Multi-purpose dry powder or Aqueous Film Forming Foam (AFFF) are probably the best choices. They are come in small enough sizes to be installed without making your home look like a factory and extinguish common domestic types of fire.

Something like a 2ltr AFF foam fire extinguisher or 2kg ABC powder would be best in our view.

You can if you want add a 2kg CO2 extinguisher near a major electrical hazard such as IT equipment, kitchen or electrical cupboard.

Benifit over foam or powder would be no mess (other than that the fire makes) but downside would be it's not rated for Class A (wood, paper, textile) fires which are common domestically.

If you are unsure please feel free to drop us a email

Locate the screw which holds the Euro cylinder (click link below for image of retaining screw)

Remove the retaining screw.

After removing the retaining screw put the key in the lock and turn it slightly to the left or right. Jiggle it a bit and pull gently. You should feel the cylinder release. You can then pull the euro out of the door.

Simply replace the cylinder, making sure the keys are inserted to make the cam flush, then replace fixing screw.

Photos of Euro Cylinder