My 26x22x14 HT room has an equipment closet (12 x 8 x 10) with HVAC. So I actually keep the HT Closet (68F) a lot COLDER than the HT room (74F).
My Yamaha AVP/Amp, ATI Amp, and HTPC's and Servers are cold and dry.
The only 2 things I control in my HT Closet are my Yamaha AVP and HTPC.
I control the Yamaha 100% with the WiFi Remote Control App (AV Controller) on my iPad and Android Phone. This is for controlling the AVP and for Music Streaming from my Network to my Yamaha.
I control the HTPC with a Wireless USB keyboard-pad.