# \#heatpumpmonitor **URL:** https://community.openenergymonitor.org/tag/heatpumpmonitor/133.md [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) --- ## [Vaillant Arotherm Owners Thread](https://community.openenergymonitor.org/t/vaillant-arotherm-owners-thread/21891)
**Author:** [@Zarch](https://community.openenergymonitor.org/u/Zarch)\ **Replies:** 1146\ **Last updated:** [17 September 2026 07:58 UTC](https://community.openenergymonitor.org/t/vaillant-arotherm-owners-thread/21891 "2026-09-17T07:58:51Z")
I thought it might be useful for the Vaillant Arotherm heatpump and its owners to have their own thread. So any questions, queries, things we’ve learnt and performance chatter can go in here. For starters, anyone looki… --- ## [Arotherm+ V2 added back into HPM from database](https://community.openenergymonitor.org/t/arotherm-v2-added-back-into-hpm-from-database/30261)
**Author:** [@thijs1](https://community.openenergymonitor.org/u/thijs1)\ **Replies:** 10\ **Last updated:** [15 September 2026 17:35 UTC](https://community.openenergymonitor.org/t/arotherm-v2-added-back-into-hpm-from-database/30261 "2026-09-15T17:35:52Z")
Hello! Up until yesterday we had the new 2026 Vaillant Arotherm in the database as V2, which was quite useful as this type differs from the older model. But since today it seems to have vanished from the database. Any i… --- ## [Per-system heat feed provenance (register vs computed) and metering\_boundary\_code derivation — for an open analysis of measured vs declared performance](https://community.openenergymonitor.org/t/per-system-heat-feed-provenance-register-vs-computed-and-metering-boundary-code-derivation-for-an-open-analysis-of-measured-vs-declared-performance/30230)
**Author:** [@Vincent](https://community.openenergymonitor.org/u/Vincent)\ **Replies:** 7\ **Last updated:** [18 August 2026 10:59 UTC](https://community.openenergymonitor.org/t/per-system-heat-feed-provenance-register-vs-computed-and-metering-boundary-code-derivation-for-an-open-analysis-of-measured-vs-declared-performance/30230 "2026-08-18T10:59:53Z")
Hello, I’m doing an independent analysis of heat pump field performance using the public heatpumpMonitor API, comparing measured seasonal performance against manufacturers’ declared SCOP values, normalised for actual op… --- ## [Room thermostat target value and flow target value logged simultaneously](https://community.openenergymonitor.org/t/room-thermostat-target-value-and-flow-target-value-logged-simultaneously/30231)
**Author:** [@caliburn2](https://community.openenergymonitor.org/u/caliburn2)\ **Replies:** 1\ **Last updated:** [13 August 2026 09:08 UTC](https://community.openenergymonitor.org/t/room-thermostat-target-value-and-flow-target-value-logged-simultaneously/30231 "2026-08-13T09:08:45Z")
Hi folks, First of all, great job to the team behind this platform. This is such a useful and massive database of actual heatpumps in operation. I am quite new to heatpump monitor and this is my very first question! I … --- ## [Vaillant inbuilt monitoring vs MID meters](https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230)
**Author:** [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\ **Replies:** 207\ **Last updated:** [1 July 2026 19:22 UTC](https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230 "2026-07-01T19:22:11Z")
Following on from Adam’s HeatGeek video https://www.youtube.com/watch?v=RlcvncWvNUQ. Im wondering where we are on the question of the accuracy of Vaillant’s inbuilt monitoring vs results from MID approved electric and h… --- ## [Passivhaus performance validation; Default columns in "Heatpump + Fabric" view](https://community.openenergymonitor.org/t/passivhaus-performance-validation-default-columns-in-heatpump-fabric-view/29913)
