Posted By Andrew Rushton Peter, The whole of our manufacturing facility (approx 80,000sqft) is refrigerated and there are number of blast chill rooms and a freezer. The primary protection throughout our facility is rock wool panel construction and detection systems, along with the customary extinguishers. If you are installing detection systems make sure the alarm company knows what they are doing. Due to the environmental conditions within a refrigerated atmosphere we have had lots of problems with false alarms caused by the sensors. Andrew