--- a/src/global.h	Tue Jul 05 14:31:39 2022 +0200
+++ b/src/global.h	Thu Jul 07 08:51:57 2022 +0200
@@ -35,6 +35,13 @@
 #define equip_tun_specific_heat	0.110
 #define MaltVolume		0.87	// l/kg 0.688 volgens internetbronnen, gemeten 0.874 l/kg, na enige tijd maischen 0,715 l/kg (A3 Otten).
 
+#define	Seapressure		1013.25		// Air pressure at sealevel in hPa
+#define	MolMassAir		0.0289644	// Air molair mass
+#define	Gravacc			9.80665		// Gravitational acceleration in m/s2
+#define	Gasconst		8.3144621	// Gas constant J K-1 mol-1
+#define Kelvin			273.15		// Kelvin to Celsius
+#define	EoVwater		40660		// Enthalpy of Vaporization (ΔH) for water
+
 extern QWebSocket *webSocket;
 
 struct Acid
@@ -667,6 +674,8 @@
 extern double		my_grain_absorbtion;
 extern int		my_default_water;
 extern QString		my_yeastlab;
+extern int		my_height;
+
 
 enum ProdStages {
 	PROD_STAGE_PLAN,