**Author:** [@dMb](https://community.openenergymonitor.org/u/dMb)\ **Replies:** 1\ **Last updated:** [17 April 2026 14:39 UTC](https://community.openenergymonitor.org/t/passivhaus-performance-validation-default-columns-in-heatpump-fabric-view/29913 "2026-04-17T14:39:37Z")
I’d like to propose an adjustment to the columns displayed by default in the “Heatpump + Fabric” view on Heatpumpmonitor.org. For compliance with the Passivhaus standard, a building must be designed such that its space … --- ## [How to publish data into heatpumpmonitor.org](https://community.openenergymonitor.org/t/how-to-publish-data-into-heatpumpmonitor-org/29693)
**Author:** [@MortenKK](https://community.openenergymonitor.org/u/MortenKK)\ **Replies:** 6\ **Last updated:** [10 February 2026 11:51 UTC](https://community.openenergymonitor.org/t/how-to-publish-data-into-heatpumpmonitor-org/29693 "2026-02-10T11:51:05Z")
Hi I have a local version of emonCMS running, and i would like to share the data by creating an account on heatpumpmonitor.org, but it is a bit unclear for me, what is required to do so. Credits are required, pr. feed,… --- ## [Monitor smart grid / PV diversion triggering ASHP](https://community.openenergymonitor.org/t/monitor-smart-grid-pv-diversion-triggering-ashp/26771)
**Author:** [@KnightPhoenix](https://community.openenergymonitor.org/u/KnightPhoenix)\ **Replies:** 6\ **Last updated:** [20 January 2026 12:24 UTC](https://community.openenergymonitor.org/t/monitor-smart-grid-pv-diversion-triggering-ashp/26771 "2026-01-20T12:24:53Z")
Not sure if this is a popular use case or not but I wanted to get some ideas. I have setup PV diversion to trigger my ASHP. When this happens it has an energy meter to limit the amount of electricity it can use (to the … --- ## ["No data available" showing over graph in emoncms](https://community.openenergymonitor.org/t/no-data-available-showing-over-graph-in-emoncms/29534)
**Author:** [@watchforstock](https://community.openenergymonitor.org/u/watchforstock)\ **Replies:** 2\ **Last updated:** [12 January 2026 21:42 UTC](https://community.openenergymonitor.org/t/no-data-available-showing-over-graph-in-emoncms/29534 "2026-01-12T21:42:49Z")
I have a level 3 HP monitor setup, although the electricity monitoring is awaiting a return visit from the electrician to install. It has been working fine through emoncms.org for a short while but now it seems to be sho… --- ## [Heat pump graphs auto scaling and spikes?](https://community.openenergymonitor.org/t/heat-pump-graphs-auto-scaling-and-spikes/29580)
**Author:** [@Martin\_Robinson](https://community.openenergymonitor.org/u/Martin_Robinson)\ **Replies:** 2\ **Last updated:** [7 January 2026 15:11 UTC](https://community.openenergymonitor.org/t/heat-pump-graphs-auto-scaling-and-spikes/29580 "2026-01-07T15:11:06Z")
Is there anything that can be done to control the auto Y-axis scaling for powers in the Heat Pump? My system creates these massive spikes in measured output power at the end of a DHW cycle, due to a long primary pipe… --- ## [Two COP values?](https://community.openenergymonitor.org/t/two-cop-values/29499)
**Author:** [@Martin\_Robinson](https://community.openenergymonitor.org/u/Martin_Robinson)\ **Replies:** 6\ **Last updated:** [16 December 2025 12:37 UTC](https://community.openenergymonitor.org/t/two-cop-values/29499 "2025-12-16T12:37:48Z")
Please can someone explain what these two values for COP mean? What is the value in brackets? As an aside - if I take the reported 829kWh for output and divide by the 234kWh for input, I get 3.542, not 3.55. What is… --- ## [Heat pump startups vs. ambient temp graph/analysis - does this tool exist?](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473)
