CVF3含有一个5 W和一个10 W的加热器。5 W加热器用于轻微加热穹顶的温度，比环境温度稍高，以防止露水和霜的生成。10 W加热器用于极端气候，熔化雪和冰。
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
The 27084 mounting stand is used to fasten the CVF3 to a CM220 Right-Angle Mounting Bracket or a 17953 1 in. by 1 in. NU-RAIL. The CM220 or 17953 is then attached to a mast or crossarm. The CVF3 is not compatible with the CM245 mounting stand.
The 10 W heater’s current drain is approximately 850 mA at 12 Vdc, and the 5 W heater’s current drain is approximately 420 mA at 12 Vdc. The ventilator draws an additional 5 W of power at 12 Vdc. These power requirements are large compared to most Campbell Scientific products. Because of this, the CVF3 should be connected to the 21326 Power Net 5 A Power Supply and the 7321 Crydom Relay.
The Crydom relay allows the heater power to be controlled by the data logger program and thus reducing power consumption. For example, the data logger program can turn on the heater only when the light level falls below 20 W/m2 or, if a measurement of air humidity is available, when the dew point of the air falls to within 1ºC of the sensor body temperature.