An investigation into an explosion at a property in Buxton, Derbyshire, found that the blast was most likely caused by an aerosol can.
Two crews were called to reports of an explosion on Ash Street on Sunday (29 April).
When firefighters arrived on the scene, there was "significant structural damage" to the front of the two-storey house.
This damage was caused by the rupture of an aerosol canister that had been left on a wood burner, resulting in the ignition of the released gas.
The high-pressure within the property then caused the window to be blown out into the street.
The three occupants in the property were taken to hospital for precautionary checks.