A big heat wave has hit Finland lately and it’s been quite hot for the last couple of weeks. That got me wondering about energy usage of the A\/C.<\/p>\n\n\n\n
Quite often we are hanging out on our terrace and the backdoor is open. However, I don’t want to cool the outdoor air and waste energy for that. That got me an idea, how about shutting down the A\/C unit when the door is open and continue cooling when the door is closed again? <\/p>\n\n\n\n
Oh, and of course it should work also on winter when heating is on. I don’t want to heat the outdoor air either \ud83d\ude42<\/p>\n\n\n\n
For this automation only two components are required: A\/C unit that can be controlled through Home Assistant and a magnetic door sensor.<\/p>\n\n\n\n
I have a Mitsubishi FH35 A\/C unit that has custom made MQTT network controller<\/a> and a Xiaomi Aqara door\/window sensor<\/a> that is connected to Home Assistant through ZigBee network.<\/p>\n\n\n\n The automation logic is pretty simple:<\/p>\n\n\n\n When the door opens:<\/strong><\/p>\n\n\n\n When the door closes:<\/strong><\/p>\n\n\n\n Here are the automation scripts I wrote. Of course, you need to modify those at least with your entity ids.<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" A big heat wave has hit Finland lately and it’s been quite hot for the last couple of weeks. That got me wondering about energy…<\/p>\n","protected":false},"author":1,"featured_media":552,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[100,2],"tags":[101,105,106,7,103],"class_list":["post-550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-home-assistant","category-inspiration","tag-a-c","tag-automation","tag-energy-saving","tag-home-assistant","tag-mitsubishi","has-post-thumbnail-archive"],"acf":[],"featured_image_src":"https:\/\/www.creatingsmarthome.com\/wp-content\/uploads\/2021\/07\/mitsubishi.png","author_info":{"display_name":"Toni","author_link":"https:\/\/www.creatingsmarthome.com\/index.php\/author\/topsy\/"},"_links":{"self":[{"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/posts\/550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/comments?post=550"}],"version-history":[{"count":4,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/posts\/550\/revisions"}],"predecessor-version":[{"id":555,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/posts\/550\/revisions\/555"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/media\/552"}],"wp:attachment":[{"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/media?parent=550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/categories?post=550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.creatingsmarthome.com\/index.php\/wp-json\/wp\/v2\/tags?post=550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Automation<\/h2>\n\n\n\n
Bonus: Ready made automations<\/h2>\n\n\n\n
- id: '1625563681954'\n alias: 'Climate: Turn off A\/C when back door is open'\n description: 'Turn off A\/C when back door is open'\n trigger:\n - platform: state\n entity_id: binary_sensor.door_sensor_terrace\n from: 'off'\n to: 'on'\n for: 00:03:00\n condition: []\n action:\n - service: scene.create\n data:\n snapshot_entities: climate.heat_pump\n scene_id: heat_pump_previous_state\n - service: climate.set_hvac_mode\n target:\n entity_id: climate.heat_pump\n data:\n hvac_mode: 'off'\n mode: single\n\n- id: '1625563856240'\n alias: 'Climate: Restore A\/C when backdoor is closed'\n description: 'Restore A\/C when backdoor is closed'\n trigger:\n - platform: state\n entity_id: binary_sensor.door_sensor_terrace\n from: 'on'\n to: 'off'\n condition: []\n action:\n - scene: scene.heat_pump_previous_state\n mode: single\n\n<\/code><\/pre>\n\n\n\n