I wouldn't/don`t locate electronics in a environment that I wouldn`t be comfortable in. Cold temperatures, usually no problem. Heat, well.. What`s the issue with locating the XMTR in the house ? If you keep the power output low(less than a watt), you probably can even use a tack on the wall over the counter FM folded dipole. My first Ramsey (not the FM100B) drove a old back of the set twin rabbit ears from some old portable TV that I attached to a metal peanut can`s lid with some weight added to the can for stability, and I then adjusted the length and orientation of the telescoping rods for best received signal at the desired location`s receiver 50 ft. away. Of course, in my case, with no wife, I didn`t care what it looked like placed on my A/V rack, until I purchased the Ramsey FM 100B later on, and went with their outside PVC antenna, but both XMTR`s always lived inside on top of my A/V rack close to the FM XMTR`s audio input source. if I am comfortable temperature wise, so will be my electronics.