diff --git a/api/runtime_thermostat_summary.php b/api/runtime_thermostat_summary.php
index e37adee..3036595 100755
--- a/api/runtime_thermostat_summary.php
+++ b/api/runtime_thermostat_summary.php
@@ -247,7 +247,7 @@ class runtime_thermostat_summary extends cora\crud {
             'sum_dehumidifier' => 0,
             'sum_ventilator' => 0,
             'sum_economizer' => 0,
-            'sum_degree_days' => [],
+            // 'sum_degree_days' => [],
             'avg_outdoor_temperature' => [],
             'avg_outdoor_humidity' => [],
             'avg_indoor_temperature' => [],
@@ -285,7 +285,7 @@ class runtime_thermostat_summary extends cora\crud {
 
         if ($runtime_thermostat['outdoor_temperature'] !== null) {
           $data[$date]['avg_outdoor_temperature'][] = $runtime_thermostat['outdoor_temperature'];
-          $data[$date]['sum_degree_days'][] = $runtime_thermostat['outdoor_temperature'];
+          // $data[$date]['sum_degree_days'][] = $runtime_thermostat['outdoor_temperature'];
         }
         if ($runtime_thermostat['outdoor_humidity'] !== null) {
           $data[$date]['avg_outdoor_humidity'][] = $runtime_thermostat['outdoor_humidity'];
@@ -300,7 +300,7 @@ class runtime_thermostat_summary extends cora\crud {
 
     // Write to the database.
     foreach($data as $date => &$row) {
-      $row['sum_degree_days'] = (array_mean($row['sum_degree_days']) / 10) - $degree_days_base_temperature;
+      // $row['sum_degree_days'] = (array_mean($row['sum_degree_days']) / 10) - $degree_days_base_temperature;
       $row['avg_outdoor_temperature'] = round(array_sum($row['avg_outdoor_temperature']) / count($row['avg_outdoor_temperature']));
       $row['avg_outdoor_humidity'] = round(array_sum($row['avg_outdoor_humidity']) / count($row['avg_outdoor_humidity']));
       $row['avg_indoor_temperature'] = round(array_sum($row['avg_indoor_temperature']) / count($row['avg_indoor_temperature']));