air change for glove curing oven

Hi,

I am studying on ovens used to dry and cure gloves in glove manufacturing plant.

The ovens are divided into direct fired and indirect fired type.
Direct fire--infrared gas burner is used
indirect fire-steam or thermal oil is used with heat exchanger

So can any experts out there tell me what is the standard air change that we will use normally for the indirect type to size the blower fan capacity,cfm?

How many air change per minuted or per hour?

TQVM