One crew from Beaconsfield attended a fire involving an external air conditioning unit at Sir William School, Beaconsfield.
Firefighters were initially unable to locate any signs of fire on arrival but, after liaising with onsite staff, discovered a fire affecting an external air conditioning unit attached to the building.
Crews used one hose reel jet and a dry powder extinguisher to extinguish the fire and prevent further spread, working in an offensive mode to protect the building.
Electricity to the affected unit was isolated, and firefighters remained on scene for around 30 minutes to ensure the area was safe