Facets can be added to the default search page. Starting in version 1.7.0, we simply need to add a CSS class to search.php to tell FacetWP which listing to use.
1. Add the CSS class “facetwp-template” to the container element surrounding your WordPress Loop
The following uses the TwentyFourteen theme as an example, but a similar approach could be used for any theme.
2. Add facets
Simply add some facets to the search page. The easiest way would be to add facet shortcodes into Text widgets (Appearance > Widgets).