Download "That's why our heat pump couldn't heat the house at minus 15 degrees."

With freezing temperatures outside, our heat pump couldn't heat our living room anymore. Did we choose one that was too small? In this video, we present five reasons that could be responsible for the temperature drop. New!!! T-shirts, mugs, and more are now available in our shop. Feel free to check it out :-) https://gewaltignachhaltig.myspreadshop.net/ Advertisement: Our new book, "Energy Transition - How It Works," is available now! https://www.penguin.de/buecher/martin-oster-energiewende-so-geht-s/paperback/9783517303567 Our first book, "Photovoltaics for Beginners," is the perfect complement: https://www.penguin.de/buecher/anne-pamperin-photovoltaik-fuer-einsteiger/paperback/9783517303314 Switch to Tibber's dynamic electricity tariff now via this link: https://tidd.ly/44xerzK. Enter "gewaltignachhaltig" as the code and you'll receive €50 in credit in the Tibber store (e.g., for the Pulse), and we'll receive a commission. The perfect complement to this is our first book, "Photovoltaics for Beginners": https://www.penguin.de/buecher/anne-pamperin-photovoltaik-fuer-einsteiger/paperback/9783517303314 Switch to Tibber's dynamic electricity tariff now via this link: https://tidd.ly/44xerzK. Enter "gewaltignachhaltig" as the code and you'll receive €50 in credit in the Tibber store (e.g., for the Pulse). Money for your electric car: With our link to the GHG quota at Geld für eAuto (Money for Electric Cars), you get the best terms and we receive a commission: https://geld-fuer-eauto.de/?code=gewaltignachhaltig If you like our work and find our tips helpful, please support us via PayPal: https://www.paypal.com/donate/?hosted_button_id=SD4BJJHK8ASL4 Everything about modules 1-3 of Section 14a of the German Energy Industry Act (EnWG): https://www.bundesnetzagentur.de/DE/Vportal/Energie/SteuerbareVBE/artikel.html For more sustainability in life - tips, trends, tests, statistics, buying recommendations, surveys and much more: https://www.utopia.de 20 billion euros per year for diesel and kerosene: https://www.umweltbundesamt.de/sites/default/files/medien/479/publikationen/texte_143-2021_umweltschaedliche_subventionen.pdf Most thumbnails are generated using an AI image generator. Unless otherwise indicated, the video content is AI-free. Our PV system: 20.56 kWp, 44 x IBC Polysol 270/285 Wp modules, mounted at a 10° angle, east-west facing (-65°/115°) / 11 x Astronergy 405 Wp modules, east facing (-65°) / 10 x Astronergy 405 Wp modules, south facing (25°) - SMA STP SE 10.0 + STP 6.0 inverters - SMA Home Storage 13.1 kWh battery - 15% backup power reserve - SMA eCharger 22 - PV yield: 615 kWh/kWp Our balcony power system: 1.78 kWp, 4 x IBC modules, 445 Wp modules, mounted at a 90° angle on the south-east facing facade (-65°) - 8 kWh battery storage - 800 W inverter Our electric car: Tesla Model 3 Performance with an annual mileage of 15,000 km, of which 3,000 km are used for... Long-distance travel with charging stops. Our heating system: Vaillant arotherm plus VWL 75/6 A heat pump – heating output up to 7 kW – electrical output up to 3 kW – settings: heating curve 0.4, base temperature 22 degrees – gas consumption to date approx. 24,000 kWh. Our house: atrium bungalow built in 1983, unrenovated – 120 m² ground floor with underfloor heating – 40 m² basement, uninsulated and unheated – exterior wall insulation (42 cm sand-lime brick) 10 cm – flat roof insulation 15 cm – double-glazed wooden windows from 1983 – 2-person household – living room temperature: 19-20°C – other room temperature: 17-18°C – basement temperature: 18-19°C. Calculated heating load: 8 kW. Building energy demand: 160 kWh*m²/a The current costs of the components of our private energy transition are as follows: PV system with storage and wallbox: €25,000 + 1% annual operating costs. Balcony power plant: €3,000. The electric car is cost-neutral compared to a similar combustion engine vehicle in terms of purchase and maintenance, except for fuel costs. The heat pump cost €8,500 more after a 40% subsidy. Total: €41,500 plus any financing interest.