List price is $1795 for the ES-6400 with a 16 year warranty and infinitely variable speed. It pulls 6,320 CFM at just 505 watts and if you run it at low speed it takes under 100 watts. No other source has this performance.
As of May 14, 2018 you can get $100s off of this powerful whole house fan when you add zero down solar power to your home. In fact, depending on the size of the solar system you add, your whole house fan could be included at no cost.
Call Thor for more details – 951-296-3611
Here are some great testimonials.