(a) A full one year warranty by the installer against malfunction or failure of a solar thermal system due to improper installation or a defect in standard pipe, ducts, switchboxes and hardware utilized in installation;
(b) A full one year warranty by the system manufacturer and the seller against a defect in materials, manufacture or design of a solar thermal system; and
(c) A full three year warranty by the system manufacturer and the seller against a defect in materials, manufacture or design of a solar collector, tank or heat exchanger. 3. No person shall offer a service agreement for a solar thermal system unless such person shall have developed a service capability for such system.