The recommended calibration for building airtightness measuring devices should follow the manufacturers recommendation as well as the governing body or standard being adhered to.

The recommended calibration for building airtightness measuring devices depends on the manufacturer's specifications. It is typically recommended to follow the calibration interval specified by the manufacturer, which is usually every 5 years. In addition, annual field calibration checks should be performed following the guidelines outlined in the manufacturer's blower door manual. The fan should retain its calibration as long as it has not been physically damaged, such as being dropped or fallen over. Manufacturers' manuals also provide guidance on checking the placement of the flow sensor or nacelle in the fan to ensure that it has not been moved since its original manufacture.

In some instances local, regional or national standards bodies will have differing recommendations to adhere to. This should be taken into consideration for calibration timelines.

In addition to the fan, it is also essential to consider the calibration of the digital pressure gauge. Typically, these devices should also follow the manufacturer's recommended calibration interval, which can vary from every 1, 3, or 5 years, depending on the device. It is important to reference the calibration requirements of the standard you are testing, in order to ensure accuracy. Field checks of the device should also be conducted by following the guidelines in the manufacturer's manual. Cross-checking the device with another recently calibrated gauge is also a recommended practice to ensure accuracy. 

Furthermore, it is crucial to verify that the calibration facility holds the proper accredited scope to perform the calibration work. An ISO-17025 accredited lab is normal for calibrations in the air-tightness industry. This ensures that the calibration is performed to the highest standards and that the results are reliable and accurate.

Posted in: Building Airtightness