The Arte range is one of Spartherm's most popular ranges of fireboxes. It includes single-sided, corner, tunnel and triangular fireboxes in a wide range of sizes. 

The side and rear walls of the Spartherm Arte 2LRh-66-4S-2 firebox are covered with radiators (special ribs) to increase heat output. Firebox dimensions: overall width: 474 mm, front width: 413 mm, depth: 474 mm, height: 1604 mm. Furnace door size: (363+363)x663 mm. Door opening type: guillotine.  The inner walls of the combustion chamber of the firebox are lined with chamotte, which has a positive effect on the efficiency and combustion temperature.

Fireplace firebox Spartherm Arte 2LR-66- 4S-2 is made of 4/5 mm thick steel with anti-corrosion coating. Door with increased height and reduced width, which opens upwards. Fireclay brick inside the firebox increases the temperature in the firebox, accumulates this heat during the operation of the firebox, and radiates it for a long time after the end of the combustion process.

The firebox has a long burning system and a clean glass system. It is possible to bring in additional air from other rooms or the street for the combustion process, which minimises the burning of oxygen in the room during the operation of the fireplace.

When operating the Linear fireplace firebox, one is once again convinced of the technological perfection of Spartherm products. Fastening of the frame to the rails, as well as the action of the mechanism itself, are maximally hidden from the user, which is an undeniable advantage, as a fireplace firebox should be not only an efficient heating device, but also an aesthetically perfect product. The 4S fireboxes utilise a 4-sided concealed glass fixing frame with a 4-sided paint frame all around the glass. The handle is located in the usual place, but its fixing is not quite usual - it is fixed at the bottom of the frame, which does not affect the convenience. All Linear fireboxes can be equipped with additional frames mounted on the front part of the firebox, in front of the door. These frames can also be either 3 or 4-sided. The frames are made of either black painted metal or high quality brushed stainless steel. The firebox has a long burning system and a clean glass system.