diff --git a/code/__DEFINES/access.dm b/code/__DEFINES/access.dm
index bebeef0f542d..d4937a7c9a44 100644
--- a/code/__DEFINES/access.dm
+++ b/code/__DEFINES/access.dm
@@ -58,6 +58,8 @@
 #define ACCESS_MAINT_TUNNELS "maint_tunnels"
 /// Access to get into APCs, engineering equipment lockers, typically mapped in for key power rooms across the station, engineering vending machines, emitters, and some other stuff.
 #define ACCESS_ENGINE_EQUIP "engine_equip"
+/// Access to get into air alarms, atmos equipment lockers, potentially atmos storage rooms (like the gas storage room).
+#define ACCESS_ATMOS_EQUIP "atmos_equip"
 /// Access to "construction" areas of the station. However, in mapping, it's used to get access to the front door and lathe room of the engineering department.
 #define ACCESS_CONSTRUCTION "construction"
 /// Access to the technical storage room (contains all the boards and other miscellaneous engineering gear).
@@ -286,6 +288,7 @@
 /// Departmental/general/common area accesses. Do not use direct, access via SSid_access.get_flag_access_list(ACCESS_FLAG_COMMON)
 #define COMMON_ACCESS list( \
 	ACCESS_ATMOSPHERICS, \
+	ACCESS_ATMOS_EQUIP, \
 	ACCESS_AUX_BASE, \
 	ACCESS_BAR, \
 	ACCESS_BIT_DEN, \
@@ -483,6 +486,7 @@
 /// Used to seed the accesses_by_region list in SSid_access. A list of all engineering regional accesses that are overseen by the CE.
 #define REGION_ACCESS_ENGINEERING list( \
 	ACCESS_ATMOSPHERICS, \
+	ACCESS_ATMOS_EQUIP, \
 	ACCESS_AUX_BASE, \
 	ACCESS_CE, \
 	ACCESS_CONSTRUCTION, \
diff --git a/code/controllers/subsystem/id_access.dm b/code/controllers/subsystem/id_access.dm
index 8fe9cc0df159..ebe14b86f6b4 100644
--- a/code/controllers/subsystem/id_access.dm
+++ b/code/controllers/subsystem/id_access.dm
@@ -279,6 +279,7 @@ SUBSYSTEM_DEF(id_access)
 	desc_by_access["[ACCESS_CHAPEL_OFFICE]"] = "Chapel Office"
 	desc_by_access["[ACCESS_TECH_STORAGE]"] = "Technical Storage"
 	desc_by_access["[ACCESS_ATMOSPHERICS]"] = "Atmospherics"
+	desc_by_access["[ACCESS_ATMOS_EQUIP]"] = "Atmospherics Equipment"
 	desc_by_access["[ACCESS_CREMATORIUM]"] = "Crematorium"
 	desc_by_access["[ACCESS_ARMORY]"] = "Armory"
 	desc_by_access["[ACCESS_CONSTRUCTION]"] = "Construction"
diff --git a/code/datums/id_trim/jobs.dm b/code/datums/id_trim/jobs.dm
index 9865ede38073..2f4b7fc9ce2d 100644
--- a/code/datums/id_trim/jobs.dm
+++ b/code/datums/id_trim/jobs.dm
@@ -111,6 +111,7 @@
 	sechud_icon_state = SECHUD_ATMOSPHERIC_TECHNICIAN
 	minimal_access = list(
 		ACCESS_ATMOSPHERICS,
+		ACCESS_ATMOS_EQUIP,
 		ACCESS_AUX_BASE,
 		ACCESS_CONSTRUCTION,
 		ACCESS_ENGINEERING,
@@ -346,6 +347,7 @@
 	extra_wildcard_access = list()
 	minimal_access = list(
 		ACCESS_ATMOSPHERICS,
+		ACCESS_ATMOS_EQUIP,
 		ACCESS_AUX_BASE,
 		ACCESS_BRIG_ENTRANCE,
 		ACCESS_CE,
@@ -1159,6 +1161,7 @@
 		ACCESS_ENGINEERING,
 	)
 	elevated_access = list(
+		ACCESS_ATMOS_EQUIP,
 		ACCESS_AUX_BASE,
 		ACCESS_CONSTRUCTION,
 		ACCESS_ENGINE_EQUIP,
@@ -1241,6 +1244,7 @@
 	sechud_icon_state = SECHUD_STATION_ENGINEER
 	minimal_access = list(
 		ACCESS_AUX_BASE,
+		ACCESS_ATMOS_EQUIP,
 		ACCESS_CONSTRUCTION,
 		ACCESS_ENGINEERING,
 		ACCESS_ENGINE_EQUIP,
diff --git a/code/game/machinery/buttons.dm b/code/game/machinery/buttons.dm
index a08e3faa9abf..2f7e3236b49c 100644
--- a/code/game/machinery/buttons.dm
+++ b/code/game/machinery/buttons.dm
@@ -423,22 +423,22 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/button/door, 24)
 /obj/machinery/button/door/incinerator_vent_atmos_main
 	name = "turbine vent control"
 	id = INCINERATOR_ATMOS_MAINVENT
-	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_MAINT_TUNNELS)
+	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_ATMOS_EQUIP, ACCESS_MAINT_TUNNELS)
 
