A study in incompetence. Replaced a Carrier furnace with them 11 months ago. First they discovered the Carrier thermostat was nit compatible with Lennox. Wanted to charge me 5 x what the thermostat was sold for online. Second the inspector rejected the venting that had to be redone. Third after one month dual zone motors were fried. After research, discovered they were not compatible with the Lennox electronics. After sharing this they reluctantly replaced them. Finally just this month discovered they had failed to hook up the humidifier to the furnace! In fairness the last tech they sent was suberb but they are clearly not A1. Avoid them at all costs!