Part (b) HEATING, COOLING AND VENTILATING
(i)
Water heaters.
(ii)
Headers and manifolds; steam pressure reducing valves; calorifiers; radiators; heating panels; hot-air furnaces with distributing ducts and gratings.
(iii)
Gas pressure regulators; gas burners; gas heaters and radiators and the flues and chimneys used in connection with any such equipment.
(iv)
Plug-sockets and other outlets; electric heaters.
(v)
Refrigerating machines.
(vi)
Water screens; water jets.
(vii)
Fans and blowers.
(viii)
Air intakes, channels, ducts, gratings, louvres and outlets.
(ix)
Plant for filtering, washing, drying, warming, cooling, humidifying, deodorising and perfuming, and for the chemical and bacteriological treatment of air.
(x)
Pipes and coils when used for causing or assisting air movement.