A typical spa jacuzzi bathtub holds between 300 and 500 gallons (approximately 1,100 and 1,900 liters). Each time you drain and refill it, you'll incur a water charge. The exact amount depends on local water rates, but typically, draining and refilling costs range from a few dollars to over ten dollars.

Placing a spa tub in a corner of a home patio or garden offers privacy and is often located away from main thoroughfares, minimizing distractions. Gardens and patios often feature abundant plantings, which can add a natural aesthetic to the spa tub.

Assume a standard 400-gallon outdoor spa hot tub equipped with a 5.5-kW electric heater, an outside temperature of 60°F (15.6°C), and an insulated cover. We can calculate: Heating time (hours) = 400 gallons × 20°F ÷ 5.5 kW ÷ 3412. The result is: Heating time ≈ 1.05 hours.

Of all these components, the most expensive are typically the heating system and the water pump, depending on the tub model and brand. These two are core components of an outdoor jacuzzi tub and directly impact its performance, user experience, and long-term cost.

A common cause is mineral deposits in the water. If your area has hard water, it may contain high levels of minerals such as calcium and magnesium. When these minerals react with other chemicals in the water, they can form insoluble precipitates that float in your outdoor spa hot tub.

The typical water temperature in a spa hot tub ranges from 37°C to 40°C (98°F to 104°F). This range is comfortable for most people and can effectively promote muscle relaxation and relieve joint pain. However, when the water temperature exceeds this range, especially above 42°C (107.6°F), the body is more likely to experience discomfort.