Quote Originally Posted by joepythons
I have never used the cobra but was told they are a higher wattage so you would need a higher wattage capable stat.I hope this helps
Not true. Even the largest UTH uses only about 60-70 watts, and the cheapest of thermostats can handle that wattage. The high watt thermostats such as Johnson or Ranco are used for space heaters or a lot of UTHs.