There is also the small roof turbine: http://youtu.be/nWsVl1t5NQ0
Now, I'd like to put one of these on top and see how my smoke flows through it. Problems with these? The bearings are cheap and freeze up. They also make a lot of noise all night keeping you awake. So....I'm still into an active fan, especially if you combine it with mini evap coolers at all bottom vents. You want constant airflow to get constant cooling. The wind won't help you with that. -- You received this message because you are subscribed to the Google Groups "hexayurt" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hexayurt?hl=en.
