Glow-worm Ultracom 30 cxi combi boiler with digital programmer included. 22.9kW Central Heating 12.3 litres/min DHW H 715mm x W 450mm x D 334mm 2 year parts and 1 year labour warranty This boiler is a direct update for the Glowworm CXi, which has ceased production. This boiler has the added benefit of an in-built timer.