diff --git a/code/ATMOSPHERICS/components/unary/vent_scrubber.dm b/code/ATMOSPHERICS/components/unary/vent_scrubber.dm
index 4c386f44ec4..b0470df9330 100644
--- a/code/ATMOSPHERICS/components/unary/vent_scrubber.dm
+++ b/code/ATMOSPHERICS/components/unary/vent_scrubber.dm
@@ -18,6 +18,7 @@
 	var/scrub_CO2 = 1
 	var/scrub_Toxins = 0
 	var/scrub_N2O = 0
+	var/scrub_O2 = 0
 
 	var/volume_rate = 120
 	var/panic = 0 //is this scrubber panicked?
@@ -70,8 +71,9 @@
 				"scrubbing" = scrubbing,
 				"panic" = panic,
 				"filter_co2" = scrub_CO2,
-				"filter_toxins" = scrub_Toxins,
+				"filter_tox" = scrub_Toxins,
 				"filter_n2o" = scrub_N2O,
+				"filter_o2" = scrub_O2,
 				"sigtype" = "status"
 			)
 			if(!initial_loc.air_scrub_names[id_tag])
@@ -121,6 +123,9 @@
 				if(scrub_CO2)
 					filtered_out.carbon_dioxide = removed.carbon_dioxide
 					removed.carbon_dioxide = 0
+				if(scrub_O2)
+					filtered_out.oxygen = removed.oxygen
+					removed.oxygen = 0
 
 				if(removed.trace_gases.len>0)
 					for(var/datum/gas/trace_gas in removed.trace_gases)
@@ -217,6 +222,11 @@
 		if(signal.data["toggle_n2o_scrub"])
 			scrub_N2O = !scrub_N2O
 
+		if(signal.data["o2_scrub"] != null)
+			scrub_O2 = text2num(signal.data["o2_scrub"])
+		if(signal.data["toggle_o2_scrub"])
+			scrub_O2 = !scrub_O2
+
 		if(signal.data["init"] != null)
 			name = signal.data["init"]
 			return
diff --git a/code/WorkInProgress/Mini/atmos_control.dm b/code/WorkInProgress/Mini/atmos_control.dm
index adf81eefb87..c2ad6330ed6 100644
--- a/code/WorkInProgress/Mini/atmos_control.dm
+++ b/code/WorkInProgress/Mini/atmos_control.dm
@@ -188,6 +188,11 @@
 
 //copypasta from alarm code, changed to work with this without derping hard
 //---START COPYPASTA----
+/obj/machinery/computer/atmoscontrol/proc/fmtScrubberGasStatus(var/id_tag,var/code,var/list/data)
+	var/label=replacetext(uppertext(code),"2","<sub>2</sub>")
+	if(code=="tox")
+		label="Plasma"
+	return "<A href='?src=\ref[current];id_tag=[id_tag];command=[code]_scrub;val=[!data["filter_"+code]]' class='scrub[data["filter_"+code]]'>[label]</A>"
 