**Author:** [@John](https://community.openenergymonitor.org/u/John)\ **Replies:** 2\ **Last updated:** [13 December 2025 11:12 UTC](https://community.openenergymonitor.org/t/heat-pump-startups-vs-ambient-temp-graph-analysis-does-this-tool-exist/29473 "2025-12-13T11:12:28Z")
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. N… --- ## [Improving heat pump efficiency : circulation pump on Mitsubishi Ecodan](https://community.openenergymonitor.org/t/improving-heat-pump-efficiency-circulation-pump-on-mitsubishi-ecodan/23297)
**Author:** [@richb99999](https://community.openenergymonitor.org/u/richb99999)\ **Replies:** 29\ **Last updated:** [27 November 2023 20:17 UTC](https://community.openenergymonitor.org/t/improving-heat-pump-efficiency-circulation-pump-on-mitsubishi-ecodan/23297 "2023-11-27T20:17:07Z")
Hi, I have just got the monitoring system working on our Mitsubishi Ecodan air source heat pump, and am getting my head around all the lovely data. I was surprised to see that the circulation pump (which uses 150W) see… --- ## [Heatpumpmonitor.org: Includes indoor temperature sensing](https://community.openenergymonitor.org/t/heatpumpmonitor-org-includes-indoor-temperature-sensing/29438)
**Author:** [@njh](https://community.openenergymonitor.org/u/njh)\ **Replies:** 3\ **Last updated:** [24 November 2025 09:11 UTC](https://community.openenergymonitor.org/t/heatpumpmonitor-org-includes-indoor-temperature-sensing/29438 "2025-11-24T09:11:17Z")
I have just been reviewing my system settings on heatpumpmonitor.org and noticed that there are some new options/settings (also photos!) and also some corrections to make for my system. Please can you clarify the follow… --- ## [🥳 New features on HeatPumpMonitor.org Nov25: System photos + more](https://community.openenergymonitor.org/t/new-features-on-heatpumpmonitor-org-nov25-system-photos-more/29397)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 6\ **Last updated:** [15 November 2025 23:48 UTC](https://community.openenergymonitor.org/t/new-features-on-heatpumpmonitor-org-nov25-system-photos-more/29397 "2025-11-15T23:48:19Z")
:camera: System Photos: It’s now possible to upload images of installations! This is a much requested feature, being able to see photos of the installations should add lots of additional context and learning opportuniti… --- ## [Fluctuating flow and heat output](https://community.openenergymonitor.org/t/fluctuating-flow-and-heat-output/29313)
**Author:** [@deano](https://community.openenergymonitor.org/u/deano)\ **Replies:** 17\ **Last updated:** [7 November 2025 16:13 UTC](https://community.openenergymonitor.org/t/fluctuating-flow-and-heat-output/29313 "2025-11-07T16:13:55Z")
So, I wouldn’t have seen the below without heatpump monitor. It hasn’t done this before (minor fluctuations - nothing this erratic). I’ve bled the system on the buffer tank, very little air came out and the system rema… --- ## [Trying to understand Start/Stop conditions of my (vallaint) heat pump](https://community.openenergymonitor.org/t/trying-to-understand-start-stop-conditions-of-my-vallaint-heat-pump/29309)
**Author:** [@bandeiri](https://community.openenergymonitor.org/u/bandeiri)\ **Replies:** 0\ **Last updated:** [29 October 2025 15:36 UTC](https://community.openenergymonitor.org/t/trying-to-understand-start-stop-conditions-of-my-vallaint-heat-pump/29309 "2025-10-29T15:36:04Z")
Hello all, I’m new to this forum and I would like to start monitoring all the different “variables/parameters” of my vaillant heatpump I’ve a working ebusd where I can read all the different variables directly from the… --- ## [USB-attached EmonTX5s lose connectivity with EmonCMS/EmonHP](https://community.openenergymonitor.org/t/usb-attached-emontx5s-lose-connectivity-with-emoncms-emonhp/29059)
