Ecovent Reviews . See bbb rating, reviews, complaints, & more. Keen is more focused on providing these. DRYER VENT SUPREME Video Review of the EcoVent Baileylineroad from www.pinterest.com After installation, use it everyday to control and operate ecovent to make each room. Keen would cost $199.97 (vent $109.99 + hub $49.99 + sensor $39.99), flair would be $168 (vent $69 + puck $99). Home controls offers free support to assist you with product advice and system designs.