| The direct ventilative cooling may be provided by either a natural ventilation system or a fan-powered economizer system. |
| Robert Stirling applied for his first patents for this engine and the economizer in 1816, only after a few months of getting nominated as a minister at the Church of Scotland. |
| The solution is an economizer that adds a second control which works in harmony with the outdoor thermostat and measures the outdoor air humidity. |
| Efficient motors, variable speed drives and economizer cycles all can be used to minimize energy consumption. |
| Install economizer controls on the central air handling system to use outdoor air to replace refrigerated cooling when appropriate. |
| In ministerial posts under Aberdeen and Palmerston, including colonial secretary, he stood out as an administrative reformer and economizer. |