 /obj/machinery/button/door/incinerator_vent_atmos_aux
 	name = "combustion chamber vent control"
 	id = INCINERATOR_ATMOS_AUXVENT
-	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_MAINT_TUNNELS)
+	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_ATMOS_EQUIP, ACCESS_MAINT_TUNNELS)
 
 /obj/machinery/button/door/atmos_test_room_mainvent_1
 	name = "test chamber 1 vent control"
 	id = TEST_ROOM_ATMOS_MAINVENT_1
-	req_one_access = list(ACCESS_ATMOSPHERICS)
+	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_ATMOS_EQUIP)
 
 /obj/machinery/button/door/atmos_test_room_mainvent_2
 	name = "test chamber 2 vent control"
 	id = TEST_ROOM_ATMOS_MAINVENT_2
-	req_one_access = list(ACCESS_ATMOSPHERICS)
+	req_one_access = list(ACCESS_ATMOSPHERICS, ACCESS_ATMOS_EQUIP)
 
 /obj/machinery/button/door/incinerator_vent_syndicatelava_main
 	name = "turbine vent control"
diff --git a/code/game/objects/items/devices/flashlight.dm b/code/game/objects/items/devices/flashlight.dm
index 9f1eed549546..2d2fc73d6327 100644
--- a/code/game/objects/items/devices/flashlight.dm
+++ b/code/game/objects/items/devices/flashlight.dm
@@ -269,7 +269,7 @@
 	if(!scanning.get_bodypart(BODY_ZONE_HEAD))
 		to_chat(user, span_warning("[scanning] doesn't have a head!"))
 		return
-	if(light_power < 1)
+	if(light_power < 0.5)
 		to_chat(user, span_warning("[src] isn't bright enough to see anything!"))
 		return
 
diff --git a/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm b/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
index 50ac111c865a..5b0214654501 100644
--- a/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
+++ b/code/game/objects/structures/crates_lockers/closets/secure/engineering.dm
@@ -81,7 +81,7 @@
 
 /obj/structure/closet/secure_closet/atmospherics
 	name = "atmospheric technician's locker"
-	req_access = list(ACCESS_ATMOSPHERICS)
+	req_access = list(ACCESS_ATMOS_EQUIP)
 	icon_state = "atmos"
 
 /obj/structure/closet/secure_closet/atmospherics/PopulateContents()
diff --git a/code/modules/atmospherics/environmental/LINDA_fire.dm b/code/modules/atmospherics/environmental/LINDA_fire.dm
index ae001a646179..39aa0a393715 100644
--- a/code/modules/atmospherics/environmental/LINDA_fire.dm
+++ b/code/modules/atmospherics/environmental/LINDA_fire.dm
@@ -73,7 +73,7 @@
 
 	/// base sprite used for our icon states when smoothing
 	/// BAAAASICALY the same as icon_state but is helpful to avoid duplicated work
-	var/fire_stage = ""
+	var/fire_stage = 1/*""*/
 	/**
 	 * Volume is the representation of how big and healthy a fire is.
 	 * Hotspot volume will be divided by turf volume to get the ratio for temperature setting on non bypassing mode.
@@ -307,7 +307,7 @@
 	perform_exposure()
 
 	if(bypassing)
-		set_fire_stage("heavy")
+		set_fire_stage(3/*"heavy"*/)
 		if(!cold_fire)
 			location.burn_tile()
 
@@ -323,9 +323,9 @@
 
 	else
 		if(volume > CELL_VOLUME*0.4)
-			set_fire_stage("medium")
+			set_fire_stage(2/*"medium"*/)
 		else
-			set_fire_stage("light")
+			set_fire_stage(1/*"light"*/)
 
 	if((visual_update_tick++ % 7) == 0)
 		update_color()
@@ -336,7 +336,7 @@
 	if(fire_stage == stage)
 		return
 	fire_stage = stage
-	icon_state = stage
+	icon_state = "[stage]"
 	dir = pick(GLOB.cardinals)
 	update_color()
 
