I WRITE in response to the letter stating that the water usage increases, simply due to having a combination boiler fitted.

It is quite possible that in the letter writer’s son’s case this is so, but in my case it greatly reduced my water usage and also my cost, as these boilers are far more economical than the old hot water storage cylinder and separate boiler.

The obvious reason for the difference with the two cases is the siting of the boiler and the siting of the hot water cylinder and consequent distance the water has to travel to the taps or shower.

C WELCH. Bitterne Park Southampton .