http://www.ritehite.com/products/doors/cold-storage/iso-tek/

In the fast paced cold storage industry, it’s amazing how slowly door improvements have evolved.
Faced with the choice between rigid barriers and hanging strips or poor sealing plastic doors with energy guzzling panel defrost systems. Many facilities have been forced to operate like they are still in the Ice Age. If you're running a cold storage facility you cannot afford to be snowed under by the high cost these doors can create.
Energy expenses at every opening are a major concern. As you try to minimize heat gain from both conduction and more importantly infiltration from poor sealing doors.
So which type of door should you choose? A rigid door that can be easily damaged? A flimsy plastic door that leaks air? Or a costly two door set up like this. Now, you don't have to choose. Now you can get high speed access for productivity and a superior insulated seal for energy efficiency.
Get two doors in one with the remarkable ISO-TEK door system from Rite-Hite Doors. It is the unique cold storage store that gives you all the advantages you need. High-speed access to keep your operation running at peak performance. Superior sealing for environmental separation and reducedenergy costs. High efficiency insulation for more energy savings. And impactability to minimize maintenance and downtime.
ISO-TEK doors are also impactable. Made with high density flexible foam core panels. On impact, Iso-Tek doors with their hinged panel design swing right back into place and keep on working so you don’t have to worry about damage and downtime and costly repair of conventional hard core doors. And, the tight seal is maintained.
For more information about cooler and freezer doors visit
http://www.ritehite.com/products/doors/cold-storage/