Spain has recently announced a significant move towards the use of domestic solar water heaters in a bid to improve self-sufficiency and lower rising household bills. The goal is eventually to emulate Israel’s domestic water heating situation where 90% of homes are equipped with such heating systems, meaning that hot water supply has near zero financial and environmental cost. But such countries obviously have quite an advantage over the UK in the solar energy stakes, and alternative solutions must be sought if the UK is to achieve something similar.

It is not that solar heaters are unavailable in the UK - they are - and can provide a significant portion of a household’s water heating energy needs, especially in areas of Southern England. But whichever way you look at it the numbers just can’t match those of Israel and Spain in terms of broadness and scope of viability. Solar water heating has a part to play, but so too must alternative solutions…

The two aspects of approaching the problem involve reducing the amount of water required from a mains supply, and secondly reducing the amount of energy (again from the mains supply) that is required to heat this water.

In order to tackle the initial issue there is a highly viable solution available for UK homes; rainwater harvesting. Such water can be collected either from a large surface such as a building’s roof or from a large ground area, and can be used for flushing toilets, watering gardens or even supplying the washing machine.

With average daily water use in the UK currently at 150 litres per person, rainwater harvesting has a significant part to play in reducing our dependence on mains supplies (not to mention household bills, especially considering the imminent water price increases scheduled for 2010).

The second issue, of water heating, has multiple solutions and should be assessed on an individual basis depending on particulars of location and weather of your area, but the main options involve the aforementioned solar panel systems, to biomass boilers as well as ground and air source heat pumps (more information on these technologies can be found on the ‘case study’ section of this page).

The bottom line is that such technologies will not be suited to installation in all UK homes, but also that at the same time there are many that would benefit financially (in terms of reduced household bills) by adopting such tools, especially in the current climate of rising household bills. Perhaps it is time such moves were no longer considered a shopping or home improvement choice, but rather incorporated into a government housing intiative to inform those who could benefit about what is available and how such changes can be implemented.

The collective environmental benefits would encompass helping meet housing goals of reducing the average UK household’s carbon footprint, with obvious environmental benefits for all, as well as being a more short term crisis solution with regard to the current cash squeeze and climate of rising costs.

Dejan Levi