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 really concerned me was the cold and temperamental weather we were about to encounter during the end of canadian winter. We currently reside in a warm and humid semi-tropical climate and I’ve become embarrassingly accustomed to having warm air around me at all times. The prospect of dealing with cold and blustery winter weather was not something that thrilled me, but I decided it was worthwhile to go on the trip anyways. When we arrived at our destination I was completely impressed with how the citizens have adapted to living in such a difficult climate! Everyone wears heavy winter clothing to support an active outdoor lifestyle up there. They walk from place to place in thick boots and Eskimo coats rather than relying on heaters aboard cars and buses. They have also figured out an ingenious way to keep cold air out of their residential spaces. Namely, this fancy 2-door entry system that I encountered at several locations served to efficiently trap warm air inside and cold air outside. The premise was simple; 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 air that could rush into the indoor space. Sure, it took a few extra seconds to enter each building, but this system was highly effective at keeping the brutally cold outdoor air outside where it belonged.

New air conditioning information