How do you get several three storey Cornish beam engines, a collection of Grade I listed buildings and a whole network of steam infrastructure on the path towards net zero? This talk is the experience of a volunteer on the practical challenges met whilst helping the London Museum of Water and Steam with several major projects. Expect tales of reverse engineering boiler control system ladder logic, interfacing raspberryPis to 100psi steam lines and working out the water/gas/steam usage to run 200-year old steam water pumps.