Helped Miguel and Luis install second floor ac unit. Started by laying drop cloths to attic hatch and plastic around clothes in closet. Next located condenser and breakers associated with unit. Disconnected supply and return box while Luis got unit ready to be taken out. Helped bring unit to attic and reattach boxes both sides. Cleaned areas after they finished with install. Got everything ready outside to be loaded in truck at end of day. Learned a few things as well.