I loved going to work in the summer because our offices had an excellent a/c system that ensured we had excellent air quality.
Every floor had its digital thermostat.
The people in charge of managing the building never missed any a/c service, and they also knew what to do and not do when it came to a/c care. I was always curious to see the type of air conditioner installed because, compared to mine, it was superior. I once asked one of the janitors, but he had no idea. I always kept an eye open for any a/c worker or an air conditioning company car, but I was never lucky. It was as if the unit never needed any a/c repair, or the a/c representative came when we had already left. One fine summer morning, I met a technician from an air conditioning business coming into the building. He told me he had brought a new air conditioning filter and followed up on the a/c care plan. I asked many questions, and the tech was patient and kind enough to answer them. I even went as far as accompanying the air conditioning supplier with the promise of not being a distraction or getting in his way. He handled everything with so much skill it was interesting to watch. I was with him throughout the air conditioning maintenance. After he finished the task, I asked him if there were such air conditioner installations that one could use for residential homes. He told me there were and even gave me examples and an estimated cost of installing them.