The first envirovent installation representative was unaware of my exact requirements so communication between the company and franchise agent needs to improve ! A return visit was required as the incorrect system that installed was not the one purchased. The franchise rep only noticed as the amount he received was not what he expected! A second installer had to attend and he was AMAZING, he went above and beyond what was required. I was disappointed with the follow up by My franchise agent; I was slightly misled about the running cost of the unit and he still hasn’t answered my questions!! The environvent system works and I’m very pleased with the product; just not the representative, I wouldn’t recommend him.