Flatty Radiators

Flatty is our steel column panel radiator range for homeowners who want a clean, modern look at an everyday price. There are five models: a low 600 mm horizontal that sits under a window, and a tall vertical for slim walls, in white, anthracite or matt black. Every size comes as a single or double panel, from £72.15 inc. VAT.

Horizontal or Vertical Flatty?

The 600 mm horizontal in white or anthracite runs from 420 mm to 1,470 mm wide (280 – 1,583 W at ΔT50), so one radiator can span a full window sill. The vertical comes in 1,600 and 1,800 mm heights and five widths from 350 to 630 mm (661 – 1,833 W), putting more output on a narrow wall, beside a door or in a hallway. To compare other styles, see our vertical designer radiators or, for low wall runs, our horizontal designer radiators.

Single or Double Panel?

A single panel projects 79 mm from the wall; a double panel projects 94 mm and gives roughly 55% more heat from the same footprint. In a hallway or kitchen where every millimetre matters, single is usually enough. For a living room or an older, draughtier house, a double panel often lets you use a smaller radiator.

Flatty Specs at a Glance

Flatty Heat Output Tables

Outputs are tested to BS EN 442 at ΔT50 (flow 75°C, return 65°C, room 20°C). ΔT60 suits older high-temperature boilers; ΔT30 is the figure to use with heat pumps and low-temperature systems — both are calculated from the ΔT50 test result. Prices include VAT.

Flatty Horizontal 600 mm — White and Anthracite

Outputs are identical in white and anthracite.

Flatty Vertical 1,600 and 1,800 mm — White, Anthracite and Matt Black

Outputs are identical in all three finishes. The 1,600 mm height is available in white and anthracite only.

Choosing the Right Size

A rough guide for rooms with 2.4 m ceilings and double glazing. Add 15–20% for north-facing rooms, solid external walls, large windows or conservatories. Size by BTU rather than by dimensions — you can meet the total with one larger radiator or two smaller ones. Try our free BTU calculator or call us on 02477 220 780.

All radiators are supplied with wall brackets and fixings, a blanking plug and a bleed valve. Radiator valves are not included — browse our matching radiator valves and add a thermostatic (TRV) set for room-by-room control. Order before 12pm for next working day delivery on UK mainland, with free delivery over £200, a 5-year guarantee and 30-day returns.

Frequently Asked Questions

What is the difference between single and double panel Flatty radiators?

A double panel gives roughly 55% more heat than a single panel of the same size and sits slightly further from the wall (94 mm against 79 mm). Choose single where space is tight and the room is small; choose double when you need more output from the same wall space.

Are Flatty radiators suitable for heat pumps?

Yes. ΔT30 outputs are published for every size, so you can size a Flatty against a low-temperature system. Because a heat pump runs at lower flow temperatures, you will usually need a larger radiator than for a gas boiler — use the Watts ΔT30 column in the tables above.

Do Flatty radiators come with valves?

No. Wall brackets, fixings, a blanking plug and a bleed valve are included. Connections are ½" BSP at the bottom, so pair the radiator with 15 mm angled or straight valves to suit your pipework. A thermostatic (TRV) set is recommended.

Which Flatty finishes are available?

White (RAL 9016) and Anthracite (RAL 7016) are available in both horizontal 600 mm and vertical formats. Matt Black (RAL 9005) is available in the 1,800 mm vertical.

Are Flatty radiators BS EN 442 certified?

Yes. They are low-carbon steel, rated for 10 bar working pressure and 13 bar test pressure, and tested to BS EN 442.

What warranty do Flatty radiators have?

Every Flatty radiator carries a 5-year manufacturer's guarantee. We have been supplying radiators from Coventry since 2012 and can help with sizing on 02477 220 780.