The noise and vibration of the crossflow fan may have a certain impact on the energy efficiency inside the oven. Here are some possible effects of noise and vibration on the energy efficiency inside the oven:

1. Cooling effect: Noise and vibration may affect the cooling effect of the crossflow fan, which in turn affects the energy efficiency. If the noise and vibration cause the fan to operate erratically or the air volume is affected, the circulation of hot air may be blocked or uneven, resulting in reduced cooling effect. This may cause the temperature inside the oven to rise, requiring longer time and more energy to reach the desired temperature, thereby reducing energy efficiency.

2. Energy loss: Noise and vibration may cause the oven or crossflow fan to partially or completely lose its seal, causing energy loss. Leaking hot air or entering cold air may cause the temperature inside the oven to be unstable, requiring additional energy to maintain the desired temperature. This increases energy consumption and reduces energy efficiency.

3. Increased power consumption: If noise and vibration cause the crossflow fan to be less efficient, the fan may require more electricity to provide the required air volume and wind speed. This results in additional energy consumption and reduces energy efficiency.

It should be noted that the impact of noise and vibration on the energy efficiency inside the oven is usually relatively small. Ovens are usually insulated and designed to reduce the effects of noise and vibration and provide more efficient energy use. However, when choosing an oven, you can consider choosing a reliable crossflow fan with low noise and vibration to ensure better energy efficiency. At the same time, regular maintenance and servicing, and timely handling of any abnormal noise and vibration issues, can also help improve the energy efficiency of the oven.