Qmark MUH electric unit heaters can be mounted horizontally or vertically, with the optional mounting bracket. The fan delay will eliminate cold drafts during startup. Element heats up before fan cuts in, then fan continues to distribute heat after element shuts off. With its advanced pull-through air flow design draws air across heating element for more even air distribution and cooler element operation.  The MUH is great for insulated work shops, garage or basements.