I see, and when recessed, how much gap or space is there around it in its cubby hole?
It's A new purpose made recesses CU in a stud wall so airflow around it
Ideally it would be better to leave it uncovered and unpainted.
A cover would prevent air circulation, and if made of combustible material could burn.
Paint, even emulsion, contains esters, these attack certain plastics, leading to early embrittlement.
@Trunkie started
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I see, and when recessed, how much gap or space is there around it in its cubby hole?