We have a smaller government project that does not have the need or budget for a building automation system, which we have used as the monitoring equipment for this credit previously. We are considering small, stand alone device(s) to monitor and alarm with a sampling interval of 15 minutes. It does not appear that the device needs to record, just monitor and alarm. Followup corrective action with short term trend loggers could be used to pursue the problem. Any successful experience with this approach?