A modern fireplace can be categorized as such because of the latest technology that facilitates its operation. A natural wood burning fireplace can be converted into a modern type ignited by natural gas, propane or electricity. There are also modern eco-friendly ventless fireplaces fueled by bio-ethanol which do not have any smoke emission. Bio-ethanol combustion produces heat together with a tiny amount of water vapor and steam. This method eliminates the need for a chimney or flue. Technologically advanced features and futuristic design make up a modern fireplace.
However, the designs on these doors are almost alike in such a way that they can all be described as "simple and elegant." And although these new simplistic designs would probably look good on modern fireplace designs, these may be incompatible with the rustic brick fireplaces. A masonry fireplace door would probably look better with a frame made to look like antique brass.