00:00 - Start 00:22 - The background - What did it look like before? 01:27 - The old oil heating 01:55 - Our new system: Decentralized 02:55 - What is the difference between air conditioning and central heat pump 06:05 - Efficiency of heat pump vs. air conditioning 09:27 - Hot water? 11:21 - Decentralized ventilation + heat recovery 12:42 - Cost comparison: Purchase 15:57 - Cost comparison: Operating costs ~▬▬▬▬▬▬ Links in the video ▬▬▬▬▬~ This is where I bought my air conditioning units, both shops were fine: https://ebay.us/lwZjG6 https://ebay.us/zKnbvK Climate table: https://www.meteoblue.com/de/wetter/h... Good installation video (without Quick Connect, but works similarly): • INSTALLING YOUR AIR CONDITIONING SYSTEM YOURSELF: IN DETAIL... ~▬▬▬▬▬▬ Bugs in the video ▬▬▬▬▬~ ~▬▬▬▬▬▬ Our community forum ▬▬▬▬▬~ https://forum.drbacke.de/ ~▬▬▬▬▬▬ Material used (affiliate links) ▬▬▬▬▬~ JKBMS: https://de.aliexpress.com/item/400052... Internal resistance meter YR1030/1035: https://s.click.aliexpress.com/e/_9wk7xA Battery tester ZKETECH EBX-A20: https://s.click.aliexpress.com/e/_A0Y0zD Portable oscilloscope: https://s.click.aliexpress.com/e/_APQHOu Fuse wire: https://de.rs-online.com/mobile/p/kup... D1 Mini (1.8€): http://s.click.aliexpress.com/e/truM5FtW 5V voltage converter (0.3€): https://de.aliexpress.com/item/326545... Perforated board (17€ 80 pieces): https://amzn.to/35vfO3s Perforated board (0.41€ 1 piece) http://s.click.aliexpress.com/e/_ryXeFl Resistors (8.89€ 600 pieces. https://amzn.to/38nnJBT) Switch wire (2x20m 8.99€): https://amzn.to/2FnQwtt Temperature sensors (10 pieces 16.49€): https://amzn.to/30IeGZK DS18B20 (0.91€ 9.11€/10 pieces): https://s.click.aliexpress.com/e/_sZ2LJA 12V,24V48V charge controller (simple but works well): http://s.click.aliexpress.com/e/FkzAzEXq 35Ah LiTi battery (a little smaller than mine, but thick enough): http://s.click.aliexpress.com/e/pYN5iqHw VINAtech Supercap 360F 2.7V: https://www.conrad.de/de/p/vinatech-v... QNBBM Active Balancer (I use myself): http://s.click.aliexpress.com/e/r5bJoONa Current sensor (used myself): https://amzn.to/2peM4bK Steel cable ties (used myself): https://amzn.to/31cRpgU Solder 1mm acid-free (used myself): https://amzn.to/3dxN3KP Ersa 150W soldering iron: https://amzn.to/3l5Eb0M Note: If you click on links in the affiliate section in this description and make a purchase: I may get a small commission via AliExpress, Ebay or Amazon. However, I have no direct connection to the retailers / products. This is a good way to say thank you: It costs you a click and brings me a little something for my work. ~▬▬▬▬▬▬ Image sources ▬▬▬▬▬~ Raspberry PI4 Image: By Miiicihiaieil Hieinizilieir / Wikimedia Commons, CC BY-SA 4.0, https://commons.wikimedia.org/w/index... ~▬▬▬▬▬▬ Disclaimer and Imprint ▬▬▬▬▬~ https://forum.drbacke.de/aboutus Note: If you click on links in the affiliate section in this description and make a purchase: I may get a small commission via AliExpress, Ebay or Amazon. However, I have no direct connection to the retailers / products. This is a good way to say thank you: It costs you a click and brings me a little something for my work.