# Heat pump startups vs. ambient temp graph/analysis - does this tool exist?

**URL:** <https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473>\
**Category:** Development\
**Tags:** myheatpump, heatpumpmonitor\
**Created:** [3 December 2025 17:29 UTC](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473 "2025-12-03T17:29:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![John](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/john/32/26233_2.png) [@John](https://community.openenergymonitor.org/u/John)\
**Post date:** [3 December 2025 17:29 UTC](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473/1 "2025-12-03T17:29:49Z")

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I recently spotted a dialogue including @glyn.hudson and @TrystanLea about HP cycling, and there were a few examples of graphs from EmonCMS data that plotted compressor startups vs. ambient temp or some such parameter. Now of course, 50 posts later, I can’t recall where!! Is this available anywhere, or was it a one-off or experimental piece of work?

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**Author:** ![TrystanLea](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/trystanlea/32/31_2.png) [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\
**Post date:** [13 December 2025 09:55 UTC](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473/2 "2025-12-13T09:55:47Z")

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Hello @John

We’re measuring starts and starts per hour on [HeatpumpMonitor.org](http://HeatpumpMonitor.org), was the discussion about that?

> **[HeatpumpMonitor.org - Heat Pump Performance Data](https://heatpumpmonitor.org/?chart=1&selected_xaxis=combined_starts)**
>
> An open-source initiative to share and compare heat pump performance data. Join our community of heat pump owners sharing real-world performance data.

Maybe this thread: [HeatpumpMonitor.org starts & starts per hour](https://community.openenergymonitor.org/t/heatpumpmonitor-org-starts-starts-per-hour/26246)

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**Author:** ![John](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/john/32/26233_2.png) [@John](https://community.openenergymonitor.org/u/John)\
**Post date:** [13 December 2025 11:12 UTC](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473/3 "2025-12-13T11:12:28Z")

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Thanks @TrystanLea! I completely forgot about the Add Fields feature 🤦‍♂️! Yeah my massive Daikin is cycling, but nothing too serious…