Home energy usage
I am attempting to estimate total home energy use for a coderequired calculation and it is more challenging than I expected. The Heat loss calc part combined with HDD seems pretty straightforward. The DOE estimates that the average household uses ~64 gallons of hot water per day. I suppose I can just plug that number in but it does seem a bit low. What about all the other energy uses in the house? It will have LED lights and Energy Star appliances so I expect the number to be fairly low. The actual usage is a wildcard. In this case, the home will be occupied with 4 people, 2 being young children.
Does anyone have any resources to share? The AJH has offered a spreadsheet that shows 77 kBTU per sq foot which seems ludicrous. They are amenable to alternate calculations, I am having trouble finding good options.
Albert Einstein
Comments

This is new construction? Don't know of any general info, but for what it's worth Cedric's home uses 30 kWh per day of electricity, and is sort of average in terms of appliances and lights…
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England1 


Thanks for the response. What region are you in? I expect the number to be a little higher in Zone 7 and 10,000 HDD but still can't get near their number. Not to mention, this house is really tight and wellinsulated!
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 

I mssed that 129,000 kWh per year (the type was too small).
That's just nuts. I'd expect a tenth of that — if that.
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 
So far what I have for lighting and misc is 11,950 KW (this is a serious SWAG), For DHW I am at 5,256KW, and Heating at (10,00 HDD) 24,648 KW. The heating design day is 11.7 BTU/sq ft.
I am very comfortable with the heating and DHW numbers. I don't like having that big of a SWAG on the other.
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 
I use NREL's PVWAtts regularly. I haven't found anything useful for the rest yet.
"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 
Thanks for the response. What region are you in? I expect the number to be a little higher in Zone 7 and 10,000 HDD but still can't get near their number. Not to mention, this house is really tight and wellinsulated!
Smaller and warmer but still. 4000 HDD65 or so in a century plus old house with a 18kbtu/h heat loss. This is using a heat pump I assume?
0 
I pay over 25 cents a kWh. 129,000 would be over $30K a year. I think I would notice that.
0
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