Maybe it was just a fan blowing over some ice or something like that.
We just shelled out a bunch of good money a couple of months ago on a new HVAC system and the thing is just incredible. We got our first electric bill and it is about 70% less than a year ago when we had our old system running in July, one of the hottest and most expensive energy months of the year. I think the new central air conditioner will pay for itself within two or three years with the savings of the power bills. It’s amazing how far they have come in the field and how much better it is for the environment with the cuts in the power usage. HVAC technology hasn’t been around that long in the big scheme of things but they have really made it much more efficient and reliable over those years. I need to google to see when air conditioning was invented and how it worked back then. Maybe it was just a fan blowing over some ice or something like that. I know that refrigerators basically used ice to keep the food cool so I can imagine that AC was probably similar in its technology back then. Now we have solar and geothermal powered units to heat up the house in the winter and they hardly use any energy at all. I still like making a good old fashioned fire in the fireplace in the winter to keep us warm but on days when I don’t feel like chopping wood I can just adjust the thermostat and let the HVAC system do the work.