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Question DetailsAsked on 10/6/2017

Is the alumunium sheeting and solar fans a scam or are they helpful to the home owner

Products of YellowBlue Echo Tech

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1 Answer


Here some previous responses to questions about those type products FYI:

As far as the solar powered fans, generally they generate so little power (hence little air movement) they are little better than just a static turtle vent. Generally, for flat roofs powered (120V household powered) fans or turbine-type vents are recommended. For normal gabled (peaked) roofs adequate eave venting and ridge vents for ingress/egress of airflow work best, and are not dependent on power or sunlight.

Also, solar powered vents have a basic flaw - they run during the sunny hot days, but do not run once the sun gets near to going down or in the evening - even though the roof is still radiating a lot of heat into the attic, so a good portion of the time you need heat removal they are not operating. They also need frequent washing because dust accumulation (and leaves and tree sap and such) rapidly degrade their already minimal performance.

Also, on cloudy days, in some conditions much of the thermal energy gets through to the roof (or come in reflected under the clouds from ground radiation), but the clouds can block the light frequencies which power the solar cells enough to cut the solar cell function significantly - causing the fans to not operate despite hot exterior conditions. In my opinion - they are a waste of money, and cost far more than comparable equally or more effective alternatives.

You can find a lot of previous questions with responses on attic ventilation and insulation in the Home > Roofing and Home > Insulation links under Browse Projects, at lower left.

Answered 3 years ago by LCD

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