Rytons is proud to be a family-run business and a British manufacturer, fulfilling the needs of the construction industry since 1972. Products and services include: An extensive range of A1 Fire-rated Ducting Kits for compliant extract ventilation in multi-storey developments requiring non-combustible materials. Controllable background ventilators for habitable rooms. Super Acoustic AirCore sets for ventilation with the benefit of sound proofing. Periscope Underfloor Ventilator. Ultra-clear Rytweep cavity weep hole duct. Slim Vent cavity weep vents. Boiler, stove and fire ventilators. Free online sub-floor ventilation calculator. Free online background ventilation calculator. Free acoustic evaluation service.