Don't really need to read climate info when there's nothing to read

sensors/house_stats.yaml

@@ -137,6 +137,15 @@
           states.light.front_porch_light
         ] %}
         {{ lights | selectattr('state','eq','on') | list | count }}
+    climate_devices_installed:
+      friendly_name: Climate Devices Installed
+      unit_of_measurement: 'installed'
+      value_template: >-
+        {% set devices = [
+          states.input_boolean.master_bedroom_aircon_installed,
+          states.input_boolean.nursery_aircon_installed
+        ] %}
+        {{ devices | selectattr('state','eq','on') | list | count }}
     front_porch_color_temp:
       friendly_name: Front Porch Color Temp
       unit_of_measurement: 'mireds'

templates/speech/welcome_home.yaml

@@ -83,6 +83,7 @@
     </p>
 
     <p>
+      {% if (states('sensor.climate_devices_installed') | int) > 0 %}
         "The current climate control situation is as follows. "
           {% if is_state('input_boolean.master_bedroom_aircon_installed','on') %}
             "the master bedroom temperature is currently {{ state_attr('climate.master_bedroom_aircon','current_temperature') }} degrees. "
@@ -102,6 +103,7 @@
           {% else %}
             "There is no air conditioner or temperature sensor currently installed in the master bedroom. "
           {% endif %}
+        {% endif %}
     </p>
 
     <p>