We purchased the insulation, solar fans, KOOLblue & the EPS System. The results have been incredible. All of my rooms are the same temp, we use less A/C & heat, and the air is cleaner. The EPS unit has been so affective my daughter is completely off her allergy medicine & my allergies are far less. We are no longer suffering! I am so thankful for this company. I highly recommend them & all of their products.