diff --git a/cara/tests/test_ventilation.py b/cara/tests/test_ventilation.py
index 86a1dbf2..134acf57 100644
--- a/cara/tests/test_ventilation.py
+++ b/cara/tests/test_ventilation.py
@@ -92,6 +92,28 @@ def test_sliding_window(baseline_slidingwindow):
     assert baseline_slidingwindow.discharge_coefficient == 0.6
 
 
+def test_hvac_mechanical_vectorisation():
+    room = models.Room(volume=50)
+    interval = models.SpecificInterval(((0, 4), (5, 9)))
+    t = 0.5
+    q_air_mech = np.array([250., 500.])
+    v = models.HVACMechanical(interval,q_air_mech)
+    assert isinstance(v.air_exchange(room, t), np.ndarray)
+    npt.assert_array_equal(v.air_exchange(room, t),
+                        np.array([250/room.volume, 500/room.volume]))
+
+
+def test_hepa_filter_vectorisation():
+    room = models.Room(volume=50)
+    interval = models.SpecificInterval(((0, 4), (5, 9)))
+    t = 0.5
+    q_air_mech = np.array([250., 500.])
+    v = models.HEPAFilter(interval,q_air_mech)
+    assert isinstance(v.air_exchange(room, t), np.ndarray)
+    npt.assert_array_equal(v.air_exchange(room, t),
+                        np.array([250/room.volume, 500/room.volume]))
+
+
 def test_multiple(baseline_slidingwindow, baseline_hingedwindow):
     v = models.MultipleVentilation([baseline_hingedwindow, baseline_slidingwindow])
     room = models.Room(75)