Weather compensation

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• 24 Feb, '20
  AP

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  I would like to add some detail of how this could be done and the benefits:
  Implementation: This can be done solely server side and be an option on the app to opt in. If the user opts in then the Optimun start could changed and pushed down to the Stat based on the local weather. The roll out would via an update to the app.
  Benefits: All existing users and allow improved sales as this question comes up a lot esp as Geo location is supported. Climate change contribution.

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• 08 Dec, '19
  Jit

  This is a great idea. This would help with slow heating systems such as underfloor heating greatly. On cold days with little sunlight being able to start the underfloor heating earlier so that temperature is good for the morning. Also, turning off the underfloor heating early when it's going to get warmer / sunny can make a big difference and currently causes overshoots on my target temperature.

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• 31 Jan, '20
  TF

  I agree for the reasons above and in addition, I'm looking to use a Bivalent system.
  An ASHP alone is not an option for our property so we need to keep the oil boiler for when we get a 'cold snap'. I therefore need a way of controlling when the oil boiler would come on.
  I like Heatmiser kit so would be great to see a weather compensatory as a product.

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• 31 May, '20
  Pete Merged

  This function would be great for me, particularly if you could trigger zones under certain temperature conditions. For instance with a heat pump struggling when it’s less than 5 degrees outside I want to turn on the towel radiators.

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• 21 Nov, '20
  Steve

  Would be very useful

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• 21 Jan, '21
  Jez Thorpe

  Having lots of glass in out house having an external temperature would be a great help and improve the flexibility of the app

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• 02 Feb, '21
  Alastair smith Merged

  External weather monitoring could connect to adjusted preheat settings, so if it’s cold the system might pre warm for longer thus increasing the chances of hitting set temperatures during the times zones are in use

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• 16 Feb, '21
  Mak

  100% agree with the above and the general move to Boiler Plus. Adding some sort of weather compensation (even if over internet forecasts) would be a great way to make an existing system more efficient. I imagine a solution exactly like AP has suggested.

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• 26 Feb, '21
  Pierre Hymas Merged

  I have moved from Nest thermostats which includes this feature and miss it on Heatmiser Neo system it would be a valuable addition.

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• 05 Mar, '21
  Andrew Hutchinson Merged

  This is something that I've thought about.... when it's super cold outside, my floors take much longer to get up to set temperature and sometimes don't even make it to the set heat. You would not need an outside sensor as the main hub could get the temperature from the web which would suffice. So with the new graphs, I better understand the pre heat but this looks like it only comes on 1 hour before. The pre heat could be extended up to 2 hours depending on the room temperature vs outside temperature.

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• 17 Mar, '21
  Lincoln

  This 'could' be a great benefit depending on how well the algorithm is written & performs. It could also be a pain. If you do this, please also include a toggle button in the app to turn Weather Comp on or off. Thanks. (Love most of your kit, by the way)!

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• 22 Mar, '21
  Michael

  This would be really cool and really useful.

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• 29 Mar, '21
  Nickkk

  Definitely a good idea!

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• 13 Aug, '21
  Bryan Cummings Merged

  Post by Andrew Hutchinson an excellent idea to make the system world class.

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• 25 Aug, '21
  Heatmiser R&D System

  "Outdoor sensor and weather comp facility" (suggested by Martyn Hale on 2020-05-23), including upvotes (34) and comments (5), was merged into this suggestion.

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• 11 Dec, '21
  Barry A

  Great idea! We have seven zones of underfloor heating and each react differently due to external doors patio windows and doors. Could the sensor be a modified NeoAir with an extended temperature range used in conjunction with a remote probe. The Neostat Air would be mounted inside and the probe placed in a external enclosure and this could be added to an existing system.

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• 03 Feb, '22
  Paul

  This gets a vote from me for all the reasons other folks have said. We have underfloor heating and having some form of weather compensation would make a huge difference to the system getting the temperatures much closer to the requested targets at the times requested.

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• 07 Sep, '22
  AP

  Hi,
  
  With the huge hike in the price of energy can Heatmiser prioritise this please. This was first suggested 30 months back.
  
  It will help Heatmiser sales and as a very practical benefit to customers.
  
