HeatpumpMonitor.org Tips: Comparing a system to itself

On HeatpumpMonitor, you can compare data from two or more systems.

You can also compare a system to itself, across different dates by unticking the “Match dates”.
This could be useful to assess the impact improvements that have been made.

For example, I’ve compared my system (#1) over the last 3 months (red) against the same period in the previous year (blue), having switched out the room thermostat I was using:


To my eye, the system appears to be running better this winter. :+1:

PS: There’s a bug with the date controls that don’t like 2024.