SunEarth Solar Thermal Collector Flat Plate, 4' x10', Black Chrome Absorber, Low Iron Tempered Glass, Black An, EC-40 The Empire Series Liquid Flat Plate Collectors – The Solar Professional's First Choice America's leading distributors and contractors have made the SunEarth Empire Series liquid flat plate collectors the solar professional's first choice. The Empire Series has everything that professional contractors demand in a solar collector: sleek appearance, high performance, versatility, ease of installation, and rugged field-tested durability. SunEath's Empire Series collectors have over thirty-two consecutive years of engineering and design experience built into every product. The Empire Series collectors define quality and value in the North American market. The Empire collectors' versatility make them the best choice for residential, multi-family or commercial systems. Large diameter Type-M copper riser tubes allow the Empire collector to be used in glycol forced circulation, drainback, or open-loop system configurations depending upon the climate and application. Available with either 1" or 1.5" internal headers, the Empire makes multi-family and commercial projects simpler to design, install, and maintain. The Empire's large commercial headers allow more collectors to be safely installed in a bank while continuing to accommodate normal expansion and contraction in the fully plumbed array. Solar water heating should never be a gamble. With SunEarth's Empire Series collectors professional contractors rest easy. They know their customers will enjoy trouble free and persistent energy savings for many years to come.