We use gas for heating our hot water and the central heating – and since approximately Christmas we have been using a combination of new electronic thermostats/actuators and a number of homebuilt (jeenode based) sensor to control our heating.
So I am happy to see that for the period from Xmas to end june last year, compared to the same period this year we were using
18 December 2009 – 22 june 2010 – A average of 7.48 units per day
11 December 2010 – 29 june 2011 – A average of 5.30 units per day
So we have definitely managed to reduce our gas usage quite a lot.
But this is just step 1 – and we have more plans for further reducing our gas usage over the next 6 months.