Solar water systems

 
Your water heater can account for a large part of your household energy consumption and the related emission of the greenhouse gas carbon dioxide (CO2). Modern solar and heat-pump water heaters use mainly the sun and air to provide you with hot water, producing much less CO2.

In most locations, the systems can produce up to several tonnes less CO2 per year than conventional electric water heaters. However, compared to conventional gas systems, only the best solar performers can save substantial amounts of CO2.

Most models can also save you money in the long run. However, depending on the model and where you live, you may not be able to get a fast payback time for installing one of these systems. This is because they're considerably more expensive to buy than conventional systems.

However, the available can make payback times very reasonable.