Warmup. The 3iE is a programmable thermostat that’s specifically designed for in-floor electric radiant-heated floors, allowing users to set programs to heat floors only when needed. Featuring a low profile and a sleek touchscreen, it is the only thermostat with active energy management, the company says, and automatically adjusts to changing conditions in each room and to the seasons. 888.927.6333. www.warmup.com.