
Heat Pump Water Heating
- SAVE UP 68% ON YOUR HOT WATER ACCOUNT
- ESKOM REBATE
- HOW DOES A HEAT PUMP WORK?
- EVEN WHEN THE SUN DISAPPEARS
- THREE DIFFERENT HEAT PUMPS
- YOUR SAVINGS EXPLAINED
- MANUFACTURER WARRANTY
- CERTIFIED AND REGISTERED
- THINGS YOU SHOULD KNOW
- HOW TO GET YOUR HEAT PUMP
- HEAT PUMP VS SOLAR.
SAVE UP 68% ON YOUR HOT WATER ACCOUNT
"Houses that install Heat Pump Water Heaters can realise savings of up to 68% on their hot water bill." (Plumbing Africa, Monday 23rd May 2011)
A Heat Pump Water Heater offers you a way to use electricity to heat water efficiently. Where a normal household geyser uses three units of electrical energy to produce three units of heat energy, a Heat Pump Water Heater converts just one unit of electrical energy into three units of heat energy—hence a saving of 68%.
Heat Pump Water Heaters are eco-friendly super efficient water heaters with super electricity savings and Eskom Rebates . Not only does the Heat Pump Water Heater give you significant savings on your electricity account, it is also specifically designed for South African conditions.
Since the installation is also neat and compact , you'll enjoy a product that produces a continuous flow of hot water, at a fraction of the cost of a normal geyser and is aesthetically pleasing.
ESKOM REBATE
Under Pressure Plumbing understands how frustrating it can be for customers to apply for and wait for their Eskom Rebate.
Normally, the application for the rebate would be made to Eskom once the installation is finalized. The turnaround time for the receipt of the rebate is approximately 8 months.
As a service to our customers we have undertaken to offer you the full Eskom rebate upfront. The rebate will reflect as a credit on your invoice and we will then follow the necessary procedure with Eskom and await their rebate ourselves.
All we require from you, the customer, is to complete and supply all the necessary documentation required by Eskom. The following are required:
- Copy of ID
- Copy of Proof of Address
- Copy of Electricity Bill or prepaid electricity box number (with 3-6 months proof of electricity purchase)
- Signed customer declaration
- Signed confirmation of half yearly minor service schedule.
| Heat pump tank size | Rebate is offered as follows: |
| 301 – 500 litres | R 4,320 |
| 100 – 300 litres | R 3,668 |
HEAT PUMP WATER HEATERS MUST BE INSTALLED BY A CERTIFIED AND REGISTERED PLUMBER IN ORDER TO QUALIFY FOR THE ESKOM REBATE
Eskom's criteria to qualify for the rebate is that the Heat Pump Water Heater must be installed by a certified Plumber and Registered Heat Pump Installer. In addition all current geyser installations must be brought up to SABS Approval Standards.
HOW DOES A HEAT PUMP WORK?
A Heat Pump Water Heater works by absorbing heat energy from the air and then using it to heat the water in your geyser.
Consider your refrigerator. A refrigerator moves heat from inside the fridge to the outside - keeping the inside cold. A heat pump water heater uses the same principle but in reverse. It transfers heat from outside air into a water storage tank.
The current geyser used in most South African households, requires electricity to repeatedly heat the water in the geyser throughout the day. This constant reheating is what results in your geyser accounting for the major portion of your electricity account.
Heat Pump Water Heaters conversely only uses electrical energy to ‘move' the heat - they don't actually ‘make' heat and will only operate when required to replenish the storage of hot water in the cylinder.
This results in you having constant access to water heated to between 40 – 60 degrees but at a fraction of the electricity costs.

EVEN WHEN THE SUN DISAPPEARS
Heat Pump Water Heater is an efficient means of heating water. The exact “efficiency” depends on something called the “co-efficient of performance” (COP). The COP is used to describe the ratio of useful heat movement to work input. The Heat Pump Water Heater consumes 1KW of electricity and between 2 and 4 COP. Therefore the higher the COP, the better the efficiency of the heat pump.
As the ambient temperatures changes, the heating output of a heat pump will vary. The outside air gets heated up by energy from the sun all year round. So even when the sun is not shining brightly, or it is the middle of winter, there is still solar heat energy in the air that is available for use. Therefore, even when temperatures are cooler the heat pump continues to transfer heat between air and water.
Heat Pump Water Heaters are therefore well suited to heating water using the outside air as a heat source in our South African climate as they only start to become less effective at temperatures of below -5 Celsius.
THREE DIFFERENT HEAT PUMPS
There are 3 types of heat pump systems namely:
|
1. The Integrated Heat Pump Water Heater
|
![]() |
|
2. The Split Type or Retrofit Heat Pump Water Heater
|
![]() |
|
3. The Commercial Heat Pump Water Heater
|
![]() |
THE HEAT PUMP WATER HEATER CAN BE USED FOR MORE THAN JUST ENJOYING A HOT SHOWER
Some heat pump water heating systems can also give you ‘central heating'. They do this by pumping warm water from the hot water tank around a system of under-floor heating pipes.
Some other systems can be used to heat a hot tub, spa or swimming pool more cheaply than using an electric heater.
