Fireboxes are available in a variety of different sizes and styles. Some are direct vent, others are vent-free. Some use naturally refractive materials to help create more radiant heat, others provide a more decorative element to the home's decor.
Whatever direction you decide to take, though, make sure that you are buying a quality product like the one pictured here. If this firebox meets the needs of your home or building project, then the Superior Universal 36 Inch Vent-Free Smooth Face See-Through Firebox is the perfect choice for you.