Stelrad radiators
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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
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
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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
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.
@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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
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?
Posted by: @editorThey 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
@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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
@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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
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 Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
@mikefitz, welcome to the forums. You looking to get some new rads?
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
-
Boiling Mad: Exposing Radiatorgate
10 months ago
-
Eskimo Column Radiator – Fronze Finish
10 months ago
-
Convector options for a small kitchen
2 years ago
-
Low temperature radiators
4 years ago
- 21 Forums
- 1,751 Topics
- 37.5 K Posts
- 35 Online
- 2,040 Members
Join Us!
Latest Posts
-
RE: Samsung E911 intermittent issue
Will do and thanks for all the help!!
By NetDonkey , 4 hours ago
-
RE: Watch Where Your Installer Fits Motorised Valves
The irony of this entire situation isn’t lost on me @tr...
By Mars , 5 hours ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
We've had our Homely for a couple of months now. Comple...
By benson , 6 hours ago
-
If all we cared about was cost per kwh of heat, we can ...
By Ringi , 7 hours ago
-
RE: Post Buffer Tank DUCA Circulating Pump Settings
@editor Hi, yes it does, thank you
By Potatoman , 7 hours ago
-
RE: Questions and comments about annual heat pump maintenance and servicing
@toodles mine went and it was cheaper to get another, i...
By David999 , 9 hours ago
-
RE: Agile: average import cost vs other tariffs?
I don't know if you've taken a look at all, @ianmk13, b...
By Majordennisbloodnok , 10 hours ago
-
RE: What is a considered a decent weather curve for running weather compensation?
So with a flow temp maxing at 42C, managed to get livin...
By Crimson , 11 hours ago
-
RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
@editor I purchased both books from Amazon and read th...
By ASHP-BOBBA , 14 hours ago
-
RE: New Samsung 12KW Heat Pump Help
@mike-h Oh, I am not sure I can answer accurately, When...
By ASHP-BOBBA , 1 day ago
-
RE: Who's your electricity provider and what's your tariff?
Received an email today from British Gas informing me t...
By Mike Patrick , 1 day ago
-
RE: Mitsubishi Ecodan ASHP general set-up and efficiency
Maybe work out what brand they are and google the instr...
By Gary , 2 days ago
-
RE: The UK’s Heating Nightmare: Why Many Systems Fail Homeowners
"within a few years" is a pretty long timeframe within ...
By Transparent , 3 days ago
-
RE: The good, the bad and the not that great – my heat pump installation
@dunlorn Good shout that buddy will give it a go at ...
By Burtis , 3 days ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
@bromide Thanks for the advice, doing it once but prope...
By ChandyKris , 4 days ago
-
RE: Grant 13kW Aerona3 - issues getting zones to temp
I've created a separate thread to discuss WC settings a...
By Crimson , 4 days ago
-
RE: Heat Pump SCOPs – The Truth Might Not Be What You Think
Thanks I will try that and look at results
By A E Deans , 4 days ago
-
RE: Excessive performance/system issues with GSHP
@johnr Thanks - the Buffer tank is in the integral gara...
By didjerama_uk , 4 days ago
-
RE: Do thick walls make for warm houses?
@robl Thanks, thats interesting 🙂
By bontwoody , 5 days ago
-
RE: Mitsubishi EcoDan ASHP Settings not saving.
@fez96 Who’d of thought.? 👍
By Westkent , 5 days ago
Latest Topics
-
Samsung E911 intermittent issue
By NetDonkey 3 days ago
-
Samsung HP secondary pump wiring
By Chris-in-Kemnay 7 days ago
-
Post Buffer Tank DUCA Circulating Pump Settings
By Potatoman 1 week ago
-
Baffled by heat pump size/ choice!
By zuluwarrior 1 week ago
-
Vaillant ASHP Weather Compensation with Octopus Cosy
By tom58l 2 weeks ago
-
By R0y124 2 weeks ago
-
Mitsubishi Ecodan 11kw Defrosting Issue.
By ThunderMink 2 weeks ago