Home  5  Books  5  GBEzine  5  News  5  HelpDesk  5  Register  5  GreenBuilding.co.uk
Not signed in (Sign In)

Categories



Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

Buy individually or both books together. Delivery is free!


powered by Surfing Waves




Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to new Forum Visitors
Join the forum now and benefit from discussions with thousands of other green building fans and discounts on Green Building Press publications: Apply now.




  1.  
    Looking for recommendations please...

    Fitting a couple of electric towel radiators in a utility room to make it into a drying room. I want a thermostat/programmer to switch them on as needed, at different times/temperature from the house central heating.

    The programmable thermostat shouldn't be wireless, shouldn't talk to Alexa, shouldn't cost more than £50, and should be able to switch several amps resistive load. It should come on/off at set times or could be boosted for a few hours when there's lots of wet stuff.

    The big name central heating programmers cost too much, don't switch enough current. There are cheap unbranded units on eBay that are aimed at UFH.

    Thanks!
  2.  
    Hi
    I have used this one for several years with no problems. It has no batteries but runs of mains (but keeps time over at least a 6 hour power cut) Marketed as an UFH controller and has a built-in thermostat and comes with remote sensor. I use the remote sensor facility with extended wires to control at a distance of about 20m.The programming is for 5+2, 6+1 or 7 days and up to 6 periods a day. Rated for loads up to 16A. Currently on offer at 12 quid.

    https://www.aliexpress.com/item/32791753380.html?spm=a2g0s.9042311.0.0.5b5a4c4d1XFz4U
    • CommentAuthortony
    • CommentTimeMar 1st 2020
     
    Plug in timer
    • CommentAuthorrevor
    • CommentTimeMar 1st 2020
     
    •  
      CommentAuthordjh
    • CommentTimeMar 1st 2020 edited
     
    Plug-in timers can be a bit awkward in a bathroom.

    revor - are either of your suggestions thermostats?
  3.  
    Thanks folks but what I need is a programmable thermostat - IE the kind that you program to be 16deg at 10pm, 20deg at 8am, etc. and it monitors the temperature and modulates the heater.

    Peter, that's really helpful, Id looked at that one on eBay but was doubtful because it is very cheap. Really helpful to hear that it works!
    • CommentAuthortony
    • CommentTimeMar 1st 2020
     
    Honeywell cm907 then
  4.  
    Posted By: WillInAberdeenThanks folks but what I need is a programmable thermostat - IE the kind that you program to be 16deg at 10pm, 20deg at 8am, etc. and it monitors the temperature and modulates the heater.

    Peter, that's really helpful, Id looked at that one on eBay but was doubtful because it is very cheap. Really helpful to hear that it works!

    Yes it's cheap but works and the fact that there are no batteries to go flat is a big plus for me and I was dubious about extending the remote sensor 18M beyond the supplied wiring but that works well. (It controls tourist/rental accommodation where I don't want the punters fiddling)
    •  
      CommentAuthordjh
    • CommentTimeMar 1st 2020
     
    Posted By: Peter_in_Hungarythe fact that there are no batteries to go flat is a big plus for me

    It says the clock continues even when the power fails. How do you suppose that happens without a battery?
    •  
      CommentAuthordjh
    • CommentTimeMar 1st 2020
     
    Posted By: tonyHoneywell cm907 then

    That seems to fail the less than £50 requirement?
  5.  
    Posted By: djh
    Posted By: Peter_in_Hungarythe fact that there are no batteries to go flat is a big plus for me

    It says the clock continues even when the power fails. How do you suppose that happens without a battery?

    I presume that there is a built in battery charged from the mains. As far as I can remember in a power cut the screen goes blank and everything comes back with the power. It would take very little power just to keep the time without the display.
    • CommentAuthorLF
    • CommentTimeMar 1st 2020
     
    Siemens RDJ100 Digital Programmable Room Thermostat
    From BES. £33excl vat.
    Bought this for parents and the love it.
    Battery powered ... last years. They had a hortsman one that battery went every couple of months.
    • CommentAuthorCWatters
    • CommentTimeMar 2nd 2020
     
    I'd definitely use one with a remote sensor to allow the stat to be outside the bathroom.

    Most stats are rated for non-condensing environments only.
    •  
      CommentAuthordjh
    • CommentTimeMar 2nd 2020
     
    Posted By: LFSiemens RDJ100 Digital Programmable Room Thermostat

    It only switches 5 A, which is admittedly more than I expected. I wonder if that is enough?
  6.  
    Great link PiH.

    I often need to switch more that the usual 1 or 3 amps, so have to employ a relay. Interesting I recognise a number of the stats as being identical to branded ones normally sold for 4 times the price. I wonder if they're cheap knock-offs, or are they the same manufacturer, just selling them without the fancy label. My money is on the latter.
    • CommentAuthorrevor
    • CommentTimeMar 2nd 2020
     
    DJH not in a bathroom are they?

    yes my suggestions were timers only missed the point of needing thermostat control but the electrical towel rail I fitted in a bathroom many years ago had its own thermostat similar to how an immersion stat worked and the timer Horsman as I recall was outside on the landing.

    No need for this stat to be outside the towel rails are in the utility room?
  7.  
    Thanks everyone!

    Am using the towel radiators as heated racks for drying washing and wet coats in a utility room.

    2x400W rads, so 5A current rating should be ok, is more than many CH controls can switch.

    I want different temperature settings at different times of day so wouldn't use the basic thermostats built into the rads. In particular I want a button so we can boost/advance the heating when we load wet stuff on the racks.

    The eBay/Ali option and the Siemens RDJ100 look like great options. I didn't spot the 'boost/advance' function in their manuals but maybe others know more about them.

    Am now looking at the Honeywell ufh controller TH232 (£33 online) which has the right functions, and is in-stock near me. It can modulate the current as well as on/off switching.

    CM907 looks like super kit but is well out of budget.
  8.  
    sometimes these units don't the traditional "boost/advance" button. Instead you simply increase the set point, with an up button. It stays there till the next preset time period kicks in, then resumes the auto mode.

    Honeywell stuff has always been pretty good.
    • CommentAuthorLF
    • CommentTimeMar 3rd 2020
     
    Honeywell ufh controller looks like it is designed to switch loads. (16A) Looks a good bit of kit.
  9.  
    Posted By: WillInAberdeenThe eBay/Ali option and the Siemens RDJ100 look like great options. I didn't spot the 'boost/advance' function in their manuals but maybe others know more about them.


    Posted By: GreenPaddysometimes these units don't the traditional "boost/advance" button. Instead you simply increase the set point, with an up button. It stays there till the next preset time period kicks in, then resumes the auto mode.

    Correct !
Add your comments

    Username Password
  • Format comments as
 
   
The Ecobuilding Buzz
Site Map    |   Home    |   View Cart    |   Pressroom   |   Business   |   Links   
Logout    

© Green Building Press