What's the difference between a type 21 and 22 radiator?

Can someone please tell me what the difference is between type 21 and type 22 radiators? Thanks.

Asked by Sarath on 15th Jun 2023
Expert Trade Answers
"Type 21 is double panel single convectors ( single layer of fins in centre of radiator) and type 22 is double panel double convectors ( 2 layers of fins )"
Answered on 15th Jun 2023 - Member since May 2023 - report
"Type 11 - single panel single convector
Type21 - Double panel single convector
Type 22 - Double panel double convector
Peter Clarke - Gas safe engineer
Answered on 16th Jun 2023 - Member since Apr 2023 - report
"21 - double panel, double fin
22 - double panel, double fin

22 will give off more heat, but will stick out further than 21!"
Answered on 26th Aug 2023 - Member since Aug 2023 - report
"A Type-21 radiator is a double panel single convector ( the fins at the back of the radiator) and a type-22 radiator is double panel double convector, meaning a type-22 radiator will give off more heat than a type-21 radiator.
A type-11 radiator is a single panel, single convector radiator."
Answered on 15th Jun 2023 - Member since Mar 2023 - report
"The difference between T 22 and T 21 convector radiators is that in T 22 radiators, there are two sets of convector fins inside the radiator. These push out more heat and are thicker than your average T 21 radiator."
Answered on 23rd Jul 2023 - Member since Mar 2022 - report
"Type 11 single panel single Convector
Type 21 double panel single Convector
Type 22 double panel double Convector

Answered on 3rd Aug 2023 - Member since Jul 2023 - report
"Hi Sarah, In answer to your question.
Type twenty one radiators are double panel with a single convertor while type twenty two are double panel with two convectors.
You could think of convectors as 'fins' between the panels that help to increase heat output of the radiator.
The advantage of type twenty one is that they fit snugly to the wall whereas, type twenty two are a little bulkier.
Also, you can increase the physical size of a type twenty one to match the relative output of a type twenty two.
Hope this helps. Kind Regards, Chris"
Answered on 15th Jun 2023 - Member since Apr 2023 - report
"Type 21 is double panel with single convertor.
Type 22 is is double panel with twin convertor"
Answered on 15th Jun 2023 - Member since Jan 2023 - report
"21 is single panel radiator
22 is double panel radiator"
Answered on 24th Jul 2023 - Member since May 2023 - report
"Type 21 is an single radiator and a type 22 is a double panel."
Answered on 21st Aug 2023 - Member since Aug 2023 - report
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