There's no charge for the tado° smart thermostat equipment (£199) or installation (£50) saving you a total of £249 you'll need internet access and a smartphone running ios 7.1, android 4.0.3 or windows phone 10 or above to control your heating from your smartphone. Copyright 2016 | geo direct supply, inc | site design by. Compare prices and quality of combi boilers. Mon-thur: 8am - 4:30pm | fri 8am-1pm. Get in touch.