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Mine is a roof mount, since I have a hip roof with no gables. There is no temperature control, though I have modified mine with a remote on/off switch which I can control from inside the house so I can turn it off in the winter. You can't hear it operate unless you are within about six feet of it either on the roof or up in the attic. It definitely can't be heard inside the house.
This is my second solar powered attic fan and the solar panel included with both was a little on the weak side (both 10 W). I added a bigger panel with my previous fan and it ran much faster with much more airflow. I'll probably eventually do that with this fan, also. They are usually designed to handle as much as 36 Vdc.
I removed my first when I had my cement tile roof replaced (after 44 years). I still have my first fan and will probably add it to my roof this coming spring.
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