Just some quick thoughts on how to reduce electricity consumption at home. These figures are very rough-and-ready (but do come from 9 day’s of monitoring with IAMs… but usage was a little unusual over the Christmas period):
- 10 x 12V 50W halogen kitchen down-lights on TRIAC dimmer (currently 1kWh/day = £50/yr). These are the biggest single power draw in our house. I’m currently researching LED or CFL alternatives.
- Central heating and hot water pumps (combined currently 0.6 kWh/day = £27 / year). Replace with energy efficient pumps (these cost about £100 IRC, so payback for 2 pumps would be ~9 years).
- washing machine (currently 0.5 kWh/day = £22/yr) fit hot water feed with mixer. Heating water with a local gas boiler is more carbon efficient than using resistive heating.
- dishwasher (currently 0.6kWh/day = £27 / year) fit hot water feed and disable hot air dryer somehow?
- 34” CRT TV (currently 0.5 kWh/day = £22 / year) upgrade to LED LCD TV (32” LCD TVs use about 40W) (notes)
- Dual-core Athlon HTPC circa 2006 (currently 0.6kWh/day = £27/year). Upgrade to 22nm Atom when it’s available.
Raw consumption data from 9 days of usage after the break…
Ignore the “count”, “SAMPLE PERIOD” and “% missed” columns - these are just there to help me keep an eye on my data logging system.
Start 2012-12-25 17:53:14 End 2013-01-04 08:00:06 Duration 9 days, 14:06:52 ———- ———————
|POWER (W)||SAMPLE PERIOD (s)|
The HTPC and TV usually use less than listed above but I recently had to fix our HTPC which required that it be on constantly for about 48 hours.