Taxonomy Drop Down with hierarchical view using $terms

<?php
// Equipment Category Dropdown, thanks http://frankiejarrett.com/2011/09/create-a-dropdown-of-custom-taxonomies-in-wordpress-the-easy-way/
function exc_custom_taxonomy_dropdown( $taxonomy, $orderby, $order, $hierarchical, $show_count,  $name) {
    $args = array(
        'orderby' => 'name',
        'order' => 'ASC',
        'hierarchical' => true,
        'show_count' => true,
    );
    $terms = get_terms( $taxonomy, $args );
    $name = ( $name ) ? $name : $taxonomy;
    if ( $terms ) {
        printf( '<select name="%s" class="postform">', $name );
        foreach ( $terms as $term ) {
            printf( '<option value="%s">%s (%s)</option>', $term->slug, $term->name, $term->count );
        }
        print( '</select>' );
    }
}
?>
<form role="search" method="get" id="equipfilter" action="<?php bloginfo('url'); ?>">
        <fieldset>
            <!--legend>Category:</legend-->
            <?php exc_custom_taxonomy_dropdown( 'exc_equipment_cat', 'name', 'ASC', true, true, 'exc_equipment_cat'); ?>
-       </fieldset>
        <fieldset>
            <legend>Kw Range:</legend>
            <input type="text" name="kw_min" placeholder="from" value><br />
            <input type="text" name="kw_max" placeholder="to" value>
        </fieldset>
        <fieldset>
            <legend>Price Range:</legend>
            <input type="text" name="pr_min" placeholder="from" value><br />
            <input type="text" name="pr_max" placeholder="to" value>
        </fieldset>
        <input type="submit" id="filtersubmit" value="Search" />
    </form>