Gas flame from a hob with the word Off with an overlay of smaller flames. In a time of increasing energy prices the small measure of turning a gas boiler off when not using it can make an important difference in reducing household bills. It is important to note that some boilers are programmed to give hot water even when turned off. This simple realisation and a change in the settings lead to a reduction for the photographer to 10% of his previous average daily gas usage. Not a 10% reduction, but 1/10th of the usage.