In-line duct booster fans can help improve airflow and distribute conditioned air in a duct system, which can potentially impact the temperature on a second story. However, their effectiveness in cooling or heating a second story depends on various factors and limitations.
In general, booster fans are designed to increase the airflow in a specific duct run where there may be inadequate airflow due to long distances, complex duct layouts, or other factors. By improving airflow, they can potentially enhance the distribution of cooled or heated air to areas that might have been underserved by the existing HVAC system.
When it comes to cooling or heating a second story, booster fans can help mitigate temperature differences by improving air circulation. They can assist in pushing conditioned air upstairs or pulling the warm air back down, thus facilitating a more balanced temperature distribution.
However, it is important to note that booster fans are not a universal solution for all airflow and temperature issues. Several factors can influence their effectiveness, including the design and capacity of the HVAC system, insulation levels, ductwork configuration, and overall HVAC system performance.
For optimal cooling or heating on a second story, it is advisable to ensure that the HVAC system is appropriately sized for the space, the ductwork is properly designed and balanced, and any underlying insulation or sealing issues are addressed. Consulting with a professional HVAC technician or engineer can help determine the best approach for improving temperature control and airflow to a second story.