Radiator 21K 400 x 2400 output 2290W

Product detailed description

Steel radiator with side connection for central heating in family houses.

• Connections: 4 x 1/2“
• Test pressure: 1,3 MPa
• Operating pressure: 1,0 MPa
• Heating medium temperature: hot water up to 110 C
• Product: Stelrad Compact Softline
• Type: 11/20/21/22/33
• Overall height: 300 – 900 mm
• Overall length: 400 – 3000 mm
• Overall depth: 61/77/100/158 mm

Low-temperature heating body Compact Softline is made of fine cold-rolled steel sheet to EN442-1 quality, with side panels and a top grille, forming a compact unit with a vertical water channel spacing of 33.3 mm. The convector plate is welded to the internal channels. Before painting, all radiators undergo a multi-stage cleaning process, including iron phosphating and a demineralised rinse. A primer coat is then applied, followed by a powder coat finish in Stelrad 9016 white. Each radiator is packed in cardboard with robust corner protectors and protective film. All units come with mounting brackets on the rear side. Quality assurance is certified to EN ISO 9001. Thermal output is verified to EN 442. Design complies with BAGUV safety guidelines.

Frequently asked questions

• What output does this specific radiator (400 x 2400 mm, type 21K) have? This size and type has a declared thermal output of 2290 W (according to EN 442, at the standard temperature difference) - when choosing the correct radiator size, base your choice on the calculated heat loss of the room in question.
• What does the type designation 21K mean? The number before "K" (e.g. 11, 20, 21, 22, 33) indicates the radiator's construction type - the number of radiator panels/plates and convector fins it contains; a higher number means more layers and therefore higher output at the same external dimensions. A radiator without the letter "V" in its type has a side connection - the classic placement of connections on the sides of the radiator, suitable for standard side pipe routing.
• What is the maximum operating pressure and temperature? The radiator is designed for an operating pressure of up to 1.0 MPa and a heating water temperature of up to 110°C, with a test pressure of 1.3 MPa - typical domestic heating systems operate well below these values.
• What is the warranty on the radiator? The manufacturer provides a 10-year warranty on tightness and thermal output from the date of manufacture, provided professional installation, correct maintenance and operation are observed - the warranty does not cover mechanical damage caused during transport, handling or improper installation.
• Must installation be carried out by a professional? Yes, connecting the radiator to the heating system (single-pipe or two-pipe, with forced circulation) should be carried out by a heating engineer/installer, who will also ensure correct venting and balancing of the circuit.