% reductions 3 CO 2 concentration 3 CO 2 emission 3 CO2 concentration 3 CO2 emission 3 Carbon dioxide 3 Forecasting 3 Neural network predictions 3 Neural-networks 3 Post weaning cycle 3 R value 3 Set-point temperatures Ventilation 3 Ventilation flow 3 Weaned piglet 3 Well testing 3 neural network 3 post weaning cycle 3 weaned piglets 3