Custom search for floor plan

<?php
add_action('pre_get_posts', 'realty_dosearch');


/**
 *
 * Ejecuta la busqueda de propiedades
 */
function realty_dosearch()
{
    global $wp_query;

    // just search when is post type floor plan
    if ( $wp_query->query_vars['post_type'] != 'floor_plan' ) {
        return false;
    }

    // dont needed because you are sending the search to a custom post type page
    //$wp_query->query_vars['post_type'] = 'floor_plan';

    $bedrooms = get_query_var('bedrooms');

    if (!empty($area) && $area > 0) {
        $meta_query = array();

        $meta_query[] = array(
            'key'     => 'number_of_bedrooms',
            'value'   => $bedrooms,
            'compare' => '=',
            'type'    => 'NUMERIC'
        );

        $wp_query->query_vars['meta_query'] = $meta_query;
    }
}

// }}}
// {{{

add_filter('query_vars', 'realty_query_vars');

function realty_query_vars($query_vars)
{
    $query_vars[] = 'bedrooms';
    return $query_vars;
}