[time-nuts] Temp/Humidity control systems?

[John Ackermann N8UR]

I may have the opportunity to build a small "clock room" and am 
considering whether I could make it an environmentally controlled space. 
  I'd like to learn about the options for doing this.

The space would probably be 6x8 feet or so, in a basement with one 
outside wall.

Can anyone point me to purveyors of the hardware to do something like 
this?  Because I'll have a limited time to build this, I'm looking for 
something that uses more-or-less off the shelf gear, and not a whole lot 
of custom engineering.

Thanks!
John