A. Castle is the oldest stove manufacturer in the USA and perhaps the world. We insulate the sides of our ranges to reduce the clearance from combustible materials.
Castle makes 3 widths of ovens for their ranges, 19 1/2 ", 26 1/2 " and 31 1/2 ". The 31 1/2 " oven is the widest in the industry. The extra space allows for air to circulate around the sides of a full size sheet pan reducing the scorching that can sometimes occurs in some 26 1/2 " ovens when full size sheet pans are used.
Castle also offers more top configurations than any other range manufacturer. On open top burners we use an energy efficient 24,000 BTU rated star burner that spreads heat evenly to small or large pots. This energy efficient pattern allows a lower BTU burner to produce the same cooking results as a higher BTU rated ring or octagon pattern burner reducing energy consumption without sacrificing performance. While many users want the full 24,000 BTU rating on the open top burners some find they do not need that much for every burner for home cooking. Castle will reduce the BTU rating on any of its open burners to 15,000 or more at no charge. Lowering the BTU rating will reduce the cfm required by the exhaust system and save on utility costs.
Considering the cost of "Commercial-Type" residential ranges versus the cost of a real commercial range, the savings can easily pay for proper commercial installation with savings to spare as well as getting the cooking performance and durability of a real commercial range.
The most important consideration is to keep in mind is a commercial stove must be installed according to local commercial building code. Comstock-Castle Stove Company can not tell you what the code is in your area. You should research this with a competent professional in your area.