Add Font Awesome Icon in Avada Theme's Secondary Header

avada_add_font_awesome_secondary_header_filter.php

<?php

/**
 * Prototype for adding a Font Awesome icon to the secondary Avada header.
 * 
 * 1) Telephone
 * 2) Email
 * 
 * 1) For the telephone, add the HTML/CSS directly into the Theme Options > Header > Phone Number For Contact Info
 * E.g. Call Us Today! Call Us Today! <i class="fontawesome-icon fa-mug-hot fas circle-yes" style="border-color:#3e3e3e;background-color:#3e3e3e;font-size:15.84px;line-height:31.68px;height:31.68px;width:31.68px;margin-right:9px;color:#ffffff;"></i> 1.555.555.555 
 *
 * 2) For the email, use the filter hook below as an example. Add this to your 
 * child theme's functions.php file.
 */
function my_custom_head_function_for_avada( $email ) {
    $fa_icon_html = <<<EOT
<i class="fontawesome-icon fa-mug-hot fas circle-yes" style="border-color:#3e3e3e;background-color:#3e3e3e;font-size:15.84px;line-height:31.68px;height:31.68px;width:31.68px;margin-right:9px;color:#ffffff;"></i>
EOT;
    return $fa_icon_html . $email;
}
add_filter( 'avada_header_contact_info_email', 'my_custom_head_function_for_avada' );

Screen Grab