I'm pretty sure this is the brand I have:
http://www.radiantsystemsinc.com/
They are sold by my local power supply company. They are very popular in all electric homes in my area and I ended up using a pair to heat the third stall of my garage.
My third stall is an addition done by a previous owner so there is an 18' partial dividing wall between it and the original two car. There is a Reznor NG forced air heater in the two stall side that is directed at the 7' opening between the stalls. It does a good job of heating the third stall but I eventually plan to built a sliding partition between the two sides so I'll want a bit of supplement heat in the third stall, hence the use of the cove heaters.
I hope that makes sense. I haven't built the sliding partition yet but I think the cove heaters will do a decent job. I'm not sure they'd be my first choice if I didn't already have that Reznor.
At any rate, if you need more details or clarification post back and I'll write more after I've had my coffee, lol.