Power supply location

Hi all,

I'm looking at installing a Hikvision 2142 camera and have a question about power supplies. I plan on having the psu under the floor ideally as i can't see any other solution, now a wallwort type will be no use for this, there is a Haydon psu much like a laptop psu but i feel this would generate too much heat being on 24/7 so i was wondering about an embedded encapsulated linear psu from RS (774-8213) which could be screwed to the joists. Would like to hear people thoughts or recommendations as i'm sure most don't have there cameras plugged into a socket or use a wall mount setup.

Thanks