Does anyone know of any free HVAC load calculator software? I am at an industrial plant and have a 70 ton York chiller that outputs 46 degree air into a room with product. I am trying to keep this room below 50 degrees at all times but the best I can seem to do is 55 room temp. I have all of the AHU coil and fan specs along with the chiller but just not sure what the heat load of the room is.