Honeywell DT90E Digital Room Thermostat + ECO Product Code: 41365

Includes ECO button with countdown display for energy saving mode. CE marked. Conforms to protection requirements of 2006/95/EC & 2004/108/EC. WEEE & RoSH compliant.


  • Digital Display
  • Mains or Low Voltage Switching
  • 1 Year Guarantee
  • Mains or Low Voltage Switching


Switch/contact rating: SPDT. 8A. Temp. range: 5°-35°C. H x W x D: 92 x 90 x 29mm. 2 x AA batteries supplied.
Additional Information
Technical Specification
  • Brand : Honeywell
  • Product Height : 92 mm
  • Display Type : Digital Display
  • Product Type : Digital Room Thermostat + ECO
  • Zoning Level : One
  • Central Heating Control Type : Thermostats
  • Total Product Weight : 0.15 kg
  • Model No : DT90E
  • Product Width : 90 mm
  • Temperature Range : 5-35 °C
  • Product Depth : 29 mm
  • Pack Size : 1
  • Switch Type : SPDT
  • Compatible Boiler Type : All Boilers
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€40.95 Incl. 20% VAT

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Honeywell DT90E Digital Room Thermostat + ECO is rated 4.4 out of 5 by 34.
Rated 3 out of 5 by from Noisy Wiring of the unit very confusing. Poor and complicated instructions. After looking at many reviews I decided to purchase because it covered the old analogue hole and it said it was accurate, which it is. Within a degree. But it is very noisy as many reviews said, much noisier than expected. I live in a bungalow and it's placed a in the hall also to a bedroom. I've followed some ways round the noise with examples on line, but it's still love. Will be looking out for a replacement. Not impressed at all with the loud click at all.
Date published: 2019-10-29
Rated 5 out of 5 by from Good item Bought this item a few weeks ago to replace my old thermostat. Works great!
Date published: 2018-06-20
Rated 4 out of 5 by from Easy to install and use Easy to install as a replacement for a twisty dial analogue stat. Old stat used two cables and an earth, this just uses the two wires (L&N) so you can put the earth aside in a connector block if you want. Don't care what anyone says, the clicking of the stat turning on and off is definitely much louder than a normal stat. Would probably wake you if you had heating on using the stat in a bedroom but if it's in the hall or landing then there probably won't be an issue with that! Follow the instructions and you'll have it set up in 5 minutes!!
Date published: 2017-03-12
Rated 4 out of 5 by from Easy Install, but... Bought to replace an old rotary dial unit. Easy install, but instructions, both for installation and use, are not as clear as they might be... and diagrams showing options for how to use it are not labelled and so FAR from clear... However, anyone competent and confident enough to consider doing their own installing should not really have a problem... I've only had it a couple of days so don't feel I can reliably comment on performance or reliability yet, (so I've given 3 for both), though it seems to just work so no reason to have doubts. The one thing I'd consider a failing is that there is no backlight on the display. Where we have it located is rather in shadow, so it's a little difficult to read what the display is showing without some lighting. Regards, Cando.
Date published: 2014-09-23
Rated 5 out of 5 by from Excellent thermostat My caravan room-heater thermostat froze in the ON position. To replace it was going to be VERY expensive. I decided to fit the Honeywell DT90E instead. Brilliant move. Much cheaper and much better temperature control.
Date published: 2014-05-14
Rated 5 out of 5 by from Honeywell DT90E thermostat Purchased this to replace a mechanical one vary pleased with product keeps the temperature much more stable only negative is noisy switching but it is only a minor problem
Date published: 2014-01-17
Rated 5 out of 5 by from Great money savers! I bought on the basis of previous reviews and have NOT been let down! Installation was easy picking up the switched live and neutral from the original stat. The unit holds the temperature of the house very well. It appears to sense when the temperature is falling and cuts in ahead of the set temperature and in the reverse direction on the rise it cuts out ahead and so you get a very precise result. I have set the default Eco temperature higher than the standard value so that if we have visitors, we can press the button and override the normal value and have a warmer house for an hour or a greater time if we wish.
Date published: 2013-11-12
Rated 5 out of 5 by from Super product Great item,our electrician had it fitted in no time. Quite slim and compact do does not look unsightly in the hall,price also very competitive,easy to use. Would recommend highly
Date published: 2013-11-01
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