I put a dark plastic window that passes the IR signals through to the inside. Apple fits iMacs with multiple internal microphones which are mixed through a Digital Signal Processor to get good noise reduction and clear output. This is more or less impossible to recreate in a DIY build, thou...
What I found is that in cooling mode, the Mr. Cool uses about 2600 watts on an ongoing basis (about the same as two large window air conditioners), which translates to 26 cents per hour of electricity. On the hottest days with the most people, I found the system ran about six hours,...