Hi all, I’m trying to understand a discrepancy between my gas usage (in MJ) and the theoretical energy required to heat water. The numbers don’t seem to line up, even after accounting for system efficiency. Meter DataRead Date: 23 Mar 2026Read Type: ActualStart Read: 1,887End Read: 3,342Usage: 1,455 unitsUnit Size: 10 L (i.e. tens of litres)Conversion Factor: 0.477937Total Energy: 6,954 MJ So total water volume used: 1,455 × 10 L = 14,550 L Expected Energy to Heat Water Assuming: Starting temp = ...
