This spreadsheet allows the producer to determine minimum ventilation rates to control house moisture levels. The spreasheet determines the minimum ventilation rate required to remove the amount of moisture the birds are adding to the house based on the inside and outside conditions the user inputs. A target relative humidity of 60% is preset into the spreadsheet. The spreadsheet only determines a minimum ventilation rate to control moisture. The actual minimum ventilation rate to control ot...her air quality variables (i.e, carbon dioxide, ammonia, and carbon monoxide) may need to be higher. This is a "locked" spreadsheet so only the green cells can be changed. The file contains both english and metric unit worksheets.