Smart thermostat
Internal Studies

Fuel
Sample Size
Pre-Nest Total Energy Use
Pre-Nest HVAC
Total Energy Savings
% of HVAC
Natural Gas (therms/yr)
735
774
584
56 ±12
9.6 ±2.1%
Electricity (kWh/yr)
624
12,355
3,351
585 ±97
17.5 ±2.9%

Question: What was the sample size of homes for Smart Thermostat fuel usage analysis?
Answer: The study had a sample size of 735 homes for natural gas usage analysis and 624 homes for electrical analysis.