Hello:

With natural gas for home heating being so expensive now, was wondering a
bit about the calibration
of our gas meter.

a. How well do these things hold calibration ?

b. If they do "drift" some, is there a recognized tendency for them to show
more or less usage ?

c. What's a good rule of thumb regarding how often to request the gas
company to re-calibrate them ? Do they have to honor your request (by Law)
?

Thanks,
Bob