Thermal performance of solar hot water systems should meet the relevant solar products with current national standards and design requirements, the normal life of the main components of the system collectors, storage tanks, brackets, etc. should not be less than 10 years, Solar Energy Technology Co., Zhejiang Yi Puli The company two years free warranty, the service life of up to 15 years. Solar hot water systems should be safe and reliable, with built-in heating system must ensure the safe use of equipment, depending on the region and take antifreeze, anti-condensation, anti-overheating, lightning, hail, wind, seismic and other technical measures. Solar hot water systems shall comply with the central heating water systems, centralized - decentralized heating water systems, decentralized heating water system pipes and risers in the hot water circulation, which is the so-called "double-pipe loop" The purpose is to reduce the hot water heat loss during backwater. Texas Solar Energy Engineering Co., Ltd., Zhejiang Yi Puli heater service quality and quantity, absolutely reliable factory direct selling price