Description

The Kartell K-Rad Kompact S409K is a Type 11 single panel, single convector radiator, 400 900 mm, giving 607 W (2072 BTU/h) at T50. A single water-carrying panel with one bank of convector fins in a 56 mm case the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 10.35 kg and it holds 1.89 litres of system water.

Type 11 single panel400 900 56 mm607 W at T50EN 442 testedWhite enamel RAL 901610-year guarantee 2072 BTU/h Output at T50 607 W 10.35 kg Nett weight holds 1.89 l EN 442 Tested and certified 10 years Manufacturer guarantee

Applications & suitability

Where it goes Wall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight. Typical job A room needing roughly 607 W on a 70 C mean water temperature, or 778 W where the system runs at 80 C. Straight swap for a tired 400 900 single panel of the same size. Works with / replaces Pipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22. When not to choose this The 607 W figure is at T50. Run a heat pump at low flow temperatures and it falls hard Kartells own correction factor at T30 is 0.515, so you would get about 313 W from this radiator. Size at the T you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.

Key specifications

Installation & compatibility

Fix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.

Related & next steps

Need more output? The Type 22 at the same 400 900 mm gives 1199 W at T50, in a 105 mm case. View Type 22 A middle step? The Type 21 gives 928 W at T50 in a 70 mm case more heat for only 14 mm more depth. View Type 21 Other sizes Type 11 runs 300900 mm high and up to 3000 mm wide, from 209 W to 2849 W at T50. Browse radiators