Solar Attic Fans in Hawaii?
![](https://secure.gravatar.com/avatar/4a8b5379eef4e84ea325c15902d53797?s=52&d=https%3A%2F%2Fimages.greenbuildingadvisor.com%2Fapp%2Favatars%2F200x200%2Fa.png&r=g)
Hello,
We have a low-slope (2:12) pitch and a very shallow attic space with R-19 fiberglass insulation in Hawaii.
The attic is ventilated with soffit and eve vents. I have been told – “you can’t have too much air intake.” So, I plan to increase the number of soffit vents.
We currently have a powered fan on the leeward side of the home in an eve vent — it seems to help reduce humidity in the attic (I do measure it).
Multiple roofers recommend adding a solar attic fan to our roof.
Does the fan actually release much heat?
I don’t think we have a condensation concern — warm attic and warm roof. But, what do I need to worry about in a ventilated attic in this climate?
Thank you,
Andrew
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
![](https://www.greenbuildingadvisor.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb1.png)
![](https://www.greenbuildingadvisor.com/app/themes/greenbuildingadvisor/dist/img/modules/detail-library/thumb2.png)
Replies
Andrew,
Please avoid duplicate threads. Your original question is at https://www.greenbuildingadvisor.com/question/insulating-low-slope-212-roof-in-hawaii-should-we-consider-venting-above-polyiso. You might want to go to it and response to my AC question.
GBA is a small community, so it sometimes takes a few days to secure input.
Thanks Steve -- my apologies. It was an accident.
Regards,
Andrew