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Thermal resistance (R-value) and thermal conductivity (k-value) are two important indicators when evaluating insulation materials. The higher the thermal resistance, the better the insulation performance of the material; the lower the thermal conductivity, the slower the material transfers heat.

Taking a hot bath for 30 minutes can burn approximately 80 calories. If you use a hot tub to take a bath, you will burn even more calories, about 120 to 200 calories, which is equivalent to the calories burned by walking for 30 minutes. In this article, I’ll help you learn more about taking hot baths for weight loss and explore whether it’s a good fit for your weight loss plan.

Hot tubs can burn a small amount of calories, but if you want to lose weight you still need to exercise moderately and eat a healthy diet.

Hot tub disease (Hot Tub Lung), also known as "hot tub lung disease", refers to a lung disease caused by specific microbial infection or allergic reaction of the human respiratory system after inhaling water vapor or aerosol in a hot bathtub. It is a rare but real respiratory disease that is mainly related to a bacterial infection called "nontuberculous mycobacteria" (NTM).

If the air in the pump and pipes is difficult to exhaust, you can try to tilt the outdoor hot bathtub appropriately to allow the air to concentrate at one end of the pipe before exhausting.

The depth of soaking bathtubs is usually 60-80 cm, enough for water to cover the neck, which can provide a deeper relaxation experience. The design of freestanding hot bathtubs is mainly for lying flat, usually spacious, long, and relatively shallow, about 45-60 cm.

When air humidity is low, water evaporates faster. When the air already contains less water vapor, water evaporates faster into the air. Therefore, in dry summers, especially in areas with dry climates, water in an outdoor hot bathtub evaporates more easily.

If you pursue milder water quality, less daily maintenance and potential long-term cost savings, a saltwater hot bathtub may be a more ideal choice. If you prefer more flexible water quality management, lower initial investment and traditional chemical maintenance, a chlorine hot bathtub is a more practical option.

Generally, the chlorine concentration in the outdoor hot bathtub should be kept between 3 and 5 ppm (parts per million). Higher concentrations may be harmful to the human body. If a high dose of chlorine is used during shock treatment, the waiting time may need to be extended, even to several hours.

The water temperature of outdoor hot bathtubs is usually higher, usually maintained at around 37°C to 40°C. While these temperatures are ideal for relaxation and muscle tension relief, they are also ideal for the growth of certain bacteria and microorganisms.

The balance of chemicals is very important for the water quality of the outdoor hot bathtub. If the concentration of chemicals in the water is too high, especially when it comes to foaming agents and lubricants, the water will produce more foam under the impact of the strong water flow of the jet.

Generally speaking, the price range of swim spas is wide, ranging from about $10,000 at the low end to $30,000 or even higher at the high end. The price of hot bathtub is relatively affordable, with low-end products ranging from about $2,000 to $5,000, while high-end hot bathtubs usually cost no more than $10,000.