The installation went just as scheduled by Alex-three techs showed-up. I thought they went to lunch in the middle of the job but when they came back in. I asked if they still had to hitch the unit to the top of the building. They inform me no; that's what they were doing. Look-out for the language difference it is interesting they all communicate in Russian. I did have a slight condensation leak the next day-Saturday. Alex called me back personally-scheduled a service call-the next day- Sunday. The technitian showed-up on time & was very pleasant - added a slight modification. We joked a bit! He appologize I hope my jokes were not bad taste.