diff --git a/src/simulation/elements/CO2.cpp b/src/simulation/elements/CO2.cpp
index bafebb014..08c38f2d8 100644
--- a/src/simulation/elements/CO2.cpp
+++ b/src/simulation/elements/CO2.cpp
@@ -17,7 +17,7 @@ Element_CO2::Element_CO2()
 	Gravity = 0.1f;
 	Diffusion = 1.0f;
 	HotAir = 0.000f	* CFDS;
-	Falldown = 1;
+	Falldown = 0;
 	
 	Flammable = 0;
 	Explosive = 0;
diff --git a/src/simulation/elements/FIRE.cpp b/src/simulation/elements/FIRE.cpp
index aea421773..e822a74e5 100644
--- a/src/simulation/elements/FIRE.cpp
+++ b/src/simulation/elements/FIRE.cpp
@@ -17,7 +17,7 @@ Element_FIRE::Element_FIRE()
 	Gravity = -0.1f;
 	Diffusion = 0.00f;
 	HotAir = 0.001f  * CFDS;
-	Falldown = 1;
+	Falldown = 0;
 	
 	Flammable = 0;
 	Explosive = 0;
diff --git a/src/simulation/elements/SMKE.cpp b/src/simulation/elements/SMKE.cpp
index 4a993a30a..1643c96df 100644
--- a/src/simulation/elements/SMKE.cpp
+++ b/src/simulation/elements/SMKE.cpp
@@ -17,7 +17,7 @@ Element_SMKE::Element_SMKE()
 	Gravity = -0.1f;
 	Diffusion = 0.00f;
 	HotAir = 0.001f	* CFDS;
-	Falldown = 1;
+	Falldown = 0;
 	
 	Flammable = 0;
 	Explosive = 0;