Patent ID: 8635999

Claim:
A size-adjustable and rectangular floating solar pool heater, comprising: an upper film; and a lower film attached to the upper film along a plurality of locations; wherein the upper and lower film comprise a rectangular-shaped central cavity independently inflatable for holding a gas, wherein the central cavity defines a rectangular perimeter comprising a first side, a second side opposite the first side, a third side, and a fourth side opposite the third side; wherein the upper and lower film further comprise a plurality of linear tube sections each independently inflatable for holding a gas or fluid therein, wherein the plurality of linear tube sections are integrally formed about the rectangular perimeter attached to the first, second, third or fourth sides; the width of said tubes depending inversely on the degree of inflation such that the area of said heater is selectively adjustable through a range of water covering areas by adjusting the amount of inflation of said tubes.