diff --git a/PurpleMenu.xcodeproj/project.pbxproj b/PurpleMenu.xcodeproj/project.pbxproj
index 761a1f8..87facab 100644
--- a/PurpleMenu.xcodeproj/project.pbxproj
+++ b/PurpleMenu.xcodeproj/project.pbxproj
@@ -40,7 +40,7 @@
 
 /* Begin PBXFileReference section */
 		3726C1C9252CEEA900B0B216 /* PurpleMenu.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = PurpleMenu.app; sourceTree = BUILT_PRODUCTS_DIR; };
-		3726C1CC252CEEA900B0B216 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		3726C1CC252CEEA900B0B216 /* AppDelegate.swift */ = {isa = PBXFileReference; indentWidth = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; tabWidth = 4; };
 		3726C1CE252CEEA900B0B216 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		3726C1D0252CEEAB00B0B216 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		3726C1D3252CEEAB00B0B216 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
@@ -89,7 +89,9 @@
 				3726C1CA252CEEA900B0B216 /* Products */,
 				3748D1A3252D511200A758D6 /* Frameworks */,
 			);
+			indentWidth = 2;
 			sourceTree = "<group>";
+			tabWidth = 2;
 		};
 		3726C1CA252CEEA900B0B216 /* Products */ = {
 			isa = PBXGroup;
diff --git a/PurpleMenu/AppDelegate.swift b/PurpleMenu/AppDelegate.swift
index cad2180..535b5d2 100644
--- a/PurpleMenu/AppDelegate.swift
+++ b/PurpleMenu/AppDelegate.swift
@@ -107,6 +107,8 @@ class AppDelegate: NSObject, NSApplicationDelegate {
                 aqi = self.pmToAQandU(pm: pm25)
             case .lrapa:
                 aqi = self.pmToLRAPA(paCf1: pm25Cf1)
+            case .woodfire:
+                aqi = self.pmToWoodsmoke(pm25Cf1: (pm25Cf1 + pm25Cf1B) * 0.5)
             }
 
             DispatchQueue.main.async {
@@ -147,24 +149,31 @@ class AppDelegate: NSObject, NSApplicationDelegate {
     }
 
     func pmToAQandU(pm: Float) -> Int {
-      // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
-      // PM2.5 (µg/m³) = 0.778 x PA + 2.65
-      return pmToAQI(0.778 * pm + 2.65)
+        // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
+        // PM2.5 (µg/m³) = 0.778 x PA + 2.65
+        return pmToAQI(0.778 * pm + 2.65)
     }
 
     func pmToLRAPA(paCf1: Float) -> Int {
-      // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
-      // 0 - 65 µg/m³ range:
-      // LRAPA PM2.5 (µg/m³) = 0.5 x PA (PM2.5 CF=ATM) – 0.66
-      // note that this calculation at PurpleAir seems wrong, their PM2.5 values are from CF=ATM (atmo) rather than CF=1 (standard particles)
-      return pmToAQI(0.5 * paCf1 - 0.66)
+        // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
+        // 0 - 65 µg/m³ range:
+        // LRAPA PM2.5 (µg/m³) = 0.5 x PA (PM2.5 CF=ATM) – 0.66
+        // note that this calculation at PurpleAir seems wrong, their PM2.5 values are from CF=ATM (atmo) rather than CF=1 (standard particles)
+        return pmToAQI(0.5 * paCf1 - 0.66)
     }
 
     func pmToEPA(paCf1: Float, humidity: Float) -> Int {
-      // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
-      // 0-250 ug/m3 range (>250 may underestimate true PM2.5):
-      // PM2.5 (µg/m³) = 0.534 x PA(cf_1) - 0.0844 x RH + 5.604
-      // more at https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=349513&Lab=CEMM&simplesearch=0&showcriteria=2&sortby=pubDate&timstype=&datebeginpublishedpresented=08/25/2018
-      return pmToAQI(0.534 * paCf1 - 0.0844 * humidity + 5.604)
+        // formula found on https://www.purpleair.com/map, shown when you hover on the `?` next to `Conversion`
+        // 0-250 ug/m3 range (>250 may underestimate true PM2.5):
+        // PM2.5 (µg/m³) = 0.534 x PA(cf_1) - 0.0844 x RH + 5.604
+        // more at https://cfpub.epa.gov/si/si_public_record_report.cfm?dirEntryId=349513&Lab=CEMM&simplesearch=0&showcriteria=2&sortby=pubDate&timstype=&datebeginpublishedpresented=08/25/2018
+        return pmToAQI(0.534 * paCf1 - 0.0844 * humidity + 5.604)
+    }
+
+    func pmToWoodsmoke(pm25Cf1: Float) -> Int {
+        // WOODSMOKE: From a study in Australia comparing Purple Air with NSW Government TEOM PM2.5 and Armidale Regional Council's DustTrak measurements - see published peer-reviewed study - https://www.mdpi.com/2073-4433/11/8/856/htm.
+        // Woodsmoke PM2.5 (µg/m³) = 0.55 x PA (PM2.5 CF=1) + 0.53
+
+        return pmToAQI(0.55 * pm25Cf1 + 0.53)
     }
 }
diff --git a/PurpleMenu/Sensor.swift b/PurpleMenu/Sensor.swift
index 83ba6cf..7ca8aa8 100644
--- a/PurpleMenu/Sensor.swift
+++ b/PurpleMenu/Sensor.swift
@@ -8,7 +8,7 @@
 import Foundation
 
 enum Conversion: String, CaseIterable, Identifiable {
-    case none = "None", epa = "US EPA", aqandu = "AQandU", lrapa = "LRAPA"
+    case none = "None", epa = "US EPA", aqandu = "AQandU", lrapa = "LRAPA", woodfire = "Woodsmoke"
 
     var id: String { self.rawValue }
     var description: String {