| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | retrofit | United States | Retrofitting older homes with modern energy-efficient features is common to improve sustainability and reduce energy costs. | 1 |
| 2 | retrofit | United States | Common practice in the US to retrofit old buildings to improve energy efficiency and modernize infrastructure | 1 |
| 3 | retrofit | United States | Retrofitting older buildings for energy efficiency is a common practice in North America to reduce utility costs and environmental impact. | 1 |
| 4 | retrofit | United States | Retrofitting older buildings with modern energy-efficient systems is a common practice to reduce utility costs and environmental impact. | 1 |
| 5 | retrofit | United States | Common practice in construction and engineering industries to upgrade older buildings or systems with modern technology or features. | 1 |