Similar to the fireplaces that are sold with either our mantles or TV stands, there are a few fireboxes that can be purchased separately. These include L-brackets, which allow them to be mounted from behind in a design of your choosing. Aside from mounting requirements, it is important that your custom frame or cabinet have enough space around the vents to prevent the fireplace from overheating. 1.5" of clearance is necessary above and behind the fireplace, as well as an inch on either side. The power cord attaches at the upper right side of the fireplace insert, and it is important that this has an unshared wall outlet for the power supply.