I was looking forward to receiving a new air purification system. I was reading a certain article when I came across peculiar types of air quality systems and how they improved indoor comfort and from then on I was convinced that buying one was a nice method to improve air quality. I had to be at work in the afternoon so I had asked the homeowner solutions supplier to supply it in the afternoon and it was already eleven and no sign of an Heating and A/C tech or an Heating and A/C provider track anywhere. Some hours to midday I heard a knock on the door and lucky for me it was the Heating and A/C professional with the whole-house air purifier. He was also to service the Heating and A/C zone control system since it was already time for its annual service and there was also a leak in the Heating and A/C duct that needed to be sealed. So I left him to get to work however before I left I asked him if that was alcohol smelt because I was almost sure that the guy was drunk. The guy told me yes and showed me a bottle of what he claimed to be ethyl alcohol that he used for electrical contact cleaning. I did not want to get into an fight about it so I left. After they were done I saw them loading some unit in their van and on inquiry I was told they were used for duct cleaning. I had not asked for air duct cleaning and I was not going to spend money for something I had not asked for. His drunk state must have brought the confusion because as far as I was distraught My Heating and A/C installation was doing a nice job in temperature control and it did not need that.