Grandli Tianyang's after-sales service is very poor. My water heater has been broken for 3 weeks. I contacted customer service and they told me that the manufacturer had not made any announcement. The manufacturer only said that the problem would be resolved as quickly as possible. However, three weeks have passed. It seems that the customer is God just before buying. I bought a product because I trusted it, but now I regret it~~~~~~~~~~~
Grandus Solar is good. According to the relevant public information query, the absorption rate of Grace Tianyang flat solar collector reaches 95%, heat conversion rate is 98%, ultra-low heat loss, water production rate hot is 80% and the quality is good. It has a range of products with an annual production of tens of thousands of units. Hongli Tianyang is a trademark registered by Shandong Hongli Tianyang EnvironmentalProtection Technology Co., Ltd. on March 12, 2010. Its main business is electric cookers, air conditioning equipment, heaters, water heaters, water filters and solar water. radiators. Solar collectors, daily bathing equipment, etc.