Quiet solar attic roof fan operating at 30 dB noise level

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Some information about Quiet solar attic roof fan operating at 30 dB noise level:

Product Type	Solar Fan
Company Name	SUNNY INTERNATIONAL POWER LIMITED
Core Components	Motor
Production experience	10+years
Place of Origin	Guangdong,China
OEM and ODM	Yes
Product Features	Intelligent,Environmentally friendly,Energy-saving...
Power Source	Solar
Motor	Grade BLDC Motor
Application	greenhouse farms,industrial buildings,residential house,factories...etc
Payment	paypal,Cash,Western Union,T/T...etc
Whole unit warranty	5 years(in condition of no acid nor alkali corrosive environment)
Designed lifespan	15 years+
Materials	Metal&Plastic
Packing	91 * 25 * 99 According to container size, standard export package
Certificate	ISO,CE....
Battery	lithium battery
Color	Grey,White,Blue, and customized color
Port	Guangzhou...
Control Method	Intelligent control
Trading Country	Africa,South america,North america,Europe,Venezuela,Malawi,Yemen...
Selling Units	Single item
Work Time	Day & night nonstop, sunny hours by solar panel, sunless periods by battery
After-sales Service	Online support