Case
Studies

We recommended that a single large ACR 160.120 AHU be located on and flat roof adjacent to the plant room. Flexible ductwork could then be run away from the unit into the plant room and extended as required. Finally, the clients contractors would complete the connections to the plant as required.

For efficient operation, a plate heat exchanger system was recommended to heat the air. This utilises a water/glycol mixture which is pumped through the AHU’s heater batteries and the exchanger.

The primary side was fed from the clients LTHW system. This isolates the primary from the secondary sides- advantages include, more stable temperature control and frost protection afforded by the glycol mix. A tank is fitted to give head for pumping and to stabilise the temperature in the system.

All in all, we have found this a very effective way of heating our AHU’s.