Some examples of such products include:
Biomass Boilers

These are highly efficient and also kind to the environment, they use wood pellets, or wood logs and other sustainable fuels for your home central heating system. Find out more about Biomass Boilers
Air Source Heat Pumps

Air to air heat recovery units like these are better at energy saving than conventional air conditioning systems. Find out how a heat pump works and how to use them effectively Air Source Heat Pumps