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Sunwe company received solar keymark certificate on 2012.9. The performance is very good from the report

Sunwe company received solar keymark certificate on 2012.9. The performance is very good from the report

The typical household uses 10,000 to 15,000 BTUs of hot water per person per day. A 20 vacuum tube solar collector can produce 30,000 BTUs on a summer day with a footprint on a roof of only 36 square feet. The system can provide 100% of summer hot water ... 
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