According to the MMBtu reference 3412 BTUs = kWh and MMBTU = 10

PG&E Tarrifs, too

Watt = joule/sec, kWh = 3,600,000 joules = 3.6 10^{6} joules.

In particular on 2008 Dec 15 I see roughly $6/MMBtu for natural gas and $70/(megawatt hour) for electricity. At that price my kW electric heater costs about $0.07 per hour. The same energy by gas is ($6/MMBTU)*.0034 MMBTU = $.018 Running my gas furnace heats my room in a similar period and heats the rest of the house to a much lesser extent. I need to read my gas meter twice when the furnace is running.

On 2009 Mar 26 I see prices gas: $4/MMBtu, Elec: $30/Mwh. (20H GMT)

It takes 34 sec for one complete rotation of ‘half foot’ dial which is subdivided by 10 equally spaced marks.

Implicit in this patent is that a two-foot dial does one rotation (total range) for two cubic feet of gas. From this I assume that I consume 34/30 = 1.1 CuFeet per minute.

My PG&E bill speaks of Therms each of which seems to be very near one unit of meter reading.
I suppose that therm = 10^{5} BTU = 1.055 10^{8} joules.

It seems from my PG&E bill that a meter unit is 100 ft^{3} which yields 1.0165 Therms.
The ‘Baseline’ rate, which I pay, is $1.069/Therm in Nov 2008.
That these two numbers are very near one seems indeed to be a coincidence.

On 2008 Dec 31 Russia asks $250/10

m

price = $0.007/ft

stuff | sold unit | in joules | $/unit | |

electricity | kWh | 3.6 10^{6} | 0.115 | |

gas | therm | 1.055 10^{8} | 1 |