Forums

Forums
Renewable Heating
Thermostats, Volumi...
Stelrad radiators
 
Notifications
Clear all

Stelrad radiators

 
Page 1 / 2
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Last Post by Mars 4 years ago
24 Posts
7 Users
30 Reactions
6,484 Views
RSS
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 23/03/2021 5:26 pm  

We’re super excited. Our Stelrad K3 compact replacement radiators arrived yesterday to replace our old single core and K2 rads in the rooms that were not coming to temperature this winter (TV room, downstairs guest, office and garden room). The service and delivery times from Stelrad was excellent, and we've booked the installation work for April 13. We're having quite a bit of work done, so hopefully the cold portion of the house will now heat better, and hopefully this coming winter we're going to be a lot cosier.


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
Quote
Topic Tags
Stelrad radiators k3
 Bob@Lochinver
(@boblochinver)
Reputable Member Member
Joined: 5 years ago
Posts: 109
23/03/2021 10:06 pm  

I saw you mentioned the Stelrad radiators previously and did some research into them and is definitely the ones I’m going to use to replace the old radiators in my house. I looked at k2 ill need to check out the k3 (what is the difference) I have also looked at using a small fan at the bottom of the radiators which allows the room to heat up quicker and potentially reduce heating costs 

 



   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 23/03/2021 10:36 pm  

From what I've been able to establish, the K3s chuck out a lot more heat than the K2, and they are (apparently) designed for low flow temperatures, so should be idea for ASHP systems.

As for the fans, @crashoverride, told me about Speed Comfort a while ago: https://speedcomfort.co.uk  

They certainly look great, but they are very expensive (possibly prohibitively so), given that they're just a series of CPU fans. So what @crashoverrride did was make his own. I'll ask him whether he's interested in writing an article on how he did it.  


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote



 Kev M
(@kev-m)
Famed Member Member
Joined: 5 years ago
Posts: 1276
24/03/2021 9:10 am  

K2 and K3 are essentially the same, but with 2 and 3 panels/sets of fins.  A Stelrad K2 1000x600 gives 1732W, a K3 2389W.  These at 'standard' temps but OK for comparison. So 35-40% more output for a given size.  

 

My quote assumed K2s but I'm going to ask for a combination.  The K3s are near twice the price so I will have to be selective. 



   
👍
2
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 24/03/2021 12:30 pm  

@kev-m, fully agree. Most of our K2s have been more than adequate, but we're going to upgrade to K3s in rooms that we know haven't been able to come to temperature and they need more heat output. The K3s weigh an absolute tonne. The 700x1000mm weighs over 60kgs.


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4427
24/03/2021 1:33 pm  

Hi Mars,

I was surprised to read that you are replacing your radiators. If my memory serves me well, when we discussed your problems some time ago, you were measuring a temp of 23C on the radiator, which would indicate to me that the warm water is not getting to the radiator in the first place.

If the radiator is heating up but cannot get the room up to temp, then that would indicate that the radiator is too small.

Even if you are getting the radiators supplied and installed for free, it would still not solve your problem if the water is not flowing through the radiators. Have you checked for stuck valves or blockages?

 



   
👍
2
ReplyQuote
 Bob@Lochinver
(@boblochinver)
Reputable Member Member
Joined: 5 years ago
Posts: 109
24/03/2021 4:51 pm  
Posted by: @editor

They certainly look great, but they are very expensive (possibly prohibitively so), given that they're just a series of CPU fans. So what @crashoverrride did was make his own. I'll ask him whether he's interested in writing an article on how he did it.  

hmm interesting and as I used to have my own IT company I have about a zillion (maybe a gazillion) CPU fans so maybe I can rig something up myself, its the temp controller and its ability to switch them on off that is that little extra bit of zing that you need to balance the heat 

 



   
👍
2
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 25/03/2021 9:09 am  

@derek-m, you are spot on. The radiators is just one of the changes as they are undersized for the rooms they’re in.

As part of a lengthy investigation with a lot of testing and analysis by the manufacturers, it was determined the flow to the north end of the house is not good enough, so a bigger pump will be fitted to deliver more pressure to engineer out a potential reduction in pipe bore. 

Water delivery to rads in the south end of the house was 45C, but just 39/40C at the north end.


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 25/03/2021 9:12 am  

@boblochinver, that’s exactly right. It’s the temperature control to turn the fans on and off that’s essential so that they don’t burn out. I suppose some soundproof casing would also help to reduce the high pitched noise CPU fans used to make. Don’t know if they still do.


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote



Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 11/05/2021 3:14 pm  

We've been in touch with Stelrad and they have provided us with this promo code that you can use on the Stelrad website to get a 10% discount on their Vita & Softline Compact K3 radiators: MyHomeFarm10% – offer ends on August 10, 2021.


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
👍
4
ReplyQuote
 MikeFitz
(@mikefitz)
Trusted Member Member
Joined: 4 years ago
Posts: 29
14/05/2021 11:09 pm  

Ohhh thanks



   
👍
2
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3555
Topic starter 15/05/2021 9:28 am  

@mikefitz, welcome to the forums. You looking to get some new rads?


Buy a copy of the The Ultimate Guide to Heat Pumps

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote
Page 1 / 2
Forum Jump:
  Previous Topic
Next Topic  
Related Topics
Topic Tags:  Stelrad (1) , radiators (7) , k3 (1) ,



Share:

Join Us!

Podcast Picks

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →