Van Marcke by Henrad. Alto. Vertical panel radiators made of cold-rolled quality sheet steel, manufactured and tested in accordance with the EN 442 standard, fitted with side panels. The radiators are fitted with 6 connections of 1/2" internal thread. Painting process: pretreatment followed by a high-quality and environmentally friendly painting process. Colour: RAL 9016 (white). The radiators are not fitted with hanging strips. Types 21 and 22 are reversible. The reversibility of the radiator implies the reversal of flow and return. Operating pressure: max. 10 bar. Test pressure: 13 bar. Maximum operating temperature: 110°C. The heat outputs are expressed in Watts according to EN442. at regime 75/65-20°C (dT 50). The radiator packaging includes the fixing materials (the necessary wall brackets, screws and plugs), a bleed valve and blanking plugs.