I loved going to work in the summer for the simple reason that our offices had a sound air conditioning system. Every floor had its digital thermostat. The people in charge of managing the building never missed the air conditioning tune-up, and they also knew what to do and not to do when it came to a/c care. I was always curious to see the type of cooling products installed because it was superior compared to my central air conditioning installation. I once asked one of the janitors, but he had no idea. I always kept an eye open for any a/c rep or an air conditioning business car, but I was never lucky. It was as if the cooling equipment never needed any air conditioning repair or if it required any; the air conditioning expert came when we had already left. One fine summer morning, I met a technician coming into the building. He told me he had come to replace the air conditioning filter and check if the heat pump was in good condition. I asked more about air conditioning, and the a/c professional was patient and kind enough to answer them. I even went as far as accompanying the cooling specialist with the promise of not being a distraction or getting in his way. He handled everything with such skill it was interesting to watch. After he finished, I asked him if such systems had similar cooling technology for residential homes. He told me there were and even gave me examples and an estimated installation cost. The cost was scary, but such indoor comfort came at a price.