 /obj/machinery/computer/atmoscontrol/proc/return_controls()
 	var/output = ""//"<B>[alarm_zone] Air [name]</B><HR>"
@@ -279,12 +284,10 @@ siphoning
 					if(data["scrubbing"])
 						sensor_data += {"
 <B>Filtering:</B>
-Carbon Dioxide
-<A href='?src=\ref[src];alarm=\ref[current];id_tag=[id_tag];command=co2_scrub;val=[!data["filter_co2"]]'>[data["filter_co2"]?"on":"off"]</A>;
-Toxins
-<A href='?src=\ref[src];alarm=\ref[current];id_tag=[id_tag];command=tox_scrub;val=[!data["filter_toxins"]]'>[data["filter_toxins"]?"on":"off"]</A>;
-Nitrous Oxide
-<A href='?src=\ref[src];alarm=\ref[current];id_tag=[id_tag];command=n2o_scrub;val=[!data["filter_n2o"]]'>[data["filter_n2o"]?"on":"off"]</A>
+[fmtScrubberGasStatus(id_tag,"co2",data)],
+[fmtScrubberGasStatus(id_tag,"tox",data)],
+[fmtScrubberGasStatus(id_tag,"n2o",data)],
+[fmtScrubberGasStatus(id_tag,"o2",data)]
 <BR>
 "}
 					sensor_data += {"
@@ -315,6 +318,17 @@ Nitrous Oxide
 		if (AALARM_SCREEN_SENSORS)
 			output += {"
 <a href='?src=\ref[src];alarm=\ref[current];screen=[AALARM_SCREEN_MAIN]'>Main menu</a><br>
+<hr><br><b>Sensor presets:</b><br><i>(Note, this only sets sensors, air supplied to vents must still be changed.)</i><ul>"}
+			var/list/presets = list(
+				AALARM_PRESET_HUMAN   = "Human - Checks for Oxygen and Nitrogen",\
+				AALARM_PRESET_VOX   = "Vox - Checks for Nitrogen only",\
+				AALARM_PRESET_SERVER   = "Coldroom - For server rooms and freezers")
+			for(var/p=1;p<=presets.len;p++)
+				if (current.preset==p)
+					output += "<li><A href='?src=\ref[current];preset=[p]'><b>[presets[p]]</b></A> (selected)</li>"
+				else
+					output += "<li><A href='?src=\ref[current];preset=[p]'>[presets[p]]</A></li>"
+			output += {"</ul>
 <b>Alarm thresholds:</b><br>
 Partial pressure for gases
 <style>/* some CSS woodoo here. Does not work perfect in ie6 but who cares? */
diff --git a/code/game/machinery/alarm.dm b/code/game/machinery/alarm.dm
index 37c9b674cf3..f825b38175a 100644
--- a/code/game/machinery/alarm.dm
+++ b/code/game/machinery/alarm.dm
@@ -35,6 +35,10 @@
 #define AALARM_MODE_FILL		5 //emergency fill
 #define AALARM_MODE_OFF			6 //Shuts it all down.
 
+#define AALARM_PRESET_HUMAN     1 // Default
+#define AALARM_PRESET_VOX       2 // Support Vox
+#define AALARM_PRESET_SERVER    3 // Server Coldroom
+
 #define AALARM_SCREEN_MAIN		1
 #define AALARM_SCREEN_VENT		2
 #define AALARM_SCREEN_SCRUB		3
@@ -84,10 +88,12 @@
 	var/shorted = 0
 
 	var/mode = AALARM_MODE_SCRUBBING
+	var/preset = AALARM_PRESET_HUMAN
 	var/screen = AALARM_SCREEN_MAIN
 	var/area_uid
 	var/area/alarm_area
 	var/danger_level = 0
+	var/danger_averted_confidence=0
 	var/buildstage = 2 //2 is built, 1 is building, 0 is frame.
 
