There are some differences in energy consumption between crossflow fans and centrifugal fans. The following are their key differences:

1. Fan design: Crossflow fans generally use relatively low speeds and wider blades to produce stable cyclones. Relatively speaking, centrifugal fans generally use relatively high speeds and relatively small blades to produce larger air volume and air pressure. Because centrifugal fans must provide greater wind speeds, their functional losses are generally higher.

2. Air volume and air pressure: Crossflow fans generally produce relatively small air volume and relatively low air pressure, so under the premise of the same air volume, their energy consumption is lower. Centrifugal fans can produce larger air volume and higher air pressure. In order to achieve this requirement, their functional losses are generally higher.

3. Control method: The speed of crossflow fans can usually be controlled more flexibly to meet different air volume requirements. The speed adjustment of centrifugal fans is generally relatively difficult, and additional equipment such as variable frequency speed regulators must be used for control. According to precise speed control, crossflow fans can operate more efficiently and reduce energy consumption.

In general, cross-flow fans usually have relatively low power loss and are suitable for some small spaces and situations with slight ventilation requirements. Centrifugal fans generally have higher power loss because they need to provide greater air volume and pressure. They are suitable for large and medium-sized indoor spaces, where super-strong ventilation is required or where high wind pressure requirements are required. When making a specific choice, it should be evaluated and judged based on specific business needs, air volume requirements and energy consumption regulations.