WarmWire is the most flexible choice for irregularly-shaped or curved rooms and stairs. For typical installations, WarmWire is spaced at 3 inches on center. For areas with high heat loss, the spacing can be lowered to 2.5 inches for added warmth. In hallways and rooms that are well insulated, spacing can be increased to 3.5 inches on center. Controlling the level of warmth is easily accomplished with a connected SunStat Thermostat.