# \#grantr290 **URL:** https://community.openenergymonitor.org/tag/grantr290/669.md [Latest](https://community.openenergymonitor.org/latest.md) · [Categories](https://community.openenergymonitor.org/categories.md) · [Tags](https://community.openenergymonitor.org/tags.md) --- ## [New heat pump Grant R290 - hot water advice](https://community.openenergymonitor.org/t/new-heat-pump-grant-r290-hot-water-advice/28254)
**Author:** [@Durruti](https://community.openenergymonitor.org/u/Durruti)\ **Replies:** 214\ **Last updated:** [23 October 2026 10:15 UTC](https://community.openenergymonitor.org/t/new-heat-pump-grant-r290-hot-water-advice/28254 "2026-10-23T10:15:20Z")
Hi folks, We’ve had our heat pump in for a month and I’m wanting to make sure that my schedules are correct. Current DHW setup is: Setpoint 45C, Schedule 1am - 3.30am but water isn’t getting up to temp and COP is low at… --- ## [Grant Aerona R290 - space heating advice and settings](https://community.openenergymonitor.org/t/grant-aerona-r290-space-heating-advice-and-settings/30435)
**Author:** [@riwaller](https://community.openenergymonitor.org/u/riwaller)\ **Replies:** 24\ **Last updated:** [23 October 2026 00:46 UTC](https://community.openenergymonitor.org/t/grant-aerona-r290-space-heating-advice-and-settings/30435 "2026-10-23T00:46:16Z")
As we get into the heating season, I’d be interested to learn from others about how best to optimise the Grant Aerona R290 ASHP and to find out what other settings folk are using. I’ve got a 6.5 kW unit and I’m currently… --- ## [Sudden drop in heat output during hot water cycle for Grant HP290 on silent level 2](https://community.openenergymonitor.org/t/sudden-drop-in-heat-output-during-hot-water-cycle-for-grant-hp290-on-silent-level-2/30139)
**Author:** [@riwaller](https://community.openenergymonitor.org/u/riwaller)\ **Replies:** 30\ **Last updated:** [20 October 2026 08:11 UTC](https://community.openenergymonitor.org/t/sudden-drop-in-heat-output-during-hot-water-cycle-for-grant-hp290-on-silent-level-2/30139 "2026-10-20T08:11:26Z")
Having just had a heat pump install comprising a 6.5kW Grant Aerona R290 paired with a 250 litre Newark super cylinder, this is my first post and I wanted to start by saying it’s great to have the chance to join the OEM … --- ## [Grant R290 Pump Oscillation](https://community.openenergymonitor.org/t/grant-r290-pump-oscillation/30322)
**Author:** [@MrW](https://community.openenergymonitor.org/u/MrW)\ **Replies:** 10\ **Last updated:** [19 October 2026 20:37 UTC](https://community.openenergymonitor.org/t/grant-r290-pump-oscillation/30322 "2026-10-19T20:37:02Z")
I’ve noticed a possibly odd situation since the ASHP has started to do heating again, before it actually kicks in my flow rate starts oscillating like below, taken from 11th Sep 2026: And the fan starts to pulse on a… --- ## [Grant Heat Pump Real World Outputs](https://community.openenergymonitor.org/t/grant-heat-pump-real-world-outputs/30455)
**Author:** [@flowtechheating](https://community.openenergymonitor.org/u/flowtechheating)\ **Replies:** 22\ **Last updated:** [19 October 2026 14:07 UTC](https://community.openenergymonitor.org/t/grant-heat-pump-real-world-outputs/30455 "2026-10-19T14:07:09Z")
Hi, Can anyone shed any light as to what the real world outputs are on the 4, 6.5 and 9KW Grant R290 heat pumps when in a -3 winters day? Are they performing to the badge or falling a little short. I have a job at presen… --- ## [Grant Aerona HP290 Performance Update](https://community.openenergymonitor.org/t/grant-aerona-hp290-performance-update/30334)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 12\ **Last updated:** [17 October 2026 19:39 UTC](https://community.openenergymonitor.org/t/grant-aerona-hp290-performance-update/30334 "2026-10-17T19:39:02Z")
It’s now been over a year since I installed a Grant Aerona HP290 heat pump in my house to replace an Oil combi boiler, I’ve recently published a video update about the performance so far: TLDR: it’s working well, house … --- ## [Grant Aerona R290 Short Cycling](https://community.openenergymonitor.org/t/grant-aerona-r290-short-cycling/30462)
