https://www.bltdirect.com/400-watt-frost-protection-convector-heater?adcid=brandseterna&gclid=EAIaIQobChMIobHcw7734QIVTLvtCh3sCQvSEAAYASAAEgJqk_D_BwE
Ref. ETERNA Model FPH400 Frost Protection Heater. 400-450 Watts. Wall Mounting.
This thermostatic heater has metal front and back panels. The ends are made of a plastic material which is vented at the top and bottom parts.
If partially covered, as the one that I have seen was, the plastic will become very very brittle and will decompose and crumble allowing a small hand to be able to enter the heater and touch live parts. This could happen if the heater is accidentally covered by a curtain or discarded item of clothing etc. A curtain covered only a small part of the top of one plastic end moulding, not the whole top, and the end plastic moulding top fell away like so much brittle powdery seaside rock. It just turned to dust.
Z.