Install, troubleshoot and startup commercial HVAC including: Commercial DX equipment up to approximately 25 tons, intake/exhaust fans, split systems, heat pumps, water source heat pumps, mini-splits, electric motor controls, light commercial furnaces, unit heaters, economizers, humidifiers, air compressors. Work Environment: Exposure to weather, extreme heat or cold, high noise intensity level, atmospheric conditions, exposure to electrical shock, exposure to toxic or caustic chemicals, wet and/or humid, vibration, proximity to moving mechanical parts, working high exposure places.