diff --git a/code/modules/atmospherics/machinery/components/unary_devices/passive_vent.dm b/code/modules/atmospherics/machinery/components/unary_devices/passive_vent.dm
index 70ae5280a55..9859058d731 100644
--- a/code/modules/atmospherics/machinery/components/unary_devices/passive_vent.dm
+++ b/code/modules/atmospherics/machinery/components/unary_devices/passive_vent.dm
@@ -23,6 +23,10 @@
 	if(!node)
 		return 0
 
+	var/turf/T = loc
+	if(T.density) //No, you should not be able to get free air from walls
+		return
+
 	var/datum/gas_mixture/environment = loc.return_air()
 
 	var/pressure_delta = air_contents.return_pressure() - environment.return_pressure()
diff --git a/code/modules/atmospherics/machinery/components/unary_devices/vent_pump.dm b/code/modules/atmospherics/machinery/components/unary_devices/vent_pump.dm
index 35e9a84e932..ce89e03b48a 100644
--- a/code/modules/atmospherics/machinery/components/unary_devices/vent_pump.dm
+++ b/code/modules/atmospherics/machinery/components/unary_devices/vent_pump.dm
@@ -130,6 +130,9 @@
 	..()
 	if(stat & (NOPOWER|BROKEN))
 		return FALSE
+	var/turf/T = loc
+	if(T.density) //No, you should not be able to get free air from walls
+		return
 	if(!node)
 		on = FALSE
 	//broadcast_status() // from now air alarm/control computer should request update purposely --rastaf0
diff --git a/code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm b/code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm
index d006ae874f3..577bdbdb625 100644
--- a/code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm
+++ b/code/modules/atmospherics/machinery/components/unary_devices/vent_scrubber.dm
@@ -196,6 +196,10 @@
 	if(stat & (NOPOWER|BROKEN))
 		return
 
+	var/turf/T = loc
+	if(T.density) //No, you should not be able to get free air from walls
+		return
+
 	if(!node)
 		on = 0