The town both my wife and I live in is a relatively small village on the outskirts of a huge city. There are a handful of local grocery stores and even several dollar saver stores, but until just recently if either of us wanted anything much more than a few groceries or basic supplies, we had no choice but to venture closer to the city or shop at our the mall. However, that was only until last year when they built a brand new megastore right down the street from where we live. The superstore has essentially anything you could want at a good price even if it’s not always of top quality and is at a worrying low price. And just last I stopped in for a jug of motor oil and saw that they were repairing the HVAC air ducts in the automotive section. The whole store has large metal ventilation that connects to the industrial sized air conditioning powering the store. These are used to distribute the warm or cool air throughout the inside of the store, depending on what time of year it is and the temperature outdoors. However, at least I got a chance to see one of the large vents on the floor while they were doing repairs to the ducting. I never thought about the size of industrial ductwork or vents until then–the vents were at least ten times greater than any of the ones you would expect to find in most modern homes. They have no choice but to make them that large so they can circulate the amount of air that is pushed out by the large central heating and cooling system that keeps the store at a comfortable temperature inside. I never know what I’ll discover next in our little town, and I left the store with a newfound appreciation for the size of the industrial HVAC machines in our megastore.