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Honeywell HomeExpert Digital thermostat

£36
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Product Details

Product Information

Features and Benefits

The THR840 is a digital room thermostat that is more accurate than a mechanical room thermostat. Measurements from an electronic sensor are compared with your desired temperature and advanced control software is used to maintain the temperature in an energy efficient manner. ​​​

  • ECO Button for energy saving - ECO button provides timed temperature setback to reduce energy demand
  • System Control - heating and cooling functions from 5°C to 35°C
  • Precise Temperature Control - typically accurate to within 0.5°C for maximum comfort
  • Energy Efficient - uses TPI (Time Proportional & Integral) control which makes boilers operate more efficiently and provides close accurate control. It also has a self learning adaptive capability
  • Ideal for Combi-Boilers - volt free connections are ideal for use with combination boilers or heating zones
  • Easy to install - installation guide included, takes 15 minutes to install

Technical Specifications

BrandHoneywell
Minimum temperature range5 °C
Maximum temperature range35°C
ModelTHR840DUK
Pack quantity1
Product code5017490588371

Reviews

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3.8 / 5(10 reviews)

Basic and does the job

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Readysalted32 - 4 months ago

Bought this today and took 5 minutes to swap over from an old 'analogue' type with a temperature dial. You only need two wires which is what most old stats will have connected to them.

Noise

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TG tips - 8 months ago

Works ok but it’s very noisy and clicks regularly even when switched off. It’s very annoying and I think it will have to go into the bin.

Digital features Awsome

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Flubber - 1 year ago

Bought 2 weeks ago looks great and so easy to fit well worth the price

Looks good but fails to deliver

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Evil Uncle Mikey - 1 year ago

Bought to replace mechanical thermostat.
Installation in 15 minutes (it says!!) - I couldn't even disassemble the unit in 15 minutes. I ended up mangling the case as I failed to have the 3rd, 4th and 5th hands necessary.
When it comes to removal of the unit - it'll have t be wrenched off the wall as it's not possible to get access to the sprung lugs from outside the unit.
In operation - it clicks loudly like a set of frenetic castanets. Just too sensitive ..
A waste of money. Will be replaced with something else.

Like the big numbers ,goes up in halfs also

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Waitesey - 1 year ago

I bought this a month ago , very good the only bad about it , our bedroom is right next to it and you can hear it click on and off !

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