What is there deal?

I went on a business trip just the other week. Something that I noticed when I came back home was the refreshing air quality. I asked my wife what she did since the house smelled great and felt fantastic! She let me know that she contacted our HVAC company to have an air purification system installed. She told me how she didn’t like that I was always whining about the air quality and decided to do something about it. I certainly was impressed with this new air purification system. I had to protest that I wasn’t whining all the time like she was saying. She said I absolutely was whining, just like a little kid. I just let all that slide because I was just happy to have this new air purification system inside of my home. All I would need now was a smart thermostat! When I went around the way and seen there was a new smart thermostat already installed, that’s when she said, “Oh by the way I had a smart thermostat installed as well.” I couldn’t believe it! I asked her how much did it cost to have all this done and she showed me. I was relieved that she got a great deal on everything. I wanted all these things done, sure, but I didn’t want to break the bank either! She was explaining that the smart thermostat itself should save us a great deal of money and it would give us suggestions on how to save money with using our HVAC system. It sounded good to me, but I already knew a thing or two about smart thermostats.