Katherm NK


Ready-to-install natural convection floor duct convectors, manufactured from Sendzimir galvanized steel duct, painted graphite grey, with lateral height adjustment feet and raised floor feet with sound insulation. Copper/ aluminium convector with Eurokonus valve fitting, suitable for a maximum continuous operating pressure of 10 bar and 120°C, with duct reinforcing bracketry. With cover plate over the connection area. With double-T profile roll-up or linear grille, linked on corrosion-proof steel spring with matching spacers. With frame profile to match the grille. With transparent protective dust cover that also protects the edge of the frame supplied as standard. Heat output tested in accordance with BS EN 16430-1 and BS EN 16430-2.


  • Geared to the future: Works efficiently, even with low water temperatures, keeping operating costs to a permanently low level.
  • Various dimensions: Five widths, four heights and 22 lengths, as with the NK range.
  • Tailor-made: Individual made-to-fit trenches for all façades, regardless of mitred corners, curved trenches, column cut-outs etc.
  • Katherm NK has a matching frame for every grille finish.
  • Easy installation: Work on site is far easier with the Eurokonus valve connection. Other standard features, such as height adjustment feet and load-bearing raised floor brackets, reduce installation time and therefore costs.

General information


[Shape, A wide range of shapes/ sizes are possible, to cope with challenging sites. Consult manufacturer's literature for further details]


Uniclass 2015

Pr_70_60_36_90 Trench convectorsPrimary

Specification data - Trench convectors

Product Reference

Katherm NK 137

Width: 137 mm.

Katherm NK 182

Width: 182 mm.

Katherm NK 232

Width: 232 mm.

Katherm NK 300

Width: 300 mm.

Katherm NK 380

Width: 380 mm.




1000–5000 mm; insert requirements.

Unit height

92 mm

120 mm

150 mm

Not available in NK 137.

200 mm

Not available in NK 137.

Grille finish

Aluminium, black anodized

Aluminium, natural anodized

Stainless steel




Standard product features

Bar dimensions:

18 x 5 mm.

Bar spacing:

9 mm.

Free area (approximate):


Product Options


A wide range of shapes/ sizes are possible, to cope with challenging sites. Consult manufacturer's literature for further details.


Consult manufacturer's literature for further details regarding heating/ cooling outputs, sound pressure and power levels.

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