How To Save With a Heat Pump For Your Spa
Heating your spa or swim spa is one of the simplest ways to get more value and enjoyment out of it, particularly as the weather starts to cool. Most portable spa’s and swim spa’s are fitted with an electric heating element which are inefficient and expensive to run. Heat pumps are an increasingly popular choice for spa owners looking for a practical improvement in performance and a reduction in running costs.
How Heat Pumps Work
Rather than generating heat directly like a traditional electric element they work by transferring heat from the surrounding air into your spa water. A heat pump uses a combination of airflow, refrigerant and compression to extract warmth from the atmosphere and transfer it into your spa water. Air is drawn into the unit, heat is absorbed and compressed and then transferred into the water via a heat exchanger.
While the process is quite technical internally, the outcome is straightforward. You get consistent, controlled heating without the high energy demand typically associated with electric heaters. Because the system relies on moving heat rather than producing it, it can deliver a much higher output compared to the electricity it consumes. This is what makes heat pumps such an efficient option for spa and swim spa heating.
1. Why They’re So Efficient
A heat pumps efficiency is measured using the Coefficient of Performance, or COP, which compares how much heat is delivered versus how much electricity is used. In simple terms, it shows how efficiently the system operates.
A quality heat pump can deliver multiple kW’s of heat output for every kW of electricity consumed. The Neptune X-Pro range has a COP of up to 16 and the new Astral Pinnacle range has a COP of up to 22. The Pinnacle SD107 can produce 2.65kW heat output whilst consuming only 0.12kw of power.
(https://www.astralpool.com.au/pool-heaters/heat-pumps/pinnacle)
This difference is what makes them such a strong option for ongoing use. You are getting more heat output for less energy input, which translates directly into improved efficiency ie: they heat the water faster and reduce running costs.
2. Heat Pumps and Running Costs
Most spas come with a built-in electric heating element which usually take a long time to heat the spa making them impractical for occasional use so you either need to plan to use the spa a day or more in advance or run it all the time. However, as usage increases, so does energy consumption.
A larger spa or a swim spa used several times a week can become expensive to run on an electric element alone. A swim spa will likely have an electric heater drawing 3-5.25kW of power and a regular portable spa a 2-3kW element without any multiplier making them much more expensive to run when compared to a heat pump.
3. Heating and Cooling Capability
One advantage that is often overlooked is that many heat pumps can also cool the water. This can be particularly useful during warmer months, especially for swim spa owners or for spas that tend to overheat in summer. Being able to both heat and cool the water gives you more control over your spa temperature year-round, rather than being limited to heating only.
Key Considerations Before Installing a Heat Pump
Like any piece of equipment, a heat pump will perform best when it’s correctly selected and installed. A few key factors can make a significant difference to performance and efficiency. Getting these factors right ensures the system operates as intended and delivers the efficiency benefits heat pumps are known for.
- Calculate the size according to your spa and usage requirements
- Ensure your spa pump can produce sufficient water flow to run the unit
- Ensure there’s enough power to run the heat pump
- Position the heat pump in a well-ventilated area and follow clearance requirements.
- Keep the heat pump as close to the spa as possible
- Keep the unit away from water sources such as sprinklers to avoid water damage.
- Use a level concrete base to minimise vibration.
- Ensure the heat pump is placed last in your flow system but before any auto sanitiser as these can corrode the heat exchanger.
- Insulate the pipes to reduce heat loss if pipe runs are excessive.
Final Thoughts
Heat pumps have become a popular choice for spa and swim spa heating because they offer a reliable and energy-efficient alternative to traditional heating methods. When sized correctly and installed in the right conditions, a heat pump can significantly improve both the comfort of your spa and the cost of running it. For many owners, it is a simple upgrade that makes regular spa use more practical and enjoyable.
If you’re considering a heat pump for your spa or swim spa feel free to speak with the team at our store. We’re always happy to help you find a solution that suits your spa, your usage and your budget, “Because everybody deserves a safe and healthy pool”.
