diff --git a/README.md b/README.md
index 4e5159f..6d3ce22 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ A small web page to adjust the heating per room from a phone on the home network
 
 ## Airing
 
-"Airing 15/30/60" sends `system_mode: off`. When the time is up, or on "Heat again", the room gets back the mode and target from before.
+"Air 5/15/30/60" sends `system_mode: off` for that many minutes, with 5 for a quick Stoßlüften. When the time is up, or on "Heat again", the room gets back the mode and target from before.
 
 The service keeps no saved state, so a restart during airing forgets it: **that room stays off until someone taps "Heat again"**. A target waiting to be sent is lost too. The thermostat's own frost protection still applies.
 
diff --git a/internal/api/api.gen.go b/internal/api/api.gen.go
index 08647ad..379d2c9 100644
--- a/internal/api/api.gen.go
+++ b/internal/api/api.gen.go
@@ -68,6 +68,7 @@ func (e Mode) Valid() bool {
 const (
 	N15 StartAiringRequestMinutes = 15
 	N30 StartAiringRequestMinutes = 30
+	N5  StartAiringRequestMinutes = 5
 	N60 StartAiringRequestMinutes = 60
 )
 
@@ -78,6 +79,8 @@ func (e StartAiringRequestMinutes) Valid() bool {
 		return true
 	case N30:
 		return true
+	case N5:
+		return true
 	case N60:
 		return true
 	default:
diff --git a/internal/api/openapi.yaml b/internal/api/openapi.yaml
index 5798e46..4c9b8c8 100644
--- a/internal/api/openapi.yaml
+++ b/internal/api/openapi.yaml
@@ -256,7 +256,7 @@ components:
       properties:
         minutes:
           type: integer
-          enum: [15, 30, 60]
+          enum: [5, 15, 30, 60]
           description: How long to air the room.
     SetTargetRequest:
       type: object
diff --git a/internal/web/static/index.html b/internal/web/static/index.html
index 9b7f2ed..e27a853 100644
--- a/internal/web/static/index.html
+++ b/internal/web/static/index.html
@@ -50,7 +50,7 @@
   .note { color: var(--muted); font-size: .9rem; margin-top: 8px; }
   .note:empty { display: none; }
   .note.problem { color: var(--error); }
-  .airing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 8px; }
+  .airing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 8px; }
   .airing button.stop { grid-column: 1 / -1; background: var(--accent); color: var(--card); font-weight: 600; }
   [hidden] { display: none !important; }
 </style>
@@ -78,7 +78,7 @@ <h1>Heating</h1>
     errorEl.textContent = commandError || connectionError;
   }
 
-  const airingMinutes = [15, 30, 60];
+  const airingMinutes = [5, 15, 30, 60];
 
   const clock = iso => new Date(iso).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' });
   const degrees = v => v == null ? '–' : v.toFixed(1) + ' °C';
@@ -140,7 +140,7 @@ <h1>Heating</h1>
     airing.className = 'airing';
     const start = airingMinutes.map(minutes => {
       const b = document.createElement('button');
-      b.textContent = 'Airing ' + minutes;
+      b.textContent = 'Air ' + minutes;
       b.setAttribute('aria-label', 'Air ' + room.label + ' for ' + minutes + ' minutes');
       b.addEventListener('click', () => startAiring(room.id, minutes));
       airing.append(b);
diff --git a/internal/web/web.go b/internal/web/web.go
index 74653cc..ef90b74 100644
--- a/internal/web/web.go
+++ b/internal/web/web.go
@@ -144,7 +144,7 @@ func (s server) SetRoomTarget(_ context.Context, r api.SetRoomTargetRequestObjec
 
 func (s server) StartRoomAiring(_ context.Context, r api.StartRoomAiringRequestObject) (api.StartRoomAiringResponseObject, error) {
 	if !r.Body.Minutes.Valid() {
-		return api.StartRoomAiring400JSONResponse{Message: "minutes must be 15, 30 or 60"}, nil
+		return api.StartRoomAiring400JSONResponse{Message: "minutes must be 5, 15, 30 or 60"}, nil
 	}
 	switch err := s.rooms.StartAiring(r.Id, time.Duration(r.Body.Minutes)*time.Minute); {
 	case err == nil:
diff --git a/internal/web/web_test.go b/internal/web/web_test.go
index b89999e..5ec8854 100644
--- a/internal/web/web_test.go
+++ b/internal/web/web_test.go
@@ -190,6 +190,14 @@ func TestStartAiring(t *testing.T) {
 	}
 }
 
+func TestStartAiringForFiveMinutes(t *testing.T) {
+	f := &fakeRooms{}
+	rec := post(t, handler(f), "/api/rooms/office/airing", `{"minutes":5}`, nil)
+	if rec.Code != http.StatusAccepted || f.airing != 5*time.Minute {
+		t.Fatalf("status %d, airing %v", rec.Code, f.airing)
+	}
+}
+
 func TestStartAiringErrors(t *testing.T) {
 	tests := []struct {
 		name string