 	var/target_temperature = T0C+20
@@ -101,13 +107,37 @@
 /obj/machinery/alarm/server/New()
 	..()
 	req_access = list(access_rd, access_atmospherics, access_engine_equip)
-	TLV["oxygen"] =			list(-1.0, -1.0,-1.0,-1.0) // Partial pressure, kpa
-	TLV["carbon dioxide"] = list(-1.0, -1.0,   5,  10) // Partial pressure, kpa
+	preset = AALARM_PRESET_SERVER
+	apply_preset()
+
+
+/obj/machinery/alarm/vox/New()
+	..()
+	preset = AALARM_PRESET_VOX
+	apply_preset()
+
+/obj/machinery/alarm/proc/apply_preset()
+
+	TLV["oxygen"] =      list(16, 19, 135, 140) // Partial pressure, kpa
+	TLV["carbon dioxide"] = list(-1.0, -1.0, 5, 10) // Partial pressure, kpa
 	TLV["plasma"] =			list(-1.0, -1.0, 0.2, 0.5) // Partial pressure, kpa
 	TLV["other"] =			list(-1.0, -1.0, 0.5, 1.0) // Partial pressure, kpa
-	TLV["pressure"] =		list(0,ONE_ATMOSPHERE*0.10,ONE_ATMOSPHERE*1.40,ONE_ATMOSPHERE*1.60) /* kpa */
-	TLV["temperature"] =	list(20, 40, 140, 160) // K
-	target_temperature = 90
+	TLV["pressure"] =    list(ONE_ATMOSPHERE*0.80,ONE_ATMOSPHERE*0.90,ONE_ATMOSPHERE*1.10,ONE_ATMOSPHERE*1.20) /* kpa */
+	TLV["temperature"] =  list(T0C-26, T0C, T0C+40, T0C+66) // K
+	target_temperature = T0C+20
+	switch(preset)
+		if(AALARM_PRESET_VOX) // Same as usual, but without oxygen.
+			TLV["oxygen"] =      list(-1.0, -1.0, 5, 10) // Partial pressure, kpa
+		if(AALARM_PRESET_SERVER) // Cold as fuck.
+			TLV["oxygen"] =      list(-1.0, -1.0,-1.0,-1.0) // Partial pressure, kpa
+			TLV["carbon dioxide"] = list(-1.0, -1.0,   5,  10) // Partial pressure, kpa
+			TLV["plasma"] =      list(-1.0, -1.0, 0.2, 0.5) // Partial pressure, kpa
+			TLV["other"] =      list(-1.0, -1.0, 0.5, 1.0) // Partial pressure, kpa
+			TLV["pressure"] =    list(0,ONE_ATMOSPHERE*0.10,ONE_ATMOSPHERE*1.40,ONE_ATMOSPHERE*1.60) /* kpa */
+			TLV["temperature"] =  list(20, 40, 140, 160) // K
+			target_temperature = 90
+	mode = AALARM_MODE_CYCLE
+	apply_mode()
 
 
 /obj/machinery/alarm/New(var/loc, var/dir, var/building = 0)
@@ -204,9 +234,15 @@
 	var/old_level = danger_level
 	danger_level = overall_danger_level()
 
-	if (old_level != danger_level)
+	if(danger_level < old_level)
+		danger_averted_confidence++
+	// Only change danger level if:
+	// we're going up a level
+	// OR if we're going down a level and have sufficient confidence (prevents doors smashing open and closed).
+	if (old_level < danger_level || (danger_averted_confidence >= 5 && danger_level < old_level))
 		refresh_danger_level()
 		update_icon()
+		danger_averted_confidence=0 // Reset counter.
 
 	if (mode==AALARM_MODE_CYCLE && environment.return_pressure()<ONE_ATMOSPHERE*0.05)
 		mode=AALARM_MODE_FILL
@@ -225,7 +261,8 @@
 		if(RCON_YES)
 			remote_control = 1
 
-	updateDialog()
+	if(screen == AALARM_SCREEN_MAIN)
+		updateDialog()
 	return
 
 /obj/machinery/alarm/proc/overall_danger_level()
@@ -370,7 +407,7 @@
 	switch(mode)
 		if(AALARM_MODE_SCRUBBING)
 			for(var/device_id in alarm_area.air_scrub_names)
-				send_signal(device_id, list("power"= 1, "co2_scrub"= 1, "scrubbing"= 1, "panic_siphon"= 0) )
+				send_signal(device_id, list("power"= 1, "co2_scrub"= 1, "o2_scrub"=(preset==AALARM_PRESET_VOX), "scrubbing"= 1, "panic_siphon"= 0) )
 			for(var/device_id in alarm_area.air_vent_names)
 				send_signal(device_id, list("power"= 1, "checks"= 1, "set_external_pressure"= target_pressure) )
 
