Part 12Mechanical ventilation and hot, warm and cooling water systems

Part 12—Mechanical ventilation and hot, warm and cooling water systems | 1 | Mechanical ventilation systems incorporating cooling tower systems (other than a system serving only a single sole-occupancy unit in a Class 2 or 3 building or a Class 4 part of a building) | | 2 | Mechanical ventilation systems incorporating hot and warm water systems (other than a system serving only a single sole-occupancy unit in a Class 2 or 3 building or a Class 4 part of a building) |