Pioneering a pet flap that seals airtight has made us the #1 energy efficient pet door brand in the world.  But, what also makes us unique, and in great measure has made us the #1, is the credibility we have earned in the arena of home performance and energy efficiency. Unlike our major competitors we are the first and only pet door Energy Star partners and home performance experts recommend for your home. These expert endorsements bypass the usual energy efficiency claims made by our competitors and thus ensure we offer the best energy efficient pet door you will find.