SunEarth Oasis OP-32 - 45.625" x 95.25" The Oasis all-copper pool and spa collector provides professional distributors and contractors with an alternative to conventional propylene plastic pool collectors. Unlike plastic pool collectors, the Oasis is unaffected over time by ultraviolet radiation. For best results, SunEarth recommends that the Oasis collector be used in conjunction with a stainless steel or titanium heat exchanger. Pool collectors are typically rated by the Florida Solar Energy Center (FSEC) in the same way that glazed collectors are rated by the SRCC under OG-100 guidelines. Because pool collectors such as the Oasis are un-insulated, the performance drops rapidly with increasing temperature difference.