Quote:
Originally Posted by xelasnave
imaging thru a glass sheet would effect things
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Terribly badly.
If you have a thermal problem I'll suggest this is much better...In this case it's damn cold outside, you have the reverse.
A company that makes cabinets for industrial control systems could knock one up for much less than what you'll spend doing what you describe - its basically a cabinet for 19" rackmount electronics with door, with a few windows added and the internal rack removed.
To that add some insulation inside, strap on an air conditioner and you'd be cool as a cucumber

This particular little number happened to be portable as it also fitted neatly in a box trailer. Details
http://www.volnaengineering.com/tardis2-1.php
What's more you COULD cannibalise a PortaLoo for the same purpose - has a door, fan-forced ventilation, readymade seat, and will save you a trip to the bathroom in the middle of a session. Wife will be wondering WTF you are doing in there !