My appointment time was between 8am and 10 am. The installer (Enrique) arrived at 8:03 am . I had already decided where I wanted the fan to be installed. Enrique looked over the job and said that the location was fine. We talked for about 10 minutes about how the fan would be most effective. Enrique gave me his advice (he has been doing these installations for years). I declined his suggestion for additional vents, since I had a "full ridge vent" installed with my new roof last year. There was no pressure from Enrique, and he assured me that I can have additional vents installed later if need be. When the installation was complete, Enrique demonstrated how the fan works, the distance that the house windows should be opened and other helpful information. It is unbelievable how much air is moved thru the house with this appliance. It is going to be great! Enrique told me that the fan would be noisier in the hallway where I wanted the fan installed...the sound echos in that type of space. Indeed while standing in the hallway, it seems noisy, but in the very next room, the volume was not enough to interfere with watching TV. There is very little noise when the fan is switched to low. Enrique was prompt, professional, courteous, pleasant and well groomed. He respected that I was the customer. He covered the area he was working in and cleaned up when done. He worked quietly...as much as one can when using tools. He is efficient at his job. The whole job was done from knock on the door to driving down the driveway in about 3.5 hours. It is April, and I am sure when Denver gets its streak of 90 degree weather this fan will give the results I want. By the way....Enrique arrived in a fairly new, clean, well organized, well stocked van. This service was top-notch!!! In addition, Seymour, apparently the owner of this shop, interacted with me per email several times last summer, as I was trying to coordinate the fan installation with the new roof project. He spent considerable time giving me information. When I emailed 2 weeks ago I got exactly the appointment time I wanted. Great service all around.