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Central Heating Radiator Types [type 11, type 21, type 22]

Radiators are available in three main types, detailed as follows:

Type 11 Single panel, single convector. The first digit indicates 1 panel, second digit 1 convector [ridged metal fins on back of radiator]

Type 11 Radiator

Type 11 Radiator

Type 21 Double panel, single convector. The first digit indicates 2 panels, second digit 1 convector [ridged metal fins in middle of radiator, between panels]

Type 21 Radiator

Type 21 Radiator

Type 22 Double panel, double convector. The first digit indicates 2 panels, second digit 2 convectors [ridged metal fins in middle of radiator, between panels]

Type 22 Radiator

Type 22 Radiator

Always check the manufacturers heat output data for each radiator you want to install.

It is also important to compare different radiator styles for heat output. A heated towel rail, as shown below, may look quite big – but often not too good for heating a bathroom.

Chrome Heated Towel Rail Radiator

Chrome Heated Towel Rail Radiator

Sadly heated towel rails are not sufficient to heat a bathroom. It is always worth going for a larger size towel rail, if you intend it to also heat the bathroom. Manufacturers data will confirm the design heat output. Add 25% capacity required if you are hanging towels on it. As radiators can not warm towels and heat rooms very efficiently at the same time.

Please leave a reply or email me at aim.home@gmx.com if you want any help with this post.

I have put a post together giving details of how to choose the right size of radiator for heating a room. The link https://aimhome.wordpress.com/2012/12/30/central-heating-radiator-sizing/

will take you there.

AIM – improving your world without costing the earth

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