Bakery halls normally have ovens installed in it .Special attention needs to be given for ventilation in the baking hall . Roof are designed in such a way that it helps in natural ventilation. The temperatures in these halls touches 50- 55 deg c in summer in some places which makes condition difficult for bakers and operators to work in these condition .
Normally bigger plants with more than two or three units placed in the same hall s have more problem than a single unit . Ensure that the roof height are something between 30 - 35 ft from the ground level and have ample space for heat to disperse .Following methods are used to for ventilation
Forced Ventilation Axial fans are installed at the roof with capacities matching the hall dimensions .fans are installed in the walls as well roof supported on the trusses and wall . structure needs to be erected for installation , repair and dismantling of these fans .This methods consume more energy as axial fans are drive by motors .
Natural ventilation Roof are designed such a way that it helps natural ventilation . series of wire mesh is fixed in the entire length which allows hot air to escape through it and preventing dust other foreign bodies to go inside the hall . fans can be installed which can use the hot airs to run itself hence creating draft for air to escape to the atmosphere through roof .