Double door system

Recently I was lucky enough to go on a week long road trip into the wild canadian landscape.

I had never been into canadian territory before and was super excited to embark on this trip.

The only thing that truly concerned me was the cold and temperamental weather my buddy and I were about to encounter during the end of canadian winter. My associate and I currently reside in a moderate and humid semi-tropical temperature and I’ve become embarrassingly accustomed to having moderate air around me at all times. The prospect of dealing with cold and blustery winter time weather was not something that cheerful me, but I decided it was worthwhile to go on the trip anyways. When my buddy and I arrived at our destination I was completely impressed with how the citizens have adapted to living in such a hard temperature! Everyone wears heavy winter time clothing to support an active outdoor lifestyle up there. They walk from locale to locale in thick boots and Eskimo coats rather than relying on boilers aboard cars and buses. They have also figured out an ingenious way to keep cold air out of their residential spaces, however namely, this extravagant 2-door entry system that I encountered at several locations served to efficiently trap moderate air inside and cold air outside. The premise was easy; there was a vestibule with two doors leading to the interior and only one automatic sliding door would open at a time. After passing through the first set of doors, you had to wait patiently for that passage to completely close before the next door would slide open. It greatly limited the amount of winter time air that could rush into the indoor space… Sure, it took a few extra seconds to enter each building, however this system was highly effective at keeping the brutally cold outdoor air outside where it belonged.

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