Monobloc insert fire made from an internal casing of (4mm thick) steel and an external casing. The structure is designed to offer thermal efficiency and substantial heat recovery due to the thermal exchange which occurs between the walls of the fire and the steel air channels which surround it, allowing the circulation and reheating of the air without it coming into contact with the flames. The firebox in Aluker® has a large capacity for heat storage. The removable Aluker® plates can be easily replaced. Grate with log retainer and upper baffles in cast iron. Ash panel removable even when fire is lit. Pre-regulated flue damper. The glass door remains clean due to a secondary air wash system. Combustion is regulated by a flow of primary and secondary air. Standard with ventilation kit.