@@ -710,6 +747,8 @@
 .dl0 { color: green; }
 .dl1 { color: orange; }
 .dl2 { color: red; font-weght: bold;}
+.scrub1 { color: red; font-weight:bold; }
+.scrub0 { color: green; }
 </style>
 "}
 
@@ -790,6 +829,12 @@ Toxins: <span class='dl[plasma_dangerlevel]'>[plasma_percent]</span>%<br>
 
 	return dat
 
+/obj/machinery/alarm/proc/fmtScrubberGasStatus(var/id_tag,var/code,var/list/data)
+	var/label=replacetext(uppertext(code),"2","<sub>2</sub>")
+	if(code=="tox")
+		label="Plasma"
+	return "<A href='?src=\ref[src];id_tag=[id_tag];command=[code]_scrub;val=[!data["filter_"+code]]' class='scrub[data["filter_"+code]]'>[label]</A>"
+
 /obj/machinery/alarm/proc/return_controls()
 	var/output = ""//"<B>[alarm_zone] Air [name]</B><HR>"
 
@@ -876,12 +921,10 @@ siphoning
 					if(data["scrubbing"])
 						sensor_data += {"
 <B>Filtering:</B>
-Carbon Dioxide
-<A href='?src=\ref[src];id_tag=[id_tag];command=co2_scrub;val=[!data["filter_co2"]]'>[data["filter_co2"]?"on":"off"]</A>;
-Toxins
-<A href='?src=\ref[src];id_tag=[id_tag];command=tox_scrub;val=[!data["filter_toxins"]]'>[data["filter_toxins"]?"on":"off"]</A>;
-Nitrous Oxide
-<A href='?src=\ref[src];id_tag=[id_tag];command=n2o_scrub;val=[!data["filter_n2o"]]'>[data["filter_n2o"]?"on":"off"]</A>
+[fmtScrubberGasStatus(id_tag,"co2",data)],
+[fmtScrubberGasStatus(id_tag,"tox",data)],
+[fmtScrubberGasStatus(id_tag,"n2o",data)],
+[fmtScrubberGasStatus(id_tag,"o2",data)]
 <BR>
 "}
 					sensor_data += {"
@@ -895,7 +938,8 @@ Nitrous Oxide
 
 		if (AALARM_SCREEN_MODE)
 			output += "<a href='?src=\ref[src];screen=[AALARM_SCREEN_MAIN]'>Main menu</a><br><b>Air machinery mode for the area:</b><ul>"
-			var/list/modes = list(AALARM_MODE_SCRUBBING   = "Filtering - Scrubs out contaminants",\
+			var/list/modes = list(
+				AALARM_MODE_SCRUBBING   = "Filtering - Scrubs out contaminants",\
 				AALARM_MODE_REPLACEMENT = "<font color='blue'>Replace Air - Siphons out air while replacing</font>",\
 				AALARM_MODE_PANIC       = "<font color='red'>Panic - Siphons air out of the room</font>",\
 				AALARM_MODE_CYCLE       = "<font color='red'>Cycle - Siphons air before replacing</font>",\
@@ -911,6 +955,17 @@ Nitrous Oxide
 		if (AALARM_SCREEN_SENSORS)
 			output += {"
 <a href='?src=\ref[src];screen=[AALARM_SCREEN_MAIN]'>Main menu</a><br>
+<hr><br><b>Sensor presets:</b><br><i>(Note, this only sets sensors, air supplied to vents must still be changed.)</i><ul>"}
+			var/list/presets = list(
+				AALARM_PRESET_HUMAN   = "Human - Checks for Oxygen and Nitrogen",\
+				AALARM_PRESET_VOX   = "Vox - Checks for Nitrogen only",\
+				AALARM_PRESET_SERVER   = "Coldroom - For server rooms and freezers")
+			for(var/p=1;p<=presets.len;p++)
+				if (preset==p)
+					output += "<li><A href='?src=\ref[src];preset=[p]'><b>[presets[p]]</b></A> (selected)</li>"
+				else
+					output += "<li><A href='?src=\ref[src];preset=[p]'>[presets[p]]</A></li>"
+			output += {"</ul>
 <b>Alarm thresholds:</b><br>
 Partial pressure for gases
 <style>/* some CSS woodoo here. Does not work perfect in ie6 but who cares? */
@@ -921,8 +976,7 @@ table tr:first-child th:first-child { border: none;}
 .dl0 { color: green; }
 .dl1 { color: orange; }
 .dl2 { color: red; font-weght: bold;}
-</style>
-<table cellspacing=0>
+</style><table cellspacing=0>
 <TR><th></th><th class=dl2>min2</th><th class=dl1>min1</th><th class=dl1>max1</th><th class=dl2>max2</th></TR>
 "}
 			var/list/gases = list(
@@ -954,9 +1008,11 @@ table tr:first-child th:first-child { border: none;}
 	return output
 
