1. Tracked Changes. Gas-fired central heating boilers. Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW Part 2-1, (29th September 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (270 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