Installing your roof vent was the best thing I could have done for my home in Phoenix. I monitored my summer attic temperatures for one month before installing your solar vent, and for one month after. The average temperature in August and September was 25-30 degrees cooler after the installation! I saw an immediate drop in my electric/cooling utility bills. When I sold my house, the appraiser and the home inspectors both upgraded the value of my home and cited as one feature: the SunRise Solar roof vent system .... Thank you for producing such a good-looking, durable, quality product.