# Vaillant inbuilt monitoring vs MID meters

**URL:** <https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230>\
**Category:** Heatpump\
**Tags:** heatpumpmonitor\
**Created:** [23 August 2023 08:36 UTC](https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230 "2023-08-23T08:36:31Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![fluppie007](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/f/3ab097/32.png) [@fluppie007](https://community.openenergymonitor.org/u/fluppie007)\
**Post date:** [23 August 2023 08:57 UTC](https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230/2 "2023-08-23T08:57:55Z")

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Hi Trystan, great timing, I just have mine in use and could also invite you to have a look to my newly made topic [New GSHP installation Vaillant VWF 58/4 with integrated DHW cylinder, 140m deep vertical loop](https://community.openenergymonitor.org/t/new-gshp-installation-vaillant-vwf-58-4-with-integrated-dhw-cylinder-140m-deep-vertical-loop/24227)

I’m seeing quite some difference between calculated heat/cooling and the heat reported by the unit.

If you like, you can also take a look to the data, started logging since yesterday: [http://els23.dyndns.tv:8888/Energie/app/view?name=VaillantVWF584230V](http://els23.dyndns.tv:8888/Energie/app/view?name=VaillantVWF584230V)  
This one is using the calculated heat based on flow rate and delta T.  
I also have quite some feeds opened publicly, like the reported COP by the Vaillant unit.

A second one where I use the heat output reported by the Vaillant unit over eBUS:  
[http://els23.dyndns.tv:8888/Energie/app/view?name=VaillantVWF584\_ebusd\_data](http://els23.dyndns.tv:8888/Energie/app/view?name=VaillantVWF584_ebusd_data)

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_[View the full topic](https://community.openenergymonitor.org/t/vaillant-inbuilt-monitoring-vs-mid-meters/24230)._