Air Source Heaters for Swimming Pools
We explain to you how an air source pool heat pump works and how to choose the right unit size for your pool. When making your choice, you must consider a few factors.
Air source heat pumps are very efficient, more efficient than electric heating and gas/propane boilers. However, they do have limitations.
These factors must be considered if you are installing it as the main source of heating for your swimming pool.
How does a swimming pool heat pump work?
A standard medium or high temperature heat pump can be used to heat a swimming pool if connected to an appropriately sized heat exchanger, but there are also dedicated pool heat pumps.
Swimming pool air source heat pumps are often simpler than the heat pumps you see hooked up to your home's central heating and hot water. A swimming pool air source heat pump has a larger heat exchanger (usually made of titanium, which is resilient to the high chemical composition of the swimming pool water), allowing the swimming pool water to flow through it faster because the swimming pool filter pump is running. Higher water flow rates result in lower temperature rise per cycle and therefore higher efficiency.
Because there are circulating pumps now, and the temperature rise is low, the ambient air temperature is usually higher, and the average efficiency can exceed 500%. So for every 1kWh of heat pump running, it will deliver 5kWh of heat to the pool.
What size heat pump do I need for my swimming pool?
The size of the pool and heat loss needs to be defined, then a suitable heat pump is specified to make up for the heat loss, and it also has the ability to reheat the pool if you allow it to cool seasonally.
Many swimming pool circulators will run about eight hours a day. The heat pump should be able to deliver the required heat to the pool during these times. If reheating is required, the pool pump runs longer. Indoor pools have lower heat loss than outdoor pools, but with indoor pools, you also need to allow the air in the billiard room to be heated and circulated. The air temperature is usually kept about 3 degrees warmer than the water temperature to mitigate evaporative losses.
Air circulates at a much higher rate than is required in a domestic home, so standard Mechanical Heat Recovery Ventilation (MVHR) units are not suitable for this purpose. A dedicated pool ventilation unit is required, and these typically also manage heat transfer to the air and pool water.
How much does a heat pump for a swimming pool cost?
Dedicated swimming pool heat pumps can be much less expensive than air source heat pumps, which are often attached to our homes for central heating and hot water production.
Dedicated swimming pool heat pumps start at around £1,500, but for a complete air handling unit with thermal management you may need upwards of £15,000.
The running cost of heating a swimming pool with a heat pump
The running cost of a swimming pool heat pump will be proportional to the heat loss from the water.
Heat loss in outdoor pools is usually much higher than in indoor pools due to evaporative losses, lack of insulation and exposure to cold winds.
As a very general guide, look at the surface area in square meters, then use about 200W per square meter for a bare outdoor pool to about 50W per square meter if the pool is in a protected location with good thermal coverage.
Why buy from us?
We are a professional swimming pool heat pump manufacturer with more than 20 years of production experience.
Features of our pool heat pumps:
(1) Inverter Motor Technology
This is a system that can use 20% to 100% of its maximum output or anywhere in between to maintain the desired pool temperature.
This saves energy and makes the unit quieter, and it also eliminates the amp spikes found when starting cheaper units.
(2) R32 refrigerant
Almost all units in our range are R32 compliant, except for the larger commercial units. R32 refrigerant is a highly efficient and environmentally friendly refrigerant with no ozone depletion.
(3) Defrost function
Unlike some models that only have a heated tray to keep the unit from freezing. Gas recirculation will prevent freezing when the water is not being heated. It will return hot refrigerant around the system, keeping it frost-free without wasting any energy.
(4) Heat exchanger
Look for a titanium exchanger as it is stronger than the stainless steel or nickel plated versions. It will be more resistant to poor pool chemistry (such as low pH) and can handle salt chlorination systems.
The latest technology is the twisted tube model, which provides a larger surface area for heat exchange.
(5) COP (Coefficient of Performance)
Now is the time to explain the mysterious COP rating. In short, COP is really just a measure of how efficiently a heat pump can extract heat from the surrounding air. It does this by calculating how many kilowatts are used to operate versus the kilowatts of heat produced.
At an average temperature of about 10-15°C, our device can produce a COP ratio of around 5-7. This means that for every 1 kW of energy put in, you can expect to return 5-7 kW of heat from the air. This is by far more efficient than a condensing boiler.
(6) Silver welding
Silver welding technology makes unit systems more reliable; refrigerant leaks are likely to be avoided
(7) Low noise fan
Axial flow fan is selected, with large air volume and low running noise
(8) Intelligent control
The unit adopts intelligent control system: microprocessor-based digital controller with liquid crystal display