YOUR SAVINGS EXPLAINED
It is estimated that a normal geyser accounts for between 40% and 60% of a typical household's electricity costs. Averaged out at 45% of a total electricity bill of R900 per month, this means you could be spending over R400 per month or more than R4 800 per year on water heating.
Illustration:
| ITEM | % of Hot Water Costs | Based on a Monthly Electricity Bill of: | Cost of Hot Water Consumption Per Month | Per Annum Hot water consumption of Electricity Bill |
| GEYSER | 45% | R 900 | R 405 | R 4 860 |
| WATER HEATER | 14% | R 900 | R 126 | R 1 512 |
| SAVINGS | R 279 | R 3 348 |
With our Heat pump you will be cutting this cost by up to two thirds, you could be saving well over R3000 per year.
Depending on the amount of hot water used and the size of the Heat Pump Water Heater , the system can pay for itself within two to four years.
And thanks to Eskom's new rebate on Heat Pump Water Heaters, payback time could be even less!
MANUFACTURER WARRANTY
The manufacturer requires that their Terms and Conditions are adhered to in order for the Warranty to be effective. Their T&C's are as follows:
- A 6 months post installation service is required as per the Warranty. Thereafter an annual service is needed.
- The Warranty Term commences on the date of the customers invoice.
- The Warranty is limited to the original owner and is not transferable.
- Heat Pump units that are privately installed will not qualify for the Warranty.
- For the Warranty to take effect, payment must have been received in full by Under Pressure Plumbing, and a faxed copy of the Warranty Certificate must have been received by the Supplier for registration purposes.
- The unit needs to be certified by a qualified electrician on date of installation (non-negotiable).
- T&C's apply (e.g. sediment, rust, etc)
CERTIFIED AND REGISTERED
What sets Under Pressure Plumbers apart from the market is the following:
- Our plumbers are Registered Plumbers and Certified Heat Pump Installer's
- Under Pressure Plumbing is a Supplier Approved Installer
- We are Eskom Accredited for Heat Pump Water Heater Rebates
- We pass the Eskom Rebate onto our customers upon invoice
- Solid Company infrastructure, Support and Backup
- We arrange a qualified electrician as per the Warranty requirement to do the inspection of the unit on date of installation (non-negotiable)
In addition, Heat Pump Water Heaters installed by Under Pressure Plumbing:
- Are Environmentally friendly
- Are aesthetically pleasing – an important consideration for group residential schemes
- Does not use panels which can be damaged by heavy hail
- Only use components and parts of superior quality
- Heat Pump units have a fully automated Anti -Freeze function
- Is Superior Corrosion Resistant
- Is Suitable for Thatched Roofs
- Has a 1 year Warranty with limited 5 year extended Warranty
- Does not require direct sunlight - heats water day or night, rain or shine.
- Includes a Remote Control with Timer
- Has Low running costs
- All installations NOT done by an Eskom approved supplier will not qualify for the Eskom Rebate.
- Commercial Units do not automatically qualify for a rebate as energy audits are required.
- New buildings/Residential homes do not qualify for rebates as there is no history of electricity consumption.
- All clients with prepaid electricity will need a statement showing 3 months proof of vouchers prior to installation to qualify for the Eskom Rebate.
- Eskom rebates are per unit, therefore each unit needs to complete a Customer Declaration
- Heat Pump Water Heaters linked to a Generator may not carry the Manufacturer Warranty.
- The unit is designed to operate between -7°c and 40°c ambient temperature.
- The Life Expectancy of a Heat Pump Water Heater is approx 7-10 years
- The Integrated unit is not SABS Approved and therefore may not be recognised by Insurance.
- The existing geyser is disconnected as its only function is as a storage vessel.
- The water temperature is adjustable by remote control from 40- 60 degrees.
- A Heat Pump Water Heater utilizes a fan, which tends to make a small amount of noise. This ought to be taken into consideration when the location of the unit is selected.
- Heat Pump Water Heaters don't function during electricity outages.
- Contact us so that we can give you a quotation according to your requirements
- Sign and return acceptance of quotation*
- A 75% deposit is required before installation will take place (faxed or emailed proof of payment)
- Upon steps 1 and 2 being received, we will arrange a convenient time for the installation.
- On completion of the installation our Customers receive:
- An original tax invoice
- An Electrical and a Plumber's Certificate of Compliance
- A Warranty Certificate for the installed system
- A copy of 6 month half yearly service schedule
*Final costs will be subject to a site visit.
If you are interested in a no-obligation quotation then please contact us and we will get right back to you.
HEAT PUMP VS SOLAR
Both solar and heat pump technologies are energy efficient and environmentally beneficial.
Your choice will depend on a number of factors:
- Capital you have available for the initial purchase
- The projected savings and thus payback period you require
- Confirm your estate or complex requirements with regards to solar panels
For a more detailed analysis between the two, CLICK HERE
Under Pressure Plumbing would recommend that you start to adopt a Heat Pump, Solar or a combination of these technologies, if you haven't yet done so.
For a full report visit: www.savingpower.co.za










