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Typically uses a smaller 1 kW – 1.5 kW heater. These are easy to install but heat slower, making them better for mild climates.

Generally uses a more powerful 4 kW – 6 kW heater. Preferred for faster heating, colder climates, and better performance. buy hot tub heater

Never try to install a higher-wattage heater than your system is designed for, as this can destroy the circuit board or cause a fire. 2. Types of Heating Systems Typically uses a smaller 1 kW – 1

Ensure the heater matches your spa's circulation pump. Preferred for faster heating, colder climates, and better

These offer rapid heating (1–2° per minute) and lower operational costs in some areas, but they are expensive to install and require a certified gas contractor.

Modern heaters often use smart sensors (like the Balboa M7) mounted inside the heater, eliminating the need for an external pressure switch.

Before buying a new heater, you must know your current setup.