--- a/thermferm/thermferm.h	Wed Oct 29 14:41:00 2014 +0100
+++ b/thermferm/thermferm.h	Wed Oct 29 20:27:37 2014 +0100
@@ -116,14 +116,17 @@
     int			heater_state;		/* Heater state 0..100		*/
     int			heater_delay;		/* Heater delay time /15 sec	*/
     int			heater_wait;		/* Heater wait counter		*/
+    int			heater_usage;		/* Heater usage in seconds	*/
     char		*cooler_address;	/* Cooler relay or PWM		*/
     int			cooler_state;		/* Cooler state 0..100		*/
     int			cooler_delay;		/* Cooler delay time /15 sec	*/
     int			cooler_wait;		/* Cooler wait counter		*/
+    int			cooler_usage;		/* Cooler usage in seconds	*/
     char		*fan_address;		/* Fan relay or PWM 		*/
     int			fan_state;		/* Fan state 0..100		*/
     int			fan_delay;		/* Fan delay time /15 sec	*/
     int			fan_wait;		/* Fan wait counter		*/
+    int			fan_usage;		/* Fan usage in seconds		*/
     char		*door_address;		/* Door input address		*/
     int			door_state;		/* Door and light status	*/
     int			mode;			/* Unit mode			*/