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5 years labour and Yes lifetime on the part as long as you own your tub There is no element immersed in the water & that is the reason it is that long bad water chemistry will void only if it eats throught the metal.The Cal warranty is mostly the same as many manufacturers in certain areas you can place a clear copy of a Jacuzzi Sundance Coast Cal and a Couple others on top of each other and will match up word for word.
re: How does the heat transfer into the water if the heating element doesn't directly contact the water? Exclusive 5.5 kW XL Heat ExchangerHeating coils are wrapped around a heating chamber through which water safely passes as it is immediately and efficiently heated.Coils are thus are isolated from water contact and protected against any possible corrosion, the key cause of heater failure.The heating chamber's large surface area allows for a greater volume of water to be more quickly heated.High-density insulation ensures utmost thermal retention and maximum heat transfer to the spa water.CalSpas Lifetime Warranty