A simple fireplace reflector is a stainless steel sheet held vertical to your fireplace floor by metal fireback supports. It is placed between your fire and the back wall of your fireplace. An important consideration is fitting the fireplace reflector to the size of the back wall of the fireplace so the maximum heat will be reflected out into the room.
The most reflective metals in the world are silver...Reflective aluminum or "lighting sheet" has a mirror like surface and is made from high purity aluminum with specifi BrightWhite™ reflectors are available as a film, tape, or laminated to metal. They are easily and cleanly cut using laser, die, shear, or blade cutters. Shapes can be created with standard thermoforming techniques to line the interior surfaces of luminaires.