Type 21 Double Panel Radiators

Type 21 radiators, also known as P+ radiators, offer a high-performance middle ground between slimline single panels and heavy-duty doubles. A Type 21 unit features two steel panels with a single row of convection fins sandwiched in the middle. This design provides significantly more heat than a Type 11 but maintains a slimmer wall projection than a Type 22.

At Trade Radiators, we recommend Type 21 models for rooms that require a moderate heat boost but cannot accommodate a bulky double radiator. Explore our range below to find a high-efficiency P+ model in a variety of finishes and sizes.

Is a Type 21 Radiator Right for Your Room?

Type 21 radiators usually have a depth between 70mm and 100mm, offering a sleek look that fits well in living rooms and dining areas. If you find that your current single-panel radiator isn't keeping the room warm enough, upgrading to a P+ unit is an excellent way to increase your BTU output without having to move your furniture further away from the wall.

Leading Manufacturers: Quinn and Apollo

We stock Type 21 radiators from top brands, including Nordic Linea and Apollo Milano. For those seeking a minimalist aesthetic, the Apollo Milano flat-panel range offers a 100mm wall projection and a clean, modern silhouette. If you require a custom finish, contact our team to discuss bespoke paint options for your P+ installation.