diff -r edb0b4da491a -r d74b56ae669e www-thermferm/units.php
--- a/www-thermferm/units.php	Sat Oct 25 21:16:25 2014 +0200
+++ b/www-thermferm/units.php	Wed Oct 29 14:36:53 2014 +0100
@@ -463,13 +463,13 @@
 	    if ($f[0] == "IDLE_RANGE_L") {
 		$outstr .= '       <tr class="editor">'.PHP_EOL;
 		$outstr .= '        <td class="editname">Idle Range Low</td>'.PHP_EOL;
-		$outstr .= '        <td class="editfield"><input type="text" name="IdleRangeL" size="5" value="'.$f[1].'"> &deg;C (Heater margin)</td>'.PHP_EOL;
+		$outstr .= '        <td class="editfield"><input type="text" name="IdleRangeL" size="5" value="'.$f[1].'"> &deg;C (Cooler margin)</td>'.PHP_EOL;
 		$outstr .= '       </tr>'.PHP_EOL;
 	    }
 	    if ($f[0] == "IDLE_RANGE_H") {
 		$outstr .= '       <tr class="editor">'.PHP_EOL;
 		$outstr .= '        <td class="editname">Idle Range High</td>'.PHP_EOL;
-		$outstr .= '        <td class="editfield"><input type="text" name="IdleRangeH" size="5" value="'.$f[1].'"> &deg;C (Cooler margin)</td>'.PHP_EOL;
+		$outstr .= '        <td class="editfield"><input type="text" name="IdleRangeH" size="5" value="'.$f[1].'"> &deg;C (Heater margin)</td>'.PHP_EOL;
 		$outstr .= '       </tr>'.PHP_EOL;
 	    }
 	    $i++;