An outdoor hot tub is a great place to relax all year round, but heating it during the winter months can be a challenge. Using a pool heat pump is an efficient solution that ensures a comfortable water temperature while keeping operating costs lower compared to electric heating elements.
Efficient Heating Even at Low Temperatures
With the Microwell HP 1100 SILVER Inverter Pro 11 kW heat pump, it is possible to maintain an optimal water temperature in the hot tub even on cold nights. For example, when the nighttime air temperature is -10°C, the heat pump can reliably heat the water to 40°C.
The daily hot tub operation cycle is as follows:
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3:00 PM – 6:00 PM: The heat pump heats the water from 34°C to 40°C.
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8:00 PM – 8:40 PM: The hot tub is uncovered and used as a warm bath without the whirlpool function. Over 40 minutes, the water temperature drops to 38°C.
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After use: The hot tub is covered to minimize heat loss.
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Until 3:00 PM the next day: The water naturally cools down to 34°C, and the cycle repeats.
Energy Savings Compared to Electric Heating Elements
Electric heating elements have high energy consumption because all the supplied electricity is directly converted into heat. In contrast, a heat pump extracts thermal energy from the surrounding air, achieving a COP (coefficient of performance) of 3 to 5. This means that for every 1 kWh of electricity consumed, the heat pump delivers 3 to 5 kWh of heat. In practice, this results in significantly lower water heating costs.
Reliable Operation Even in Winter Conditions
The heat pump is designed to operate reliably at low temperatures. When the air temperature drops below +10°C, frost begins to form on the evaporator, but the pump automatically defrosts itself, maintaining its performance and efficiency. Even at -10°C, it still provides sufficient heating power to warm the water in the required time.
Conclusion
Using the Microwell HP 1100 SILVER Inverter Pro heat pump for outdoor hot tub heating ensures comfortable water temperatures with significant cost savings compared to traditional electric heating elements. With high efficiency, automatic defrosting, and the ability to operate at low temperatures, it is the ideal choice for year-round hot tub use.