Degree Days

A Home Assistant integration that calculates (weighted) heating degree days from your own outdoor temperature sensor, relates them to your gas or energy consumption, and lets you compare periods the way Mindergas does — using the history that is already in your Home Assistant recorder.

• Degree days and weighted degree days per day, month and year. Dutch weighting (gewogen graaddagen): Nov–Feb × 1.1, Mar & Oct × 1.0, Apr–Sep × 0.8. Base temperature (default 18 °C) and heating limit…
• Consumption per day/month/year from any gas or energy meter with long-term statistics (DSMR/P1 gas meter, heat pump kWh, …).
• Usage per weighted degree day (yesterday, last 30 days, this year, previous year), optionally excluding a fixed daily non-heating usage (hot water, cooking).
• Year-to-date comparison with last year, corrected for the weather.
• Uses your existing history. Everything is calculated from the recorder's long-term statistics, which Home Assistant keeps indefinitely, so results go back as far as your sensors have been recorded…
• Degree days as long-term statistics (degree_days:entry_degree_days and degree_days:entry_weighted_degree_days), so you can plot and compare them per day/week/month/year next to your gas usage in the
• Actions (services) to compare arbitrary periods and to retrieve the data per day, week, month or year.