diff --git a/code/modules/atmospherics/machinery/air_alarm/_air_alarm.dm b/code/modules/atmospherics/machinery/air_alarm/_air_alarm.dm
index b8bff006ff86..6b9bf97fbf3a 100644
--- a/code/modules/atmospherics/machinery/air_alarm/_air_alarm.dm
+++ b/code/modules/atmospherics/machinery/air_alarm/_air_alarm.dm
@@ -8,7 +8,7 @@
 	idle_power_usage = BASE_MACHINE_IDLE_CONSUMPTION * 0.05
 	active_power_usage = BASE_MACHINE_ACTIVE_CONSUMPTION * 0.02
 	power_channel = AREA_USAGE_ENVIRON
-	req_access = list(ACCESS_ENGINEERING)
+	req_access = list(ACCESS_ATMOS_EQUIP)
 	max_integrity = 250
 	integrity_failure = 0.33
 	armor_type = /datum/armor/machinery_airalarm
diff --git a/code/modules/cargo/packs/emergency.dm b/code/modules/cargo/packs/emergency.dm
index b48ef268da68..acf43d8b94ea 100644
--- a/code/modules/cargo/packs/emergency.dm
+++ b/code/modules/cargo/packs/emergency.dm
@@ -63,7 +63,7 @@
 	name = "Firefighting Tank Backpack"
 	desc = "Mow down fires with this high-capacity fire fighting tank backpack."
 	cost = CARGO_CRATE_VALUE * 1.8
-	access = ACCESS_ATMOSPHERICS
+	access = ACCESS_ATMOS_EQUIP
 	contains = list(/obj/item/watertank/atmos)
 	crate_name = "firefighting backpack crate"
 	crate_type = /obj/structure/closet/crate/secure/engineering/atmos
diff --git a/code/modules/cargo/packs/engineering.dm b/code/modules/cargo/packs/engineering.dm
index c1ec02157b70..9387eca7c478 100644
--- a/code/modules/cargo/packs/engineering.dm
+++ b/code/modules/cargo/packs/engineering.dm
@@ -123,7 +123,7 @@
 	desc = "Did someone let the air out of the shuttle again? We've got you covered. \
 		Contains two portable air pumps."
 	cost = CARGO_CRATE_VALUE * 4.5
-	access_view = ACCESS_ATMOSPHERICS
+	access_view = ACCESS_ATMOS_EQUIP
 	contains = list(/obj/machinery/portable_atmospherics/pump = 2)
 	crate_name = "portable air pump crate"
 	crate_type = /obj/structure/closet/crate/secure/engineering/atmos
@@ -132,7 +132,7 @@
 	name = "Portable Scrubber Crate"
 	desc = "Clean up that pesky plasma leak with your very own set of two portable scrubbers."
 	cost = CARGO_CRATE_VALUE * 4.5
-	access_view = ACCESS_ATMOSPHERICS
+	access_view = ACCESS_ATMOS_EQUIP
 	contains = list(/obj/machinery/portable_atmospherics/scrubber = 2)
 	crate_name = "portable scrubber crate"
 	crate_type = /obj/structure/closet/crate/secure/engineering/atmos
@@ -141,7 +141,7 @@
 	name = "Huge Portable Scrubber Crate"
 	desc = "A huge portable scrubber for huge atmospherics mistakes."
 	cost = CARGO_CRATE_VALUE * 7.5
-	access_view = ACCESS_ATMOSPHERICS
+	access_view = ACCESS_ATMOS_EQUIP
 	contains = list(/obj/machinery/portable_atmospherics/scrubber/huge/movable/cargo)
 	crate_name = "huge portable scrubber crate"
 	crate_type = /obj/structure/closet/crate/large
diff --git a/code/modules/mapping/access_helpers.dm b/code/modules/mapping/access_helpers.dm
index c208e2eea9ea..d2dd290ae673 100644
--- a/code/modules/mapping/access_helpers.dm
+++ b/code/modules/mapping/access_helpers.dm
@@ -121,6 +121,11 @@
 	access_list += ACCESS_ATMOSPHERICS
 	return access_list
 
+/obj/effect/mapping_helpers/airlock/access/any/engineering/atmos_equip/get_access()
+	var/list/access_list = ..()
+	access_list += ACCESS_ATMOS_EQUIP
+	return access_list
+
 /obj/effect/mapping_helpers/airlock/access/any/engineering/tcoms/get_access()
 	var/list/access_list = ..()
 	access_list += ACCESS_TCOMMS
@@ -602,6 +607,11 @@
 	access_list += ACCESS_ATMOSPHERICS
 	return access_list
 
+/obj/effect/mapping_helpers/airlock/access/all/engineering/atmos_equip/get_access()
+	var/list/access_list = ..()
+	access_list += ACCESS_ATMOS_EQUIP
+	return access_list
+
 /obj/effect/mapping_helpers/airlock/access/all/engineering/tcoms/get_access()
 	var/list/access_list = ..()
 	access_list += ACCESS_TCOMMS