Ecowand is a temperature control system that measures room temperature and humidity into a computer which then uses this information to help reduce energy consumption when heating and cooling homes and offices. Both the computer user and the site energy manager can see what is happening and what has happened over time. The application is global. The system has been internationalised and is easily customised for OEM customers or as a publicity give-away. The eco-wand system will save money, energy and CO2 and make the licensee considerable profit.