Our own engineers oversee the assembly to ensure that the highest quality standards are met at all times. Our entire range of heat pumps use 410A and 134A ozone friendly refrigerants and each unit has been rigorously tested in the state of the art climate control testing facility to ensure Firefly heat pumps set the standard in efficiency and reliability. Our installation method ensures that you get more hot water out of your geyser.
We oﬀer a two year warranty, subject to your service plan, with a two year warranty on the heat exchanger
Let’s look at some maths on how our heat pumps saves you money
- A 200 litre geyser has a 4KW element. A bath or shower in the morning for a family takes up about 30 minutes of use (drains the geyser) lets assume that the recovery time is 1.5 hours. The same in the evening. This gives us a total of 4 hrs per day
- A geyser has a heat loss of 3.6 hours per day on average. Lets round this down to 3 hours. This gives us a total of 7 hours usage per day. Multiply this by the 4KW and by 30 days gives us a total of 840 KWhrs.
- In most cases if the variable (number of hours) is correct the kilowatt hours should be between 60-80% of the total usage in a household (the average household). 840 x R1.47 = R1 234.80 (residential incl. VAT)
A FFD-5.4 has a power input of 1.28 KW and an output of 5.4 KW (or kilojoules)
- We use the same maths keeping the variable the same
1.28 x 7hrs x 30 days = 268.80 KWhrs 68.80 KWhrs x R1.47 = R395.14
That’s a savings of 571.20 KWhrs or the equivalent of 571KG of CO2 – The rand value savings is R839.66
How to choose the right domestic heat pump for your hot water requirements
As we have sold and installed about 8000 domestic heat pumps we believe that we can give you great advice here from our experience. Most domestic geysers use 1kW of electric element to 50L of hot water storage.
Therefore if you were not running out of hot water your system requirements will be as follows
- 3.8kW on a 150L geyser
- 5.4kW on a 200L geyser
- 7.6kW on a 300L geyser or 2 x 150L geysers in series
- 9.3kW on 2 x 200L geysers in series
However when you have multiple geysers this can change if you have 2 x 200L geysers and there is only a few of you in your home. You could step down on the heat pump size as your water storage is quite high. Remember that it will just take a bit longer for the smaller heat pump to reheat the water. In my home I have a 400L tank with a baby 3.8kW heat pump and I never run out of hot water. For professional advice please do not hesitate to contact us