Thanks for the info. Nice website Sandro. I am thinking I will try to sell some installations. There are guys that do this kind of work already along with other things such as intercoms, alarms, lv work etc. What kind of money can you make with this kind of work. Can I charge my full rate as a Master Electrician to install vac systems? What about markup on the units and accesories? Probably things I should know before I jump in headfirst.