In article , Uncle Marvo
writes
Did it have any ventilation? It is important that it does.

I think the window was open a little

It is possible for a build up of paraffin vapour to exist, especially if it
isn't burning properly.

My husband said that perhaps it wasn't burning properly

When the vapour and air mixture reaches a critical point you wouldn't want
to be there.

So what can one do to ensure that this doesn't happen again?

--
Judith Lea