Over the past year we had multiple HVAC firms diagnose issues with our HVAC system (condensation on outside of upper interior unit leading to discoloration and mold on ceiling sheetrock on floor below). Haddon Baile promptly identified the source and corrected the problem. None of the other three firms had been able to find the root cause and fix the issue- without proposing further investigation and then extremely expensive repairs. Haddon clearly explained to us what he found and in addition provided simple maintenance tips to keep our HVAC system running smoothly in the future. Overall rating: A+.