What is Thermal creep?

Understanding Thermal Creep in Hot Tubs During Warmer Weather

During warmer weather, a phenomenon known as "thermal creep" can occur in hot tubs. This happens when high ambient temperatures, combined with effective insulation, make it difficult for excess heat to escape. As a result, the water temperature in your hot tub may gradually rise above the set value.

• Well-Insulated Hot Tubs: The insulation in your hot tub is designed to retain heat efficiently, which is especially beneficial during colder months. However, in warmer weather, this same insulation can trap heat, leading to a rise in water temperature.
• High Ambient Temperatures: When the outside air temperature is high, the hot tub naturally absorbs more heat, adding to the thermal creep effect.

Thermal creep is not typically a sign of a malfunction with your hot tub. Instead, it highlights the effectiveness of its insulation. While it might seem concerning to see water temperatures exceed your set point, it’s a natural response to warm weather conditions.

1. Ventilate Your Hot Tub Cover: Leave the cover slightly open (if safe) to allow excess heat to escape.
2. Reduce Filtration Cycles: Check your hot tub settings and reduce the duration or frequency of filtration cycles, as these can generate additional heat.
3. Use a Floating Thermal Blanket: Replace the main cover with a lightweight thermal blanket during the hottest part of the day to minimize heat retention.
4. Add Cooler Water: Occasionally adding cold water can help balance the temperature.
5. Shade Your Hot Tub: Use a canopy, pergola, or shade cloth to reduce heat absorption from direct sunlight.

For long-term solutions, consider a summer-friendly cover with reduced insulation properties, designed to handle higher ambient temperatures without trapping excessive heat.

By understanding and managing thermal creep, you can enjoy your hot tub safely and comfortably, even in the warmest weather.

 1. Decrease filter cycles: Reduce the frequency or duration of the hot tub's filter cycles to minimize the circulation of hot water, thereby reducing heat buildup and mitigating thermal creep.

2. Improve ventilation: Ensure proper ventilation around the hot tub and within the cabinet to facilitate airflow and heat dissipation. Clear any obstructions and consider using fans or other ventilation methods to enhance air circulation.

3. Leave the cover open during hot days: Allowing the hot tub cover to remain partially or fully open on hot days promotes better airflow and facilitates the escape of excess heat, preventing excessive temperature rise.

4. Use ice or cold water: If the hot tub's temperature has already risen above the desired set point, adding ice or cold water can help lower the temperature quickly. However, be cautious not to overcool the water, and monitor the temperature closely.

5. Optimize temperature control: Adjust the temperature control settings to maintain a slightly lower desired temperature, considering the additional heat generated by the motor and external factors.

6. Shade the hot tub: Create shade around the hot tub to minimize direct exposure to sunlight and reduce heat absorption. This can be achieved by using umbrellas, installing a gazebo, or utilizing natural shade sources.