It costs more to manufacture an energy efficient pet door and/or an insulated doggie door and that is why the prices are a little higher than doors that are not specifically designed for energy efficiency. But it doesn't take very long at all to get your money back in home energy savings. Many models come with dual-flap options and in the case of patio pet doors many offer dual-pane glass such as Thermo Panel IIIe models by Patio Pacific with the amazing Endura Flap.
We offer a large selection of brand-name energy efficient doggy doors. Energy efficiency is one of the largest quality differences among the various pet doors on the market.