The Thermo Panel III is the same as the Quick Panel III except that the Thermo III uses two panels of tempered glass instead of one. This has some great advantages mainly in the areas on cost savings. With the multiple panels of glass your heating and cooling bills will drop compared to a single panel. If you live where there are harsh winters or scorching summers then you’ll do best with the Thermo III.
The Thermo III features the extreme performance Endura Flap which is simply the best flap on the market. No more leaks, durable and long lasting so you won’t be replacing flaps all the time.