Cove heaters can be purchased online at The Home Depot, Grainger and Amazon as of 2015. The Home Depot carries the King Electric Brand, while Grainger has three models from Dayton Electric. Amazon carries the same two plus five other brands.
All three of these sources have product descriptions with exact specifications, including dimensions, electrical requirements and heat output. Only Amazon has any customer reviews at this time. Grainger offers live chat support for technical questions.
The Home Depot offers free shipping to the home or to a nearby store. Grainger offers shipping and Will-Call pick up. All cove heaters are priced above the $35 Amazon requires for free shipping for heaters sold by Amazon.