Estimate components of heating system for composite curing oven.

A curing oven for composite production has been designed with the following internal dimensions : 5000 mm (L) X 3000 mm (W) 2700 mm (h). It is insulated with rock-wool 200 mm in walls and ceiling, and 100 mm foam-glass in the floor. The task is to calculate the required capacity of the electrical heating system. It shall consist of circulation system and a heating system working together to maintain stable temperature between 20 and 160 C (+/- 2,5 C) within the working volume of the oven. Further tasks may be defined as design progresses.