Yes its safe to install in a wooden housing as to be honest nearly all kitchen units and work tops are wooden so that's not a problem.
But there are restrictions on locations of units above it. There cannot be any unit directly above the hob under 600mm from the hob itself and there must be a gap of about 40mm away from the edge of the hob so the units above the hob don't over hang it.
But installing into a wooden housing unit isn't a problem.
If you need anymore info just get back to me.