Radiator 21K 600 x 700 output 942W

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
• Built height: 300 – 900 mm
• Built length: 400 – 3000 mm
• Built depth: 61/77/100/158 mm

The Compact Softline low-temperature radiator is made of fine cold-rolled steel sheet according to EN442-1 quality, with side panels and a top grille as 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 go through a multi-stage cleaning process, including phosphating with iron phosphate and a demineralizing rinse. A primer coat is then applied, followed by a powder coat in white Stelrad 9016. Each radiator is packed in a carton with robust corner protectors and protective film. All units have brackets on the back. Quality is verified according to EN ISO 9001. Thermal output is verified according to EN 442. The design complies with BAGUV safety guidelines.

Frequently Asked Questions

• What output does this specific radiator have (600 x 700 mm, type 21K)? This size and type version has a declared thermal output of 942 W (according to EN 442, at standard temperature gradient) - when choosing the correct radiator size, base your decision on the calculated heat loss of the given room.
• 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 sheets in its composition; a higher number means more layers and therefore higher output at the same external dimensions. A radiator without the letter "V" in the 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/plumber, who will also ensure correct air venting and balancing of the circuit.