Horstmann HRFS1 Programmable Room Thermostat Product Code: 93829

Electronic sensing element. Wireless. Override facility.


  • Digital Display
  • 5 On/Off Periods per Day
  • 5 / 2 Day Programmable
  • 2 Year Manufacturer's Guarantee
  • Frost Protection
  • Wireless
  • Override Facility
  • 2 Year Manufacturer's Guarantee (T&Cs Apply)


Switch/contact rating: SPDT. IP30. 8A. Temp. range: 10°-35°C. H x W x D: 116 x 100 x 23.5mm. 2 x AA batteries supplied. 60m straight line transmitter range.
Additional Information
Technical Specification
  • Brand : Horstmann
  • Product Height : 116 mm
  • Display Type : Digital Display
  • Product Type : Room Thermostat
  • Programme Facility : 5/2 Day Programmable
  • Central Heating Control Type : Thermostats
  • Total Product Weight : 0.22 kg
  • Model No : HRFS1
  • Product Width : 100 mm
  • Temperature Range : 10-35 °C
  • Product Depth : 23.5 mm
  • Pack Size : 1
  • Switch Type : SPDT
  • Manufacturer Guarantee : 2 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery service up to 3 working days: €8.95

Free delivery on all orders over €70.00

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€54.95 Incl. 23% VAT

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Horstmann HRFS1 Programmable Room Thermostat is rated 4.0 out of 5 by 103.
Rated 1 out of 5 by from DO NOT BUY THIS THERMOSTAT I’m really disappointed with Screwfix for selling this wireless thermostat, generally their stuff is good, and is always good value. I’d bought it in a rush to replace an old thermostat which had failed and which needed replacing that same day as my central heating was not working. Normally I know that whatever I buy from Screwfix will be a good product. I trusted them, but possibly won’t in the future? This is a discontinued product, and is quite a few years out of date, hence the discounted cheap price. OK, reasons I wouldn’t recommend it:- 1) It is really complicated to set up, the instructions are poor and you have a choice of FOUR different wiring diagrams to choose from, none of which are clearly explained. I consider myself reasonably astute in these matters (chartered engineer) but was not confident in wiring it. You have the problem too, in that if you wire it wrongly you can blow your boiler. Having spent five hours wiring it and it not working, I had to call in a central heating engineer who took an hour to work out, how it should be wired, not by following the instructions, but by checking which feeds from the thermostat the boiler actually required. 2) It does not have a manual mode. By this I mean that it does not have a simple on/off manual switch to allow you to turn the heating on temporarily should you be a bit cold. Instead of this, you have to adjust the normal timed set temperature each time you wish to have some temporary heat. This temporary heat will then turn off when you pass one of the timed setting boundaries. ie if your heating is set to turn off at 10pm at night and you’ve temporarily set a higher then the heat will go off at 10pm without any signal to you. 3) It has virtually no range of signal. I bought it to replace an old Honeywell 912 wireless thermostat (like for like) but whereas the Honeywell would reach any part of my house, this thermostat will only work in the same room as the receiver (ie next to the boiler), therefore it serves no purpose at all, you may as well have a manual thermostat wired next to the boiler.
Date published: 2019-04-13
Rated 5 out of 5 by from Replacement Thermostat I have had one of these installed for a number of years, and it works very well wherever I put the thermostat, but the programmable part of this combination failed. I had to buy both bits although only the programmer was faulty. I didn't even have to change the receiver as it worked with the new sender. I now have a spare receiver.
Date published: 2019-04-13
Rated 1 out of 5 by from Horstmann Wasted 3 hours of time , collecting, fitting, discovering faulty and returning/replacing
Date published: 2019-04-08
Rated 1 out of 5 by from Absolute rubbish Have had this a little over a year. It no longer turns our brand new boiler on when it is supposed to, and also does not turn it off, despite having a plumber set it up and it working initially. Seems like it has been discontinued by Horstmann but still being sold by Screwfix...? Don't waste your money.
Date published: 2018-12-26
Rated 5 out of 5 by from Easy to fit would recommended this as easy to fit and just as easy to set up and use, very happy with it.
Date published: 2018-12-02
Rated 2 out of 5 by from Very unreliable I fitted this in a 1 bedroom flat to replace a Flomaster. It worked 70% of the time which is just not good enough especially as it was only 6 meters from the receiver. I tried changing the channel and moving it around but no improvement. Thinking it was a defective unit I replaced it with another but no improvement. I then tried it in another house. It was equally unreliable. There were two solid brick walls to cope with but the Flomaster had worked fine. I ended up using a Honeywell unit at a much higher cost but it works every time in any location. Seems it's worth paying the extra.
Date published: 2018-11-18
Rated 5 out of 5 by from Very good This is our second one for different property. The first one is still working even though is nearly 10 years old. Recommended 100%.
Date published: 2018-11-08
Rated 5 out of 5 by from great stat east to install and set up and a great bargain for the price
Date published: 2018-10-07
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