**Author:** [@JohnM](https://community.openenergymonitor.org/u/JohnM)\ **Replies:** 10\ **Last updated:** [17 October 2025 17:51 UTC](https://community.openenergymonitor.org/t/usb-attached-emontx5s-lose-connectivity-with-emoncms-emonhp/29059 "2025-10-17T17:51:50Z")
I have an EmonPi2 (I believe technically running the EmonHP firmware, for some reason) with an attached Anker USB hub. Attached to the hub are 6 12-port EmonTX5s. Exactly two of EmonTX5s lose connectivity to the main un… --- ## [Heat Meter Location](https://community.openenergymonitor.org/t/heat-meter-location/28826)
**Author:** [@Ben\_Barker](https://community.openenergymonitor.org/u/Ben_Barker)\ **Replies:** 24\ **Last updated:** [27 September 2025 07:13 UTC](https://community.openenergymonitor.org/t/heat-meter-location/28826 "2025-09-27T07:13:20Z")
I’m in the process of having a heat pump installed, but the space is very tight. Currently the flow meter is installed near to the hot water tank, with about 20cm above before the next bend, and about 30cm below before a… --- ## [MIssing data on Heatpumpmonitor.org](https://community.openenergymonitor.org/t/missing-data-on-heatpumpmonitor-org/29030)
**Author:** [@Felix](https://community.openenergymonitor.org/u/Felix)\ **Replies:** 5\ **Last updated:** [28 August 2025 11:46 UTC](https://community.openenergymonitor.org/t/missing-data-on-heatpumpmonitor-org/29030 "2025-08-28T11:46:03Z")
Hello I’m new to this forum. I’ve been assessing local Emomcms data on my PC since 05/12/2024 for my system. Locally I can view all the data whereas on Heatpumpmonito.org it only shows 10 days worth. I’ve manually reload… --- ## [SSH to a new emonpi2 (Heatpump level 3) / Heat meter not detected](https://community.openenergymonitor.org/t/ssh-to-a-new-emonpi2-heatpump-level-3-heat-meter-not-detected/29032)
**Author:** [@rvangraan](https://community.openenergymonitor.org/u/rvangraan)\ **Replies:** 3\ **Last updated:** [27 August 2025 16:45 UTC](https://community.openenergymonitor.org/t/ssh-to-a-new-emonpi2-heatpump-level-3-heat-meter-not-detected/29032 "2025-08-27T16:45:20Z")
Hi guys, I’ve been working on commissioning my new EmonPi2 (Heatpump monitor level 3). Unfortunately it is not seeing the flow meter and I need to SSH to the pi to see what is going on with the serial ports. 2025-08-2… --- ## [Import local heatpump data to emoncms.org/heatpumpmonitor.org](https://community.openenergymonitor.org/t/import-local-heatpump-data-to-emoncms-org-heatpumpmonitor-org/28777)
**Author:** [@FredM67](https://community.openenergymonitor.org/u/FredM67)\ **Replies:** 1\ **Last updated:** [1 July 2025 09:21 UTC](https://community.openenergymonitor.org/t/import-local-heatpump-data-to-emoncms-org-heatpumpmonitor-org/28777 "2025-07-01T09:21:36Z")
Hi, Is there a way to export all my heatpumpmonitor data from my local emoncms to emoncms.org ? If possible, how ? @TrystanLea @dMb Fred --- ## [I messed up my heat pump settings. Willing to pay someone to guide me through](https://community.openenergymonitor.org/t/i-messed-up-my-heat-pump-settings-willing-to-pay-someone-to-guide-me-through/28597)
**Author:** [@damspt](https://community.openenergymonitor.org/u/damspt)\ **Replies:** 8\ **Last updated:** [15 May 2025 06:21 UTC](https://community.openenergymonitor.org/t/i-messed-up-my-heat-pump-settings-willing-to-pay-someone-to-guide-me-through/28597 "2025-05-15T06:21:44Z")
Been trying to find out how to do weather curve settings and then i messed up everything :innocent: Model: Panasonic WH-MDC05J3E5 --- ## [Performance of 9kW Daikin](https://community.openenergymonitor.org/t/performance-of-9kw-daikin/25243)
**Author:** [@squarepeg77](https://community.openenergymonitor.org/u/squarepeg77)\ **Replies:** 212\ **Last updated:** [18 April 2025 11:36 UTC](https://community.openenergymonitor.org/t/performance-of-9kw-daikin/25243 "2025-04-18T11:36:10Z")
I’ve got a 9kW Daikin system, installed by Octopus. With the help of members here, I’m monitoring it using ESPAltherma and a CT connected to a MyEnergi Eddi. The data is logged to Home Assistant and published to emoncms … --- ## [Lack of data on heatpumpmonitor site](https://community.openenergymonitor.org/t/lack-of-data-on-heatpumpmonitor-site/28329)
