diff --git a/caimira/apps/templates/base/calculator.form.html.j2 b/caimira/apps/templates/base/calculator.form.html.j2
index 90fbf6b0..59076fcc 100644
--- a/caimira/apps/templates/base/calculator.form.html.j2
+++ b/caimira/apps/templates/base/calculator.form.html.j2
@@ -366,13 +366,13 @@
                 <strong>Room data:</strong>
                 <div class="form-group">
                   <label class="col-form-label" for="room_capacity">Maximum occupation – design limit:</label>
-                  <div data-tooltip="The maximum number of occupaants selected for the design of the building/room. What is typically shown in architectural design drawings.">
+                  <div data-tooltip="The maximum number of occupants foreseen by the architectural design of the room. It is only used by the CO2 fitting algorithm to convert the ventilation rate obtained in L/s/person. If not specified, this conversion will not be performed.">
                       <span class="tooltip_text">?</span>
                   </div>
                   <input type="number" id="room_capacity" class="form-control col-sm-7" name="room_capacity" placeholder="Number" min=1 form="not-submitted">
                   <p id="warning_room_capacity_null" class="mt-2" style="display: none">
-                    <strong>Note:</strong> The maximum occupation - design limit was not defined. <br>
-                    Therefore the flow rate in liters per second per person will not be calculated.
+                    <strong>Note:</strong> The maximum occupation - design limit was not specified. <br>
+                    Therefore the flow rate in liters per second per person will not be performed.
                   </p>
                 </div>
               </div>