| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Smart thermostat - Internal Studies |  |  |  |  |  |
| 3 | Fuel | Sample Size | Pre-Nest Total Energy Use | Pre-Nest HVAC | Total Energy Savings | % of HVAC |
| 4 | Natural Gas (therms/yr) | 735 | 774 | 584 | 56 ±12 | 9.6 ±2.1% |
| 5 | 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.