Merge pull request #14268 from rmcdermo/master

FDS Tech Guide: use vector duct fan image

Author: rmcdermo

Manuals/FDS_Technical_Reference_Guide/FIGURES/Compartment_duct_fan.pdf

@@ -192,7 +192,7 @@ \section{Fan Curves}
 
 \begin{figure}[ht!]
    \begin{center}
-      \scalebox{0.8}{\includegraphics{FIGURES/HVAC_ductrun}}
+      \scalebox{0.8}{\includegraphics[width=\textwidth]{FIGURES/Compartment_duct_fan}}
       \caption[Illustration of determining duct runs]{\label{HVAC_ductrun} Illustration determining duct runs. Left side has a single duct run. Right side has two duct runs.}
    \end{center}
 \end{figure}