**Author:** [@germarsh](https://community.openenergymonitor.org/u/germarsh)\ **Replies:** 11\ **Last updated:** [17 October 2026 13:05 UTC](https://community.openenergymonitor.org/t/grant-aerona-r290-short-cycling/30462 "2026-10-17T13:05:58Z")
Sorry I haven’t been on this forum for a while. It has been a learning curve compared with an older IVT GSHP. Many more sensors and not helped by three “circuits”. Firstly, a general description of the hydraulic and ele… --- ## [Grant HP290 Enable Cooling Support ✅](https://community.openenergymonitor.org/t/grant-hp290-enable-cooling-support/30030)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 49\ **Last updated:** [5 October 2026 16:20 UTC](https://community.openenergymonitor.org/t/grant-hp290-enable-cooling-support/30030 "2026-10-05T16:20:14Z")
Despite what the manufacturer says the Grant HP290 actually supports cooling ‘out-of-the-box’! Thanks to @LeeNuss for figuring this out, I followed his instructions and it works :grin: These steps are copied from @Le… --- ## [Reading onboard data from Grant Aerona HP290 + Control](https://community.openenergymonitor.org/t/reading-onboard-data-from-grant-aerona-hp290-control/29271)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 45\ **Last updated:** [17 September 2026 08:48 UTC](https://community.openenergymonitor.org/t/reading-onboard-data-from-grant-aerona-hp290-control/29271 "2026-09-17T08:48:10Z")
The Grant Aerona HP290 heat pump uses a Plum ecoMAX360i touch screen controller. It’s a good controller and works well. The Grant HP290 must be the easiest heat pump to integrate with, no special cables or hardware i… --- ## [Grant R290 optimisation (flow rate, limiting cycling)](https://community.openenergymonitor.org/t/grant-r290-optimisation-flow-rate-limiting-cycling/29924)
**Author:** [@petch](https://community.openenergymonitor.org/u/petch)\ **Replies:** 7\ **Last updated:** [10 September 2026 12:42 UTC](https://community.openenergymonitor.org/t/grant-r290-optimisation-flow-rate-limiting-cycling/29924 "2026-09-10T12:42:05Z")
Hi guys, I see there are a few Grant threads already but wasn’t sure on forum etiquette for starting a new thread vs hijacking an existing one I’ve had the heat pump for a few days now and have a few questions First so… --- ## [Econext: Direct local control of Grant HP290 Econet replacement (Plum ecoMAX360i)](https://community.openenergymonitor.org/t/econext-direct-local-control-of-grant-hp290-econet-replacement-plum-ecomax360i/29758)
**Author:** [@LeeNuss](https://community.openenergymonitor.org/u/LeeNuss)\ **Replies:** 65\ **Last updated:** [16 August 2026 13:27 UTC](https://community.openenergymonitor.org/t/econext-direct-local-control-of-grant-hp290-econet-replacement-plum-ecomax360i/29758 "2026-08-16T13:27:36Z")
I’ve finally managed to get the port working, so I can publish the code :slight\_smile: In case anyone is interested in getting this set up, here’s some instructions, the readme’s in the github repos have a bit more info… --- ## [Running Econext on an emonHP / emonPi](https://community.openenergymonitor.org/t/running-econext-on-an-emonhp-emonpi/30097)
**Author:** [@Cillian\_Cahill](https://community.openenergymonitor.org/u/Cillian_Cahill)\ **Replies:** 4\ **Last updated:** [3 July 2026 19:56 UTC](https://community.openenergymonitor.org/t/running-econext-on-an-emonhp-emonpi/30097 "2026-07-03T19:56:43Z")
Hey Glyn, Looking to start dabbling in home assist and using Leenuss’s gateway for the Grant unit. Im getting the HA green pi, just wondering if we’re allowed to install his gateway on the OEM PI? If I order a 3rd pi … --- ## [emonHub Integration for Grant HP290 (EcoNet300)](https://community.openenergymonitor.org/t/emonhub-integration-for-grant-hp290-econet300/29760)
**Author:** [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Replies:** 0\ **Last updated:** [18 February 2026 13:50 UTC](https://community.openenergymonitor.org/t/emonhub-integration-for-grant-hp290-econet300/29760 "2026-02-18T13:50:16Z")
Thanks to @dconlon it’s now possible to read data from Grant HP290 heat pump (econet300) locally via HTTP using just emonHub :partying\_face: After updating to master branch of emonHub, just add the following emonhub con… --- ## [Grant aerona R290 dumb controller: Manual DST Time Update Required](https://community.openenergymonitor.org/t/grant-aerona-r290-dumb-controller-manual-dst-time-update-required/29298)
**Author:** [@GSV3MiaC](https://community.openenergymonitor.org/u/GSV3MiaC)\ **Replies:** 2\ **Last updated:** [5 November 2025 23:06 UTC](https://community.openenergymonitor.org/t/grant-aerona-r290-dumb-controller-manual-dst-time-update-required/29298 "2025-11-05T23:06:05Z")
My Grant ‘smart controller’ is the only bit of smart hardware in the whole house which failed to automagically adjust for the end of BST. If you have one you might want to check what it thinks the time is. Is there a se…