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The spa heater has always been the most replaced part on spas since their invention. The problem is that water contacts the heating element directly. The very same chemicals you use to maintain water purity, eventually end up on the element and corrosion slowly kills it.
This is a typical spa heater. Notice the intake and outlet at the top and side. The element (the coiled part) is contained within this chamber. You can see that water passes directly over the element. Deposits and sediment accumulate at the bottom of the chamber and on the element. This is where the majority of all spas fail first. Starting with the premise that the element must never contact the water, we built the "Chem Free" heater.
Encased in stainless steel and located outside the water chamber, the Chem Free heater is the finest in the industry. Instead of one element bent in various twists and turns like the traditional spa has, our heater has four separate elements. Each one functions individually. If one should fail, the other three remain active. In fact it is possible for three of the four to fail and your spa would still operate.
In this cross section you can see the individual elements are completely outside the chamber and the four separate connections. The straight elements remove the stress points typical heaters have, when bending elements for greater surface area.
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