"Nests have saved users billions of kWh of energy, an average of 10 to 12 percent on heating bills, and 15 percent on cooling."
Clearly, Google saw the value of a small upfront investment to that will yield long-term savings for the customers. The Salamander Reservoir offers a similar value proposition and can save energy by focusing heating efforts based upon the real-time data of the water temperature, which is much less volatile than air temperature. After all, who doesn't love energy savings especially when coupled with sustainability!