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About product and suppliers:
        Alibaba.com offers 3,770 passive solar hot water system products. About 1% of these are water treatment. 

A wide variety of passive solar hot water system options are available to you, such as freestanding, wall mounted. You can also choose from stainless steel, plastic. As well as from free samples, paid samples. 

There are 3,763 passive solar hot water system suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Greece, which supply 99%, 1%, and 1% of passive solar hot water system respectively. 

Passive solar hot water system products are most popular in South America, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 2,323 with ISO9001, 710 with Other, and 363 with ISO14001 certification.