 /obj/machinery/alarm/Topic(href, href_list)
+	var/changed=0
 
 	if(href_list["rcon"])
 		rcon_setting = text2num(href_list["rcon"])
+		changed=1
 
 	if ( (get_dist(src, usr) > 1 ))
 		if (!istype(usr, /mob/living/silicon))
@@ -978,10 +1034,12 @@ table tr:first-child th:first-child { border: none;}
 				"co2_scrub",
 				"tox_scrub",
 				"n2o_scrub",
+				"o2_scrub",
 				"panic_siphon",
 				"scrubbing")
 
 				send_signal(device_id, list(href_list["command"] = text2num(href_list["val"]) ) )
+				changed=1
 
 			if("set_threshold")
 				var/env = href_list["env"]
@@ -1032,30 +1090,43 @@ table tr:first-child th:first-child { border: none;}
 						selected[3] = selected[4]
 
 				apply_mode()
+				changed=1
 
 	if(href_list["screen"])
+		var/prevscreen=screen
 		screen = text2num(href_list["screen"])
-
+		changed=(prevscreen!=screen)
+/* Unused
 	if(href_list["atmos_unlock"])
 		switch(href_list["atmos_unlock"])
 			if("0")
 				air_doors_close(1)
 			if("1")
 				air_doors_open(1)
+			changed=1
+*/
 
 	if(href_list["atmos_alarm"])
 		if (alarm_area.atmosalert(2))
 			apply_danger_level(2)
 		update_icon()
+		changed=1
 
 	if(href_list["atmos_reset"])
 		if (alarm_area.atmosalert(0))
 			apply_danger_level(0)
 		update_icon()
+		changed=1
 
 	if(href_list["mode"])
 		mode = text2num(href_list["mode"])
 		apply_mode()
+		changed=1
+
+	if(href_list["preset"])
+		preset = text2num(href_list["preset"])
+		apply_preset()
+		changed=1
 
 	if(href_list["temperature"])
 		var/list/selected = TLV["temperature"]
@@ -1066,6 +1137,7 @@ table tr:first-child th:first-child { border: none;}
 			usr << "Temperature must be between [min_temperature]C and [max_temperature]C"
 		else
 			target_temperature = input_temperature + T0C
+		changed=1
 
 	if (href_list["AAlarmwires"])
 		var/t1 = text2num(href_list["AAlarmwires"])
@@ -1074,6 +1146,7 @@ table tr:first-child th:first-child { border: none;}
 			return
 		if (isWireColorCut(t1))
 			mend(t1)
+			changed=1
 		else
 			cut(t1)
 			if (AAlarmwires == 0)
@@ -1092,8 +1165,9 @@ table tr:first-child th:first-child { border: none;}
 			return
 		else
 			pulse(t1)
-
-	updateUsrDialog()
+		changed=1
+	if(changed)
+		updateUsrDialog()
 
 
 /obj/machinery/alarm/attackby(obj/item/W as obj, mob/user as mob)