**Author:** [@Martin\_Brown](https://community.openenergymonitor.org/u/Martin_Brown)\ **Replies:** 4\ **Last updated:** [27 March 2025 08:36 UTC](https://community.openenergymonitor.org/t/lack-of-data-on-heatpumpmonitor-site/28329 "2025-03-27T08:36:37Z")
Can anyone suggest as to why I can only see 35 days length of data on heatpumpmonitor even though Emomcms has been running for 113 days? Thanks --- ## [Octopus Cosy 9 Vs 9kW Daikin Vs boiler](https://community.openenergymonitor.org/t/octopus-cosy-9-vs-9kw-daikin-vs-boiler/27981)
**Author:** [@emosyne](https://community.openenergymonitor.org/u/emosyne)\ **Replies:** 26\ **Last updated:** [24 March 2025 20:15 UTC](https://community.openenergymonitor.org/t/octopus-cosy-9-vs-9kw-daikin-vs-boiler/27981 "2025-03-24T20:15:22Z")
Hello all. I have a condensing boiler that works well and is quite economical to run. It’s 11 years old and I thought I would replace it with a heat pump. Got a quote with Octopus and it’s very cheap. They were proposin… --- ## [Advanced Filtering on heatpumpmonitor.org](https://community.openenergymonitor.org/t/advanced-filtering-on-heatpumpmonitor-org/28171)
**Author:** [@kamilfb](https://community.openenergymonitor.org/u/kamilfb)\ **Replies:** 3\ **Last updated:** [6 March 2025 16:30 UTC](https://community.openenergymonitor.org/t/advanced-filtering-on-heatpumpmonitor-org/28171 "2025-03-06T16:30:40Z")
Hi everyone, Advanced filtering is now live on heatpumpmonitor.org - here’s what’s new! Additional filtering operators New side panel for viewing and editing filters Search or look up filter fields/columns Choos… --- ## [Connecting emonTH to emonHP (emonpi 2 - rasp4)](https://community.openenergymonitor.org/t/connecting-emonth-to-emonhp-emonpi-2-rasp4/28070)
**Author:** [@Durruti](https://community.openenergymonitor.org/u/Durruti)\ **Replies:** 7\ **Last updated:** [5 March 2025 09:56 UTC](https://community.openenergymonitor.org/t/connecting-emonth-to-emonhp-emonpi-2-rasp4/28070 "2025-03-05T09:56:38Z")
I’m returning to the OEM world after an absence, with the excellent emonHP (supplied fully set up), so forgive me if I’m missing something obvious. I have two emonTH units, that I’d like to connect to show room temperatu… --- ## [No readings on Emoncms; 'Error' on EmonPi2 HeatpumpMonitor](https://community.openenergymonitor.org/t/no-readings-on-emoncms-error-on-emonpi2-heatpumpmonitor/27846)
**Author:** [@bertie.dixon](https://community.openenergymonitor.org/u/bertie.dixon)\ **Replies:** 2\ **Last updated:** [28 January 2025 09:36 UTC](https://community.openenergymonitor.org/t/no-readings-on-emoncms-error-on-emonpi2-heatpumpmonitor/27846 "2025-01-28T09:36:51Z")
Hi, I have an EmonPi2 on a site; it was working fine for about 2 weeks, then data stopped flowing to Emoncms. Looking at the EmonPi2 screen it says : “Heat pump: error Electricity: error” Heat meter appears to be re… --- ## [Pushing for COP 5 on Daikin EDLA08E2V3](https://community.openenergymonitor.org/t/pushing-for-cop-5-on-daikin-edla08e2v3/25446)
**Author:** [@KnightPhoenix](https://community.openenergymonitor.org/u/KnightPhoenix)\ **Replies:** 39\ **Last updated:** [27 January 2025 23:42 UTC](https://community.openenergymonitor.org/t/pushing-for-cop-5-on-daikin-edla08e2v3/25446 "2025-01-27T23:42:42Z")
I am looking at my heatpump and I can see it keeps ramping up and down. While it is not cycling and the COP is pretty good I feel if I could get this under control it would be even better. Currently set to room stat (M… [Next page](https://community.openenergymonitor.org/tag/heatpumpmonitor/133.md?match_all_tags=true&page=1&tags%5B%5D=heatpumpmonitor)