Agile Modulator on 24/7, Is it safe?

[compucat]

I recently purchased and set up a Blonder Tongue AM40 agile modulator connected to a DTV coverter so I can use my Sony Watchman and other small televisions. I have the modulator broadcasting on channel five. I leave this set up on continuously so I can use my handheld tv anytime without having to do anything but turn on my Watchman. The modulator runs very hot which I already knew they do. My concern is that this is a very hot unit, especially on the right side of it where I expect several high power components are located. I put some feet on the bottom of it to allow air flow underneath. The surrounding area where I have it located is not getting hot but I wonder how safe is it to leave this running all the time? Do any of you leave these running for a permanent analog home tv channel?