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Apr 5, 2024

Choosing the Right Size Heat Pump for Your Pool

G'day pool owners! With our beautiful Aussie climate, having a pool is almost a must-have for many households. But when the temperatures dip, keeping your pool water at a comfortable swimming temperature can be a bit of a challenge. That's where a heat pump comes into play. However, the key question many of you face is, "What size heat pump do I need for my pool?" Let's dive into this topic to help you make an informed decision for your pool.

Understanding Heat Pump Sizing

The size of the heat pump you need for your pool depends on several factors, including the volume of water to be heated, the average outdoor temperature in your area, and how quickly you want to heat your pool. A correctly sized heat pump is crucial for efficient operation, energy savings, and achieving the desired water temperature.

Madimack Elite Max

Factors to Consider

1. Pool Size and Volume

The first step is to calculate your pool's volume, which is typically measured in litres. You can calculate the volume by multiplying the length, width, and average depth of your pool, then multiplying by 1,000 for litres.

2. Desired Temperature Increase

Consider how many degrees you want to increase your pool's temperature. The greater the temperature increase needed, the larger the heat pump required.

3. Average Ambient Temperature

The efficiency of a heat pump depends on the ambient temperature. Australia has a range of climates, so consider the average temperatures during your swimming season.

4. Insulation and Pool Cover Usage

Using a pool cover can significantly reduce heat loss, meaning you might not need as large a heat pump. Good insulation around your pool also helps retain heat.

Heat Pump Sizing Formula

A basic formula to start determining the right size heat pump for your pool is:

Pool Volume (litres) x Desired Temperature Increase x Factor Based on Climate

The factor based on climate varies, so consult with a local expert or use online calculators for more specific guidance.

Example for a 50,000-litre Pool

Let's say you have a 50,000-litre pool and want to increase the temperature by 10°C. Assuming moderate climate conditions, you might start with a factor of 0.13. This would give you a ballpark figure for the size of the heat pump needed in kW:

50,000 x 10 x 0.13 = 65,000

This suggests you'd be looking at a heat pump around 6.5 kW for this scenario.

Choosing the right size heat pump for your pool involves considering your pool's volume, the desired temperature increase, ambient temperatures, and whether you use a pool cover or have good insulation. It's a balancing act between efficiency and power. When in doubt, consulting with a heating specialist can provide you with tailored advice to meet your specific needs.

About Pool Shop

Pool Shop is one of Australia's leading suppliers of pool and spa products, offering a wide range of essentials like cleaners, pumps, lights, chlorinators, filters, chemicals, spare parts, and more. We stock the highest quality products as authorised sellers of leading brands such as Zodiac, Astral Pool, Maytronics, Hayward, Madimack, Polaris, Pentair Onga and more. With a price match guarantee and fast delivery, we ensure a seamless shopping experience.

Visit our shop in Unanderra near Wollongong for personalised service and expert advice or order online.

Contact us on or call 02 9137 8914.