How Much Power (Watts) Does a Water Purifier Use?

Water purification technology allows us to get clean, fresh and safe water in our homes. This devices have evolved during the years, which now provide a much more easier way to purifier non-purified water using various filters. Today, we have a variety of water purifiers on the market, that come in different dimensions, capacity, technology, and power consumption. But how much electricity does these water purifier actually consume? In this article, we’ll break it down into simple terms and give you the answer.

How Much Power (Watts) Does a Water Purifier Use?

So How Much Power (Watts) Does a Water Purifier Use? A typical water purifier uses between 25 to 60 watts of power per hour. The average household uses it for 5 hours per day. According to these data, if we take the average price of 0.13 cents per kWh in the US, well get that it will cost us $0.46 per month or $5.47 per year to run a water purifier.

These devices are most commonly used in areas where there is a shortage of fresh water like India. Water purifiers consume only a bit of electricity and you don’t have to worry that they will affect your electricity bill at the end of the month. In the table below you can see the 5 most popular models on the market and their power consumption.

Water Purifier Models:Power (Watts)Hours per DayCost per month
1. Eureka Forbes Aquasure Smart45 Watts5 hours$0.89
2. HUL Pureit 5L55 Watts5 hours$1.09
3. Kent New Grand 8L60 Watts5 hours$1.19
4. KENT Maxx 7-Litres24 Watts5 hours$0.47
5. Blue Star Excella EX4BLAM0148 Watts5 hours$0.95

As we have already said, the power consumption of a water purifier is approximately 25-60 watts per hour, and they are commonly used for about 5 hours a day. The best way to find out how much power does your water purifier use is to check at the label that is mostly located at the bottom or at the back of your device.

For those who want to learn more, read How Much Power (kWh) Does a Blender Use.

How to Actually Measure Power Consumption?

There are two ways how you can measure the power consumption of any water purifier. The first is by using the data (label) from the device itself and by calculating it, and the second is by using a Kill A Watt Meter. Although both methods are quite accurate, the best results will still be given by using the Kill A Watt Meter, because it is directly connected to the socket and reads the accurately transmitted energy from the outlet.

1. Calculating the Electrical (Power) Consumption

In most cases, the electrical ratings of the water purifier will be marked in terms of either Voltage (V) and Amperage (A) or Watts (W). By these parameters you can easily determine the wattage of your device by using the following formula:

Watts (W) = Volts (V) x Amps (A)

So, to get the precise calculation of power consumption that is expressed in kWh, you need to take these two parameters:

  1. The total capacity of your water purifier that is expressed in watt [W].
  2. The number of hours that your water purifier was used in one day [H/day].

Here you have Water Purifier Calculator, which can make it all easier for you.

2. Measuring By Using A Kill A Watt Meter

This device is very often used in the household when it is necessary to calculate the exact power consumption of any device. Just plug it into an outlet and connect a water purifier through it and all the electricity that passes through the Kill A Watt Meter will be measured and you will have the correct consumption. You can also find different models here on Amazon.

Overall, the power consumption of water purifiers is very small, and it can almost be ignored. It only consumes around 25 to 60 watts, which is almost non-existent compared to other electrical consumers in the house. We can compare that if the average family drinks 3.96 gallons (15 liters) of water per day, it will cost you around $1.52 per year. Although some models may sometimes consume more power, therefore this figure may vary.

How Much Electricity Does a RO Water Purifier Consume Per Year?

Electrical consumption of RO Water Purifier is about 11 kWh per year, which is around $1.42 at the price of 0.13 cents per kWh. But to get to that, let’s use one simple example.

We will make a small calculation to illustrate electrical consumption of water purifier:

If a person uses about 2 liters of water per day, it will consume about 0.03 kW of electricity. The water purifier has to filter 3.3 liters of newly added water to consume 1 kW of electricity. The average price is 0.13 cents per kWh in the US. If we want to calculate the power consumption during the whole year, we’ll use the following formula:

  • 1 persone: 0.03 kW (2 liters/day) x 365 days x 0.13 cents (1 kW) = $1.42 / year.
  • For a family of 4, the electricity consumption will be 4 x $1.42 = $5.69 / year.

Now you can see that the power consumption of the RO water purifier is very low, so you’re electricity bill will not be affected. But on the market, there are many different models of water purifiers so the price may vary.

Can We Turn Off Water Purifier At Night?

In general, water purifier needs to be turned on even during the night. Do not turn them off even at night, because you will save only a bit of electricity. These devices are designed to work all the time and switching them on and off can damage some parts inside.

Difference Between Electric And Non Electric Water Purifier

The main difference between electric and non electric water purifiers besides the usage of electricity is the method which is used for water purification. Most electric water purifiers such as RO models that use pressured water that is then passed through the RO membrane, it uses UV radiations to kill microorganisms. On the other hand, non electrical water purifier is using a sediment filter that is activated by carbon, UF that catches sediment material and microorganisms.

There are two types of water purifiers:

  1. RO Water Purifier (Electrica)
  2. Nano Water Purifier (Non Electrical)

How RO Water Purifier Actually Works?

Unlike Nano water purifier that does not need electricity to run, RO water purifier is using electricity to conduct water purification. These water purifiers are equipped with RO membrane filter that uses very small holes (0.0001 micrometer, which is equal to ~ 1/10000 hair fibers), whose main task is to remove heavy metal ions and harmful bacteria. This gives us clean water that is ready to drink without boiling.

When we pour water into the device, the water will go through the filter and it will remove impurities, rust, heavy metals, and dirt that are often larger than 1 micrometers. Usually, these devices have bactericidal, softening, and PH balance filters for purified water.

Best Electric Water Purifiers – Energy Efficient

Water Purifiers are very popular in the world, especially in India. RO (Reverse Osmosis) that uses ultraviolet (UV), ultra-filtration (UF), and micro-filtration (MF) technology helps to remove most commonly water impurities. But buying a water purifier is by no means an easy task, so it is very important to buy the one that best suits your needs. Here are the most popular water purifier models on the market.

1. Eureka Forbes Aquasure Smart Plus

The Eureka Forbes Aquasure Smart Plus water purifier is able to store a 6 liters of water and it is made up of a food-grade plastic. It can easily purify hard water up to 2000 PPM into a soft fresh water. The great advantage of this model is that it comes with an MTDS controller that is able to adjust the water taste depending on the source of water. It uses a 6-stage water filtration process that includes RO and UV filters. This model consume 45 W of energy, and it runs on 24V.

2. HUL Pureit 5L

The HUL Pureit water purifier is a simple model that comes with a 6-stage water purification process that goes through RO and MF. It is able to turn hard water with up to 1800 PPM (parts per million) into a soft and fresh water. It comes with a 5-liter storage tank and is capable of purifies up to 12 liters per hour. It is also built from food-grade plastic and it has advanced voltage guard. Power consumption of this model is 55 W, while the operating voltage is 24V.

3. Kent New Grand 8L

The Kent New Grand 8L water purifier is capable of purify 20-liters of water per hour. This model also is able to purify even hard water with up to 2000 PPM (parts per million) and it has Kent’s save water technology that can save water wastage. Overall, this is a great model if you are looking for a water purifier that has a big storage tank (8-litre storage). The technology that this model use is a 7-stage water purification process that includes RO, UV and UF. This is a great model for big families. Power consumption of Kent is 60 W, and the operating voltage is 24V.

Final Thoughts

Water purifiers are a small consumers of electricity and you do not have to worry about them. Filters are the ones that do the purification and for that reason the electricity consumption is reduced to a minimum. I hope this article helped you and if you have additional questions feel free to contact us.

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