Firefighters were called to Wycombe Abbey School, Marlow Hill, High Wycombe early on the morning of Tuesday 17th June 2014 following reports of smoke coming from a boiler.
Three fire appliances were despatched from High Wycombe fire station at 5.45am. Another attended from Beaconsfield fire station.
The boiler was isolated and a thermal imaging camera used during the operation.
The school block was evacuated safely before the fire fighters arrived.