  Please :-)

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• 10 Oct, '22
  David Ennion

  Yes, I would buy an external sensor to take advantage of weather compensation.

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• 03 Mar, '23
  David P

  Weather compensation would be a great help for me too.

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• 22 May, '23
  Tom

  This would make an absolutely huge improvement to the system because, given the very slow response times of underfloor heating, prediction is everything. Having unnecessary heating on overnight just to get to target temperature during the day when it's going to be warm anyway is a clear waste of energy and also causes overshoot. On the other hand, failing to predict a cold day and not preheating enough just leads to a cold house.
  
  Currently the only way I can see to even do this on a very slow seasonal basis is to manually change all the overnight set points through the year, and clearly you've got no chance with daily/weekly swings unless your main hobby in life is fiddling with the app...
  
  As others have said, assuming you used an internet forecast (which should be easily reliable enough for these purposes), it's all just a software release...

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• 13 Feb, '24
  Mick Marriott

  i have 11 zones / rooms and as previously said underfloor heating isn't an instant changeable heating system and the weather we have had in the last 2 / 3 months can fluctuate up to 10 degrees in a 24 hour cycle so i have been constantly on my app trying to balance the system which if we had a external probe that is linked to the app / stats this would be a game changer not only for the end-users but for you at Heatmiser as this would make your system the most accurate control on the market.

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• 06 Apr, '24
  John Rush

  Would be great as integration with heat pumps and flow temperatures is not easy.

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• 15 Oct, '24
  Rob

  Definitely needed. You should be able to set completely different heating profiles and timings based on outside temperature ranges. Not sure whether an outside temperature sensor or weather forecast lookup would be better... e.g. if temp plummets overnight but comes back quickly during the day then you might not want to react so quickly to a low outside temperature. Perhaps better if it looks at the average forecasted temperature through 6 hour windows. In my case I have a mix of underfloor and radiators. The best way I have found to deal with this is to set the floor to fixed floor temps, varied throughout the year and the radiators on thermostat as they react more quickly to temp changes. But still it would be great from a comfort and efficiency point of view to have the floor particularly automatically target different temperatures depending on outside temperature. Even better if it would also control the floor water temp thermostat too

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• 02 Jan, '25
  Paul

  Further to my recommendation in February 2022, I have been trying to find a way of making this work in the interim and now have some additional information to suggest is considered. Our particular system is paired with a Vaillant boiler and pressurised water cylinder. Vaillant offer weather compensation sensors and function for the boiler - however, we're unable to implement it as the boiler is unable to understand from the Heatmiser controls whether it's heating the water cylinder or the underfloor heating - therefore cannot maintain a safe heat for the water cylinder, while being efficient for the underfloor heating. I suggest, if this recommendation is taken forward, that too is taken into consideration.

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• 16 Jan, '25
  Alex Heylin

  All the data sources needed for this are already available in the system, please just write the algorithm and hook them in so this is available. Some heat sources, emitters, and heat loads have preheat times that vary a lot depending on external temperature. Using forecast temperature (and for bonus solar gain, which is estimable based on previous data) would be the optimum implementation, however as minimal viable product using the current outdoor temperature (read from existing Internet feed) to adjust preheat time would be an acceptable start and be more accurate than the current system, but less accurate than a more complex implementation.

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• 21 Jan, '25
  Alex Burman

  This smart room stat is excellent and from a tried and trusted name brand.
  If weather compensation via internet was added to the software and if it could be mounted on a stand with usb power, this would be an excellent replacement for the current very popular Google nest.
  Nest have pulled all products from the shelf for some reason, this would be a perfect opportunity to fill that market gap with very little competition.

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• 20 Aug, '25
  JR

  2025, and this suggestion from 6 years ago has still not been considered?

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• 12 Nov, '25
  Irida Zagkou

  Exciting News!
  We’re launching a limited trial of our new Smart Preheating Schedule, which uses weather compensation algorithms to adjust preheating times based on forecast and room conditions, improving comfort and energy efficiency.
  If you currently use preheating or want to try it, and would like to join the trial, please contact me and I will share more information. Your feedback will help us refine this feature!
  
  Email: spyridoula.zagkou@imi-hydronic.com

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