Type 22 double panel radiators

 Both Type 21 and Type 22 radiators are common types of central heating radiators used in residential and commercial buildings. The main difference between the two is their depth & projection and the number of fins they have.

Type 21 radiators (AKA double-panel single convector radiators) consist of two panels with a single set of fins located in between them. These radiators are thinner and more compact than Type 22 radiators, making them a popular choice for smaller rooms or spaces with limited space.

Type 22 radiators consist of two panels and two sets of fins, which increases their heat output compared to Type 21 radiators. Type 22 radiators are also thicker/deeper than Type 21 radiators, making them more suitable for larger rooms or spaces where higher heat output is required.    

Overall, the choice between Type 21 and Type 22 radiators will depend on the specific heating requirements of the room or space in question, as well as the available wall space for installation.

Type 22 radiators are generally more efficient than conventional radiators, as they have a larger surface area and more fins, which allows them to radiate more heat into the surrounding room. This makes them a popular choice for larger rooms or spaces where higher heat output is required.

However, it's important to note that the efficiency of a radiator will depend on a number of factors, including the size of the room, the insulation of the building, and the overall efficiency of the central heating system.

While it is possible to install a Type 22 radiator yourself, it's recommended to have it installed by a qualified heating engineer to ensure proper installation and safety. The engineer will also be able to advise you on the most suitable location for the radiator and any necessary changes to the central heating system.