your geyser would explode and that would NOT be fun.
So , the thermostat acts like a temperature policeman and switches the geyser element off once the water reaches the set temperature.
But, here comes the tea cup scenario again. As soon as the water reaches temperature, it already starts to cool down as the steel tank of the geyser is a GREAT conductor of heat and the surrounding air is MUCH colder than the water inside the geyser.
So, the water starts to lose temperature as the colder air ‘ sucks’ the heat away from the tank. Then the water in the geyser starts to cool down and that’s when the ‘geyser policeman’ – the thermostat- jumps into action again. It switches on the element to re-heat the water back to the required set temperature and no sooner has it done that, then the water starts losing heat again…and so it goes on and on…and on.
Wouldn’t it be better to just put a cosy on it, like the tea cup.
Well, that’s what a geyser blanket is – it’s a cosy for your geyser and it’s only purpose is to keep that water hotter for longer by insulating the geyser against the colder air around it. Much the same way you wrap a blanket around yourself when it’s cold.
The geyser blanket – it saves money by keeping the water hotter for longer.
Simply put , the longer that water stays hot, the less electricity you use and , when the geyser does switch on, it uses LESS electricity and stays on for less time to reheat the water.
A geyser blanket alone can save around 8%-10% on your electricity bill simply by INSULATING your geyser against the cold and especially the VERY cold as we see in winter.
As you can see from the thermal image taken of a geyser with and without a blanket, the one without is losing heat to the air, while the one keeping cosy with the blanket is not.
But, a geyser blanket alone is a bit like diet without exercise- yes, you will lose weight but much slower than you would with exercise!
Enter the geyser timer!
By controlling the geyser to NOT switch on when hot water is NOT needed and combining that with the INSULATION provided by the blanket, the electricity saving JUMP considerably from 10% to 28%!
By coordinating the geyser to provide hot water ONLY when it’s needed and not having it switch on unnecessarily throughout the day and night , a home with one geyser can reduce their electricity costs by up to 40%!
At Saving Energy , we have done more than 2000 timers and blankets and have become quite good at it really..Even better is that we are GIVING AWAY a free geyser blanket with every geyser timer installed in Gauteng before 31 May 2017.
Why are we doing this?
We want to help the residents of Gauteng prepare for Winter now so that when the real cold weather hits, they are already in Energy Saving mode and can enjoy hot water through winter and save a LOAD of money and electricity as well!
Plus, we help Gauteng take pressure off the grid but not having your geyser on during peak demand time but still ensuring you have HOT water.
For ust R1490-00 excl VAT you will get a geyser timer supplied and installed and setup to your water usage patters PLUS a free geyser blanket supplied and installed – you save R430-00!
THIS OFFER IS ONLY VALID UNTIL 31 MAY 2017- so , don’t wait book now.