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Assessing Heatmiser Neostat Accuracy: How and Why to Calibrate Them

Mars · 2024-03-26T15:56:53Z

Moving into our home brought the advantage of an already installed underfloor heating system, regulated by Heatmiser Neostats. These devices, promising precise control and energy efficiency, became a focal point of curiosity about their accuracy in temperature regulation after it was raised on a recent YouTube we posted. To assess this, I used a FLIR ONE thermal imaging camera to compare the thermostat readings against the actual environmental temperatures across different heating zones.The process unveiled unexpected discrepancies between the Neostats' temperature readings and the thermal camera's more accurate measurements. Additionally, it highlighted hot spots within the thermostat units, potentially influencing the accuracy of the readings and, by extension, the effectiveness of our home's heating system. Motivated by our findings, we recalibrated our Heatmiser Neostat thermostats. How to Recalibrate Heatmiser Neostat Thermostats

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Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

Last Post by Mars 2 years ago

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Morgan

(@morgan)

Noble Member Member

Joined: 5 years ago

Posts: 698

29/03/2024 11:15 am

Posted by: @editor

↑

@morgan we intend to document everything and show the difference. Where in the UK are you based?

@editor Derbyshire.

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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SKD

(@skd)

Trusted Member Member

Joined: 4 years ago

Posts: 63

03/04/2024 10:47 am

Posted by: @morgan

↑

I had a Heatmiser Neostat installed with my Ecodan. I was told, I think, by Brendon that it was a simple on-off switch not suited to ASHP control. He advised stripping it out and installing Mitsubishi components. I did exactly that.

Same for us. Our Ecodan now runs on WC with all emitters fully open. Neostats are now used for monitoring only.

Mitsubishi Ecodan 11.2kW R32 ASHP; Ecodan DHW cylinder; UFH+rads
20x430W Jinko TOPCON Tiger Neo solar; Luxpower 6+4kW hybrid inverter; 20kWh Hanchu ESS LFP battery storage
PHEV; Zappi charger
1997 stone detached house with updated insulation. 140sqm, maintained at 20-22degC 24/7

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Mars

(@editor)

Illustrious Member Admin

Joined: 5 years ago

Posts: 4551

Topic starter 04/04/2024 3:03 pm

@Morgan I'm still looking into this for you – the competent installers that are near you don't do "repair" work yet – they just want to full installs. I have, however, been given two names of installers that are very reputable – if/when they reply, I'll put them in touch with you.

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Morgan

(@morgan)

Noble Member Member

Joined: 5 years ago

Posts: 698

04/04/2024 3:20 pm

Posted by: @editor

↑

@Morgan I'm still looking into this for you – the competent installers that are near you don't do "repair" work yet – they just want to full installs. I have, however, been given two names of installers that are very reputable – if/when they reply, I'll put them in touch with you.

@editor
That's very kind. I've made contact via two websites here and had no reply so I suspect that they too are only interested in full installs. Frustrating.

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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Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

04/04/2024 4:18 pm

Posted by: @morgan

↑

Posted by: @editor

↑

@Morgan I'm still looking into this for you – the competent installers that are near you don't do "repair" work yet – they just want to full installs. I have, however, been given two names of installers that are very reputable – if/when they reply, I'll put them in touch with you.

@editor

That's very kind. I've made contact via two websites here and had no reply so I suspect that they too are only interested in full installs. Frustrating.

I suspect the reason may be that there is no grant that can be applied to repair work, so no opportunity to bump up the price. 🙄

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Toodles

(@toodles)

Famed Member Contributor

Joined: 4 years ago

Posts: 2731

04/04/2024 5:13 pm

@derek-m Oh you cynic you! (And I think you are very close to the truth there!) 😵‍💫 Toodles.

Toodles, heats his home with cold draughts and cooks food with magnets.

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Mars

(@editor)

Illustrious Member Admin

Joined: 5 years ago

Posts: 4551

Topic starter 05/04/2024 12:05 pm

@Morgan I've just sent you a DM with the details of @adrian-liddell from Busy Energy who comes highly recommended by other installers that we trust. I will let you contact Adrian and see if this is a project he can assist you with.

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