I use about 5-7 a month for two people in a small house during the
summer, but that includes a stove and dryer as well. I think about 90 a
month for a cold winter month, and this is in a 1948 house that is
pretty much uninsulated except for the attic floor.
replace "roosters" with "cox" to reply.
Well if you don't pay attention to climate, you're data is going to be 'all
over the map'.
My bill for last month was 155 therms for a 2600 sqft house and family of
four (gas laundry, gas water heater, gas stove, gas furnace). That's about
5.2 Therm/day. Mind you, in upstate NY we average about 1200 degree-days in
January alone. So I average about 0.11 Therms/degree-day. My neighbors
think that's a pretty low bill for January.
2,200 sf house in central California. Two people. Gas water heater,
electric range and clothes dryer. Only a few days in the low thirities.
Mostly high thirities to low forties. Bills ending middle of the month.
November .6 therms per day, December 2.0, January 3.2, February 3.1.
Average monthly usage for 2007 was 1.04 therms per day.
Don in Tracy, Calif.
Only in Calforny what the hell is a therm come from Canada and never
heard such a term take it it is to rate you energy use why not just
double the rates and wear sweaters. We are at -29 celius right now and
our gas meters are spinning away to the gas companies delight.
I am billed in dekatherms, and assuming 10 therms to the
dekatherm, my last bill (over 32 days) was for 5.96 Dth, therefore
59.6 therms, or 1.86 therms per day.
Background: small 1940s home in Oklahoma, mostly average
temperatures for the month, gas furnace and water heater.
Incidentally, the meter reads in Mcf; a BTU factor is applied
based on the quality of the gas received. The actual meter
reading was 5.8 Mcf.
During the summer readings have been in the 2-Dth range per month,
about 0.7 therms per day; however, this past October I replaced my
22-year-old water heater with a new tank, which should
theoretically use a bit less gas than its predecessor.
In fact, the BTU is one of the best of the British (actually now just
American) units. It's 1055 Joules, but as a rule of thumb you can think
of it as a kJ.
But having different units for every single energy source is just nuts.
Who else uses the therm, roughly .1 GJ, but the U.S. Gas industry?
www.oilnergy.com lists natural gas prices in MMBtu, where MM00*1000
or one million. That's pretty nice, just about the same thing as a GJ,
so we and the Canucks can actually think we are talking the same language.
[And MMBtu ~= MCF, so we have a three-way match]
George Cornelius cornelius ( A T ) eisner.decus.org
It's fairly useful for energy calculations when everything else is in
SAE, or whatever you call not metric. Insulation (in the US) is rated in
BTUs, square feet and degrees F. The amount of specific heat stored is 1
BTU per degree F per pound of water. Now if you mix in any metric, it
all becomes completely unwieldly. Either all metric or none at all makes
the most sense. I think we've had some rockets that smacked Mars because
Wikipedia isn't bad on the use of "therms":
For measurement units, it says:
Natural gas in the U.S. is measured in CCF (100 cubic feet), which is
converted to a standardized heat content unit called the therm, equal to
100,000 British thermal units. A BTU is the energy required to raise one
pound of water by one degree Fahrenheit. A U.S. gallon of water weighs 8.3
pounds. So, to raise a 40-gallon tank of 55 Â°F water up to 105 Â°F would
require 40 x 8.3 x (105 â 55) / 100,000 BTU, or approximately 0.17 CCF, at
100% efficiency. A 40,000 BTU (per hour) heater would take 25 minutes to do
this, at 100% efficiency. At $1 per therm, the cost of the gas would be
about 17 cents.
As for usage ... it goes on to say:
Water enters residences in the US at about 10 Â°C (50 Â°F) (varies with
latitude and season). Adults generally prefer shower temperatures of 40â49
Â°C (105â120 Â°F), requiring the water temperature to be raised about 30 Â°C
(55 Â°F) or more, if the hot water is later mixed with cold water. The
Uniform Plumbing Code reference shower flow rate is 2.5 gpm (gallons per
minute); sink and dishwasher usages range from 1â3 gpm.
You can also use bubble wrap over your windows.
It's been friggin cold near Chicago , 117 total therms or 3.77 per day
In article <b4059b0a-383b-4aee-bf87-c338803924d8@
Seattle, heat & water, 2800 sqft house (about 1800 sqft heated): My last bill
shows 3.8 therms/day last month and about 2.5 therms/day average for the past
Since San Jose is considerably warmer than Seattle, I suspect you could get
close to 2 therms/day down there...
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