The heated tile is ideal for a BHP. They carry some huge ones at tile shops. A number of Aspidites keepers use heated tiles, often with a heat mat between two tiles. I find the heated shelf for my Darwins much more energy efficient than the ceramic emitters I have used. You don't lose all of that heat through the top of the enclosure and the snake can choose between belly heat (on the shelf) or back heat (branch underneath). Even though my enclosures can get down to 15 degrees or less away from the heat source in winter, the snakes are healthy and happy because they can bask as needed to heat up.
When I bought the large tile, they had a demonstration of under tile heating at Amber. The temperature felt just right for a snake to me. Do any tilers out there know if they have this system available in smaller patches like the little demo in the shop? It would be interesting to see if it is more cost effective than cord or heat mat, but those are both pretty cheap.