We all live, work and play in the comfort of air conditioning - or so we think.  I have seen firsthand in my home, office building and place of worship, back doors and windows left open, counteracting, not to mention wasting money on the air conditioning.

When hot air is let into a room the air conditioning unit must work harder to cool the rooms increasing temperature. When a door is opened at an air conditioned building the cool air flows out since it is heavier than warm air. Imagine it as a pool of water lying on the floor, with the door open it just flows out of the building.

Some may say, “Well, I just want a little fresh air in my office.” That’s a valid point that air conditioning manufacturers have thought of and ingeniously provided.  There are fresh air inlets in the HVAC equipment to introduce fresh, filtered air into our rooms and buildings. So go ahead and breathe easy!

One more way to look at this concept is to visualize a refrigerator.  To keep everything cool the door must be shut, not open.  When the refrigerator door is left open, energy and ultimately your money is wasted.

It is the same with air conditioning in our homes and offices.  When doors and windows are left open your air conditioner is less efficient. My tip to stay cool and save money this summer is this: keep your door and windows closed!