Stelrad Double Panel Single Convector (P+) 300mm High Radiator

Made by Stelrad, from their Compact steel panel radiator range.

This Double Panel Single Convector radiator stands only 300mm high, sold in 1500mm and 2000mm lengths. It is a Type 21, also called P+: two panels with a single set of convector fins sandwiched between them.

A 300mm height is for awkward spots: under a low window, below a breakfast bar, or along a wall with a dado rail. Because it is short, it comes in long lengths to give useful heat. Its slimmer build than a Type 22 also helps where depth off the wall matters.

• Height: 300mm
• Lengths: 1500mm or 2000mm
• Type 21 (P+): two panels, one convector
• Brackets, side panels, grille, vent and plugs come with it

Fitting a double panel single convector radiator this low

At 300mm high the valves sit low, so make sure a spanner fits round them. A long radiator needs its brackets dead level, or water and air will gather at one end. Fit valves, fill the system and bleed from the top corner. Then check every joint once it is hot. Other heights, plus valves to suit, are in our radiators and accessories category.

Picking up a 300mm radiator in Glasgow

300mm P+ radiators are sold at Plumb Parts, 555 South Street, Glasgow G14 0QX. It opens Mon-Fri 8am-5pm and Sat-Sun 8am-1pm. Ordering online is the other option.

Specification

• Range: Type 21 (P+) double panel, single convector
• Sizes: 300mm high; lengths 1500mm and 2000mm
• Suitable for: Wet central heating systems
• Pack quantity: One radiator, with wall brackets, top grille, side panels, plugs and air vent

Common Questions

Why only 1500mm and 2000mm at 300mm high?

Those are the two lengths we list in this low height. A short, low Type 21 would give very little heat.

What does P+ mean?

It is the trade name many use for a Type 21. Two steel faces, with a single row of fins sandwiched in the middle.

Is a Type 21 slimmer than a Type 22?

Yes, with one convector instead of two it sits closer to the wall.