Commonly, the fireboxes will warp or crack from the fire's heat. Radiant fireplaces. The fireboxes of open fireplaces can be designed to increase the amount of radiant heat delivered to the room. Fireplace designs by Benjamin Thompson (aka Count Rumford) and later, Peter O. Rosin dominate this category.rue, a Rumford or Rosin puts out a lot of radiant heat, and true, the air pouring from the outlet grills of a heat form or a factory-built fireplace is very hot. But a sizable fraction of that heat loops through the room once and then flows right back into the firebox and up the chimney.
Knowing how to create strong focal points in art is a skill every artist should understand and be able to execute. Focal points refer to the areas of the artwork that demand the viewer's attention. Intelligent placement of focal points can positively affect the overall composition of the artwork.
Definition of focal for Students. 1  1 : of, relating to, or having a focus. 2  2 : having central or great importance She is a focal character in the story.