Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
I've seen several people install fans next to the "swiveling spot lights" to each side of the mast post. Looks like a good spot for the V-berth as long as you remember to duck!
I have permanent silver dollar sized imprints on my head from those $(@^ lamps. I wouldn't put any other potential injuries near there. Since you're planning to permanently wire them in place, I think it might better to put a fan(or two) forward of the front hatch. Maybe on the bulkhead that is the anchor locker or at the forward end of the teak rails that the cover hull/deck joint. The wiring can be conveniently hidden buy the rail. You can switch them on from your circuit board and they will draw air in through the hatch with a Venturi effect. Or, should you choose to sit an A/C unit near the hatch (as discussed elsewhere, they'll help circulate the cooled air.
For the aft area, maybe mount one under a stair tread or just under the companionway.
I havre mine next to the bullet lights on either side of the mast post. Both are rotating option, and I have never hit my head on them, but I do hit my head on the part of the cabin roof where the stairs are.
If you sleep in the quarterberth, then you need one there. Otherwise there's just zero air circulation. Position it on the ceiling to the starboard side of the companionway steps. Your electrical panel is right there, so it's easy. The other fan, yes, is great beside the mast post. You can tie into the wires for the swivel ceiling lights.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.