Radiator 21VK 500 x 700 output 807W

Product detailed description

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

• Connections: Novello 6 x 1/2“
• Test pressure: 1.3 MPa
• Operating pressure: 1.0 MPa
• Heating medium temperature: hot water up to 110 °C
• Product: Stelrad Softline Compact VK
• Type: 11/20/21/22/33
• Overall height: 300 – 900 mm
• Overall length: 400 – 3000 mm
• Overall depth: 61/77/100/158 mm
• Position of bottom Novello outlets: right/left / on request

The low-temperature Compact Softline heating body is made from fine cold-rolled sheet steel 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 fin is welded onto the internal channels. Before painting, all radiators go through a multi-stage cleaning process, including iron-phosphate phosphating and a demineralised rinse. A primer coat is then applied, followed by a powder coat finish in Stelrad white 9016. Each radiator is packed in cardboard with sturdy corner protectors and protective film. All bodies have mounting brackets on the back. Quality is verified to EN ISO 9001. Thermal output is verified to EN 442. The design complies with the BAGUV safety guidelines.

Frequently Asked Questions

• What is the output of this specific radiator (500 x 700 mm, type 21VK)? This size and type version has a declared thermal output of 807 W (according to EN 442, at standard temperature difference) - when choosing the correct radiator size, base your choice on the calculated heat loss of the given room.
• What does the type designation 21VK mean? The number before "K" (e.g. 11, 20, 21, 22, 33) indicates the radiator's structural type - the number of radiator panels/plates and convector fins in its construction; a higher number means more layers and therefore higher output at the same external dimensions. The letter "V" in the type designation means bottom connection (valve-compact) - the connections are located on the bottom edge of the radiator, which is especially suitable for underfloor pipe routing without visible risers.
• 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 proper venting and balancing of the circuit.