librenms-librenms/includes/html/graphs/sensor/cooling.inc.php

<?php

$scale_min = '0';

require 'includes/html/graphs/common.inc.php';

$rrd_options .= " COMMENT:'                         Last     Max\\n'";

$rrd_options .= " DEF:sensor=$rrd_filename:sensor:AVERAGE";
$rrd_options .= " LINE1.5:sensor#cc0000:'" . \LibreNMS\Data\Store\Rrd::fixedSafeDescr($sensor['sensor_descr'], 20) . "'";
$rrd_options .= ' GPRINT:sensor:LAST:%3.0lfW';
$rrd_options .= ' GPRINT:sensor:MAX:%3.0lfW\l';

if (is_numeric($sensor['sensor_limit'])) {
    $rrd_options .= ' HRULE:' . $sensor['sensor_limit'] . '#999999::dashes';
}

if (is_numeric($sensor['sensor_limit_low'])) {
    $rrd_options .= ' HRULE:' . $sensor['sensor_limit_low'] . '#999999::dashes';
}