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Boiling Mad: Exposing Radiatorgate

 
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Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Last Post by DREI 2 months ago
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 3704
04/09/2025 8:51 am  

@rob-nezard you can see more of Drei's rad dramas here as part of his overall bodge: https://renewableheatinghub.co.uk/22000-heat-pump-disaster-that-exposes-a-broken-industry/

And I'm sure @drei will be up for it... Drei let me know if you'd like me to connect you to Rob via email.


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DREI
 DREI
(@drei)
Estimable Member Contributor
Joined: 3 months ago
Posts: 76
05/09/2025 11:45 am  

Hi @Rob,
I’d be more than happy to contribute. I have the original emails from my installer with the 2022 catalogue attached, as well as the later 2023 catalogue and the current 2025 version from Kartell’s website. Heat Geek actually recommended using UKRadiators.com instead of others precisely because of their MARC membership, which makes this all the more relevant.

I’ve also tracked down the 2021 (not 2022) and 2023 brochures online:

2021 – Kartell Catalogue, p.4 (MJ Bathrooms)2023 – Kartell Designer Radiators, p.4For reference, my radiators are K-Rail Aspen models.
Taking one of my installed models as example:
Double Column ASP60-115DW 600 x 1140

2021 output: 8,6452023 output: 6,223→ A 39% reduction.

That is a staggering discrepancy. In fairness, I can almost forgive my installers for the shortfall in design, because they used what they were given at the time. Then again, maybe they should have checked against the 2023 brochure, even so, Kartell’s shifting figures are the main root of my problem, with the poor buffer use and configuration second.
In my case there was no need of a buffer, or just a small up to 10l volumiser, because the pipe going from the heat pump to the property is about 18 meters, and they did not take that in consideration part of the Samsung’s 50l water volume requirement.

In my view, installers like mine should be pursuing a claim against Kartell, especially if I’m not the only customer facing radiator shortfalls caused by these catalogue inconsistencies.


This post was modified 2 months ago by DREI

   
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