Energy Efficient Replacement Combi Gas and Oil Boilers
Harpenden, St.Albans, Hemel Hempstead, Welwyn Garden City, Watford and Tring

The major difference between a combi and any other type of boiler is that a combi eliminates the need to store hot water - so there is no hot water cylinder in the airing cupboard.

It is both a high-efficiency water heater and central heating boiler, combined (hence the name) within one compact unit which usually sits in the kitchen or utility room, or sometimes in the airing cupboard. The space savings result from the fact there is no hot water storage cylinder, cold water storage cistern in the loft or other familiar components of a conventional heating system.