Watt census, take 1

Now entering our third full week in the new house, I think we have most of our electricity-consuming appliances unboxed and in use. I've estimated our household power consumption; the total amount for the bill seems low (i.e. less than in the old house), but maybe I've just left off some significant extra charges in my $0.12/kWh assumption, or the omitted 5 watt control electronics in everything adds up.

The initial goal was to determine, relatively, how much our music-listening habits (which involve leaving a server and wireless router running during the day) impact our consumption. At quick glance, and without any real measurement, the answer is 10%.

The highlights:

Big computer: 100W x 16h = 48 kWh/month
Small computer: 40W x 4h = 4.8
Television: 120W x 1h = 3.6
Big stereo: 150W x 2h = 9
Small stereo: 40W x 6h = 7.4
Modem and router: 15W x 24h = 10.8

Living area lighting: 200W x 3h = 18
Kitchen lighting: 250W x 4h = 30
Security lighting: 13W x 24h = 9.3
Ceiling fans: 50W x 6h = 9
Clocks: 7W x 24h = 5
Dehumidifier: 500W x 6h = 90

Fridge: 600W x 4h = 72 = 72
Dishwasher: 1200W x 1.5h = 54
Clothes washer: 500W x 1h = 15
Clothes dryer: 300W x 1h = 9
Electric oven: 4000W x 0.5h = 60
Microwave: 1200W x 0.1h = 3.6
Coffee and toast: 2200W x 0.1h = 5

Total monthly consumption (estimated) = 460 kWh.