Kat-egorically Speaking 12/18/08
Thursday, December 18th, 2008Energy Basics, Pt.1. What is a therm?
Here’s one of the most basic terms in the natural gas market. You see it on your utility bills.
So…what does it mean? A therm is equal to 100,00 BTU, or British Thermal Units. A British Thermal Unit is the amount of thermal energy required to raise the temperature of 1 pound of water 1 degree Fahrenheit at sea level. Another way of looking at this is: a therm could raise 1,000 pounds of water 100 degrees, and we could all take a very hot bath.
Why “British”? Because the Brits were the ones to come up with this measurement – smart guys those Brits.
Here are some conversion basics for you to contemplate.
1 therm = 100,000 BTU
1 cubic foot of gas = 1,000 BTU
1 ccf = 100 cubic foot of gas
So 1 ccf = how many therms? Did you guess 1?
Actually, to be technically accurate, 1 ccf = approx. 1.08 therms. The conversion for this measure depends on the time of year; however, we can use an “estimate” of 1.08 and be fairly close. The thing to remember is that therms are measuring heat produced, cubic feet is measuring volume. Things other than volume can effect the amount of heat you get from a cubic foot of gas.
For price comparisons, note that they’re not exactly the same.
Other terms you will see: 1 Mcf = 1,000 cubic foot of gas = 1,000,000 Btu (1mmBtu) = 1dekatherm (dth) = 10 therms
Often times your utility company reads your meter in ccf. They convert that ccf into therms on your bill. The natural gas market trades in dekatherms (dth) and you will often see discussions about mmbtu.
And you thought I was going to let you off easy just because it’s almost Christmas! It’s all about following the zeros. More on following the zeros below.
On that happy note, next year we will discuss “Is there life on the Planet NYMEX.” Everyone at C2 Intl wishes you and your family a wonderful Holiday Season and a Healthy, Happy New Year.
If you’d like to run those numbers one more time, Give me a call and tell me what’s on your mind.