Like many companies, we have a suspended ceiling in our London warehouse with a server room which has the air conditioning working 24-hours per day every day. With just a suspended ceiling, we wanted to find a way of adding additional insulation to our ceiling without it being a fire hazzard, such as using polystyrene.
We tried Firezero 600×600 panels https://www.buildingmaterials.co.uk/firezero-insulation-pad-600mm-x-600mm-x-100mm
These worked a treat and over a 24-hour period, the temperature had a measurable reduction in variability, as you can see from the charts and the standard deviation measure.
This ought to mean lower electric costs in the summer and gas in the winter, so we are extending this to cover all of our mezzanine areas now.