The Grant Vortex Condensing Combi’s are extremely compact in size and have a number of features not usually found on oil-combination boilers.

Both of the new models incorporate unique 35 plate-heat exchangers, which due to their low water content and larger surface area, increase the domestic hot water performance by up to 60% over existing boilers COMBI CONDENSING RANGE
Grant Vortex Combi Range

ENERGY SAVING OIL FIRED CONDENSING BOILERS FOR A NEW OR EXISTING INSTALLATIONS

The Worcester Heatslave concept has essentially been around for almost 40 years and now in its condensing format, is the most efficient method of heating your home.

It is a further benefit of Worcester Bosch innovation and design that new Greenstar Heatslave and Greenstar Danesmoor 18/25 boilers have identical ‘footprints’ (dimensions) to the older boilers they have superseded.
So replacing an existing Worcester Bosch Heatslave or Danesmoor oil boiler with the equivalent condensing model could hardly be more convenient.

ENERGY SAVING OIL FIRED CONDENSING BOILERS FOR A NEW OR EXISTING INSTALLATIONS