Factoring Elevation into Billing

We use a Pressure Elevation Factor (PEF) to help ensure accurate billing.

Atmospheric pressure can affect your meter reading. Natural gas expands at lower atmospheric pressures and contracts at higher. In other words, it expands on mountains and shrinks in valleys. We use a PEF to ensure appropriate billing at any elevation.

Find your pressure elevation factor.

We calculate PEF according to federal government guidelines. Then we multiply it by your metered gas use to get a more accurate reading and base your bill on this calculation. For example, a home in Toronto that uses 3,737 cubic metres annually will have a PEF of 1.0057. This corresponds to a consumption increase of about 18 cubic metres every year.


Click on the letter that your city's name begins with to verify the Pressure Elevation Factor used to adjust your gas consumption.

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