14
THE GAS CIRCULATION SYSTEM
The fan units pick up the cooler incubator atmosphere which has been forced to the top of the incubator
and first passes it over the warm heaters. This warmer gas is now forced down the channel at the back of
the cabinet and passes under the bottom shelf of the incubator where it first meets the sachets of
Conditioner and then the sachets of Catalyst. The gas now gives up just sufficient of its heat to maintain
the required temperature before finding its way back to the top of the incubator due to the suctional force
of the fan.
