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Havenwise App Help & Forum Support – Get the Most from Your Heat Pump

 
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Electricity, Tariffs, Monitoring & Providers
Last Post by HCas 3 weeks ago
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Joined: 4 years ago
Posts: 1605
14/10/2025 4:21 pm  

Posted by: @plasfron
↑

@majordennisbloodnok On line Heat Pump discussion groups. Why?

Nothing sinister, @plasfron. It's just that we've had a few discussions around what Havenwise does over and above manufacturer's boxes of tricks and found the level of intelligence shown by their systems to be significantly higher. Whether that translates into significant savings is, of course, another matter and often specific to each customer's situation, but what you heard suggested didn't seem to ring quite true with this forum.

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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 davidnolan22
(@davidnolan22)
Reputable Member Member
Joined: 1 year ago
Posts: 136
14/10/2025 6:03 pm  

Hi, I've always found Henri to be super helpful.  From a sales point of view, if I was on a fixed price tariff, what would havenwise do that auto adapt didn't?



   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 692
15/10/2025 6:24 am  

Posted by: @plasfron
↑

@majordennisbloodnok On line Heat Pump discussion groups. Why?

@plasfron can you supply links to the "Online Heat Pump discussion groups" you refer to, please?

 


Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.


   
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 plasfron
(@plasfron)
Active Member Member
Joined: 12 months ago
Posts: 9
15/10/2025 9:08 am  

@majordennisbloodnok Suggest you have a word with Henri Casteleyn who has contributed to those discussions..



   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
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Joined: 4 years ago
Posts: 1605
15/10/2025 9:17 am  

Posted by: @plasfron
↑

@majordennisbloodnok Suggest you have a word with Henri Casteleyn who has contributed to those discussions..

Yes, @plasfron; Henri's a good guy to talk to. I've had several conversations with him in the past and he's been very open and helpful.

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 692
15/10/2025 9:22 am  

Posted by: @plasfron
↑

@majordennisbloodnok Suggest you have a word with Henri Casteleyn who has contributed to those discussions..

@plasfron

But can you please provide a link to those discussions? I would like to see the discussions you speak of.

 


Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.


   
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 HCas
(@hcas)
Reputable Member Member
Joined: 2 years ago
Posts: 132
15/10/2025 10:15 am  

@plasfron On your question on the setup process. It's pretty straightforward. You download the Havenwise app and just follow the steps in the app to complete the setup. Should be quick and self-explanatory. Part of the process is indeed linking Melcloud to Havenwise.


CEO and co-founder at HavenWise


   
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 HCas
(@hcas)
Reputable Member Member
Joined: 2 years ago
Posts: 132
15/10/2025 10:24 am  

On the broader question about how Havenwise is different from Mitsubishi's Auto Adapt (AA) / Melcloud / FTC (the Mitsubishi controller) / Home assistant, see below a (lengthy) answer.

Depending on your situation, some of these points might be more or less relevant of course! Only you can be the judge of that.

1. It's easier to use. Big factor for a lot of our users.

2. If you want Havenwise to take into account your tariff, it will actually calculate how much it should make use of the cheap periods. There is a balance between making use of cheap electricity, efficiency, and comfort. Sometimes it makes sense to "pre-heat" the home by 0.2C, sometimes by 0.5C, sometimes by 0.7C, etc. Havenwise will continuously calculate this. The only thing AA does is reacting to your setpoint versus measured room temperature. Who knows whether you should set it 0.5C, 1C, or 2C above your normal temperature for optimal results? And we know that the optimal scenario actually changes day by day.

3. If you change your tariff, you need to rethink and change your schedules with AA. Not with Havenwise.

4. If you don't want Havenwise to take into account your tariff, Havenwise will automatically calculate the optimal setbacks, for instance overnight or during the day when nobody is home.

5. My understanding is that AA doesn't change the flow temperatures very much. So the benefit with tariffs might be limited.

6. I've seen reports that AA "forgets" what it learns in some circumstances.

7. I've seen setups where AA just doesn't work. It seems to particularly struggle with underfloor heating.

8. AA only works when you have the FTC or a wireless Mitsi stat in a suitable location picking up a representative temperature. Not a requirement for Havenwise and we have a workaround for those situations.

9. Havenwise also optimises the hot water. We have a blog post on this here: https://www.havenwise.co.uk/news/customer-case-study-perry

10. In our app, we report COP and actual cost (in £). More data is planned.

11. We pride ourselves on excellent customer support.

12. We continuously improve our app and the algorithms. So the product stays modern, and only gets better with time. I believe Melcloud hasn't received a real update in at least 6-7 years. I am aware they have a new "Melcloud Home" coming but our tests show it's not much different from the existing Melcloud app.

Hope this answers some questions!


CEO and co-founder at HavenWise


   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 692
15/10/2025 10:32 am  

@hcas 

Thank you.


Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.


   
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bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 4 years ago
Posts: 1002
17/10/2025 2:56 pm  

@hcas Hi, I have been asked to get an old 14kW Ecodan installation working efficiently. Its in a care home and apart from being oversized it seems to be installed reasonably well with good insulation and no buffer I can see, so the main issue would be to fine tune the WC curve. I would prefer if this could be done without involving the care home staff.

20251016 103636

Will havenwise work with this heatpump, and what do I need to do to progress?

Thanks Mark


House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
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 HCas
(@hcas)
Reputable Member Member
Joined: 2 years ago
Posts: 132
17/10/2025 3:02 pm  

@bontwoody If you can get it connected to Melcloud, it should work with Havenwise. You would need the Mitsubishi MELCloud Wi-Fi Interface if that is not in place yet. 

Might be worth double checking with Mitsubishi to see if it can be connected to Melcloud, given the age of the unit.


CEO and co-founder at HavenWise


   
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bontwoody
 bontwoody
(@bontwoody)
Noble Member Contributor
Joined: 4 years ago
Posts: 1002
17/10/2025 3:04 pm  

@hcas OK Thanks. Will do.


House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60


   
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