Overview
- New analyses from co2online show heating use and costs rise roughly 6% for each 1°C drop in outdoor temperature.
- For a 130 m² single-family home at −10°C, weekly extra costs range from about €55 with oil to about €110 with a heat pump.
- A 100 m² apartment incurs roughly €16 per week at −1°C with oil, €20 with gas, and €27 with district heating compared with +5°C.
- Several frost weeks still add noticeable sums for smaller 45 m² flats, with double‑digit euro increases despite lower absolute usage.
- Consumers are advised to lower setpoints, use night setback and short airing, keep radiators clear, consider raising monthly advances if usage jumps, and scrutinize billing details such as weather adjustments and allocation keys.