ABC - T (Agency Billing and Collection - Transportation) Service

When buying your natural gas from an energy marketer at a negotiated price, a Gas Supply Charge appears on your bill.

For a fee, this dollar amount is forwarded to the energy marketer named on the bill.

ABM (Agent, Broker, Marketer); Energy Marketer

A company that purchases, delivers, and sells natural gas to you. They are not regulated by the Ontario Energy Board (OEB).

Affiliated Gas Users

Two or more gas distributors associated through 50% ownership of each others' shares.

AFUE (Annual Fuel Utilization Efficiency)

AFUE compares the percentage of heat delivered to your home to that lost through your chimney.

The Ontario government's minimum standard is 78%. Mid - efficiency furnaces deliver approximately 80% AFUE and high - efficiency furnaces deliver 96% or more. Older furnaces deliver less then 60% and are no longer approved for sale in Canada.

Air Flow Volume

The amount of air a system circulates through your home in cubic feet per minute (CFM). Proper air flow depends on the outdoor and indoor units, ductwork, and clean filters.

Air Handler

A furnace or a blower coil moves cooled or heated air throughout the ductwork of your home.

Annual Contract Demand ("ACD")

The volume of gas obtained by adding up the Contract Demand for each day of a contract year.

Annual Turnover Volume ("ATV")

The sum of the contracted volumes injected into and withdrawn from storage by an applicant within a contract year.

Annual Volume Deficiency

The difference between the Minimum Annual Volume and the volume actually taken in a contract year, if such volume is less than the Minimum Annual Volume.


The party who makes application to the Company for one or more of the services of the Company and such term includes any party receiving one or more of the services of the Company.

Authorized Volume

In regards to Sales Service Agreements, the Contract Demand.

In regards to Bundled Transportation Service arrangements, the Contract Demand (CD) less the amount by which the Applicant's Mean Daily Volume (MDV) exceeds the Daily Delivered Volume (Delivery) and less the volume by which the Applicant has been ordered to curtail or discontinue the use of gas (Curtailment Volume) or otherwise represented as:

CD - (MDV - Delivery) - Curtailment Volume



A service whereby alternative supplies of gas may be available in the event that an Applicant's supply of gas is not available for delivery to the Company.

Banked Gas Account

A record of the amount of gas delivered by the Applicant to the Company in respect of a Terminal Location (credits) and of volume of gas taken by the Applicant at the Terminal Location (debits).


A measuring system to determine the intensity of sound. It equals ten decibels. Higher numbers equal greater noise. A diesel truck 10 feet away is rated at 9.2 bels; a refrigerator is 7.0 bels.

Billing Contract Demand

Applicable only to new customers who take Dedicated Service under Rate 125. The Company and the Applicant shall determine a Billing Contract Demand which would result in annual revenues over the term of the contract that would enable the Company to recover the invested capital, return on capital, and O&M costs of the Dedicated Service in accordance with its system expansion policies.

Billing Month

A period of approximately thirty (30) days following which the Company renders a bill to an applicant. The billing month is determined by the Company's monthly Reading and Billing Schedule. With respect to rate 135 LVDC's, there are eight summer months and four winter months.


Ontario Energy Board (OEB).


A gas - fired heating system that delivers hot water through pipes to radiators or baseboards. A boiler is not a water heater.

BTU (British Thermal Unit)

A measuring system to quantify the amount of energy required to change the temperature of one pound of water by one degree Fahrenheit. For your home, it represents the measure of heat generated when fuel is burned or the heat extracted from your home for cooling.

Budget Billing Plan (BBP)

Our Budget Billing Plan estimates your gas use and divides charges into 11 installments from September to July. The best time to join is in September at the start of the heating season.

New gas customers are automatically assigned to the Budget Billing Plan unless you request otherwise.

Bundled Service

A service in which the demand for natural gas at a Terminal Location is met by the Company utilizing Load balancing resources.

Buy/Sell Arrangement

An arrangement, the terms of which are provided for in one or more agreements to which one or more of an end user of gas (being a party that buys from the Company gas delivered to a Terminal Location), an affiliate of an end user and a marketer, broker or agent of an end user is a party and the Company is a party, and pursuant to which the Company agrees to buy from the end user or its affiliate a supply of gas and to sell to the end user gas delivered to a Terminal Location served from the gas distribution network. The Company will not enter into any new buy/sell agreement after April 1, 1999.

Buy/Sell Price

The price per cubic meter which the Company would pay for gas purchased pursuant to a Buy/Sell Arrangement in which the purchase takes place in Ontario.

Buy/Sell; Rebate Program

A rebate cheque issued to you if the price paid for gas by the energy marketer in a Buy/Sell Arrangement is lower than the approved utility price.


CFM (Cubic Feet per Minute)

A standard measurement of airflow. A typical system requires 400 CFM airflow per ton of air conditioning.


A network of tubes filled with refrigerant, sometimes called the cooling or evaporator coil. A coil takes heat and moisture out of the air by evaporating a liquid refrigerant.

Commodity Charge

A charge per unit volume of gas actually taken by the Applicant, as distinguished from a demand charge which is based on the maximum daily volume an Applicant has the right to take.


Enbridge Gas Distribution Inc.


The part of the outdoor air conditioner or heat pump that compacts and pumps refrigerant through the system.


A network of tubes located in an outdoor unit that removes heat from hot, gaseous refrigerant to make it liquid again. Sometimes called the condenser coil.

Contract Demand

A contractually specified volume of gas applicable to service under a particular Rate Schedule for each Terminal Location which is the maximum volume of gas the Company is required to deliver on a daily basis under a Large Volume Distribution Contract.

Cubic Metre ("m³")

That volume of gas which at a temperature of 15 degrees Celsius and at an absolute pressure of 101.325 kilopascals ("kPa") occupies one cubic metre. 10³m³ equals 1,000 cubic metres.


An interruption in an Applicant's gas supply at a Terminal Location resulting from compliance with a request or an order by the Company to discontinue or curtail the use of gas.

Curtailment Credit

A credit available to interruptible customers to recognize the benefits they provide to the system during the winter months.

Curtailment Delivered Supply (CDS)

An additional volume of gas, in excess of the Applicant's Mean Daily Volume and determined by mutual agreement between the Applicant and the Company, which is Nominated and delivered by or on behalf of the Applicant to a point of interconnection with the Company's distribution system on a day of Curtailment.

Customer Charge

A monthly fixed charge that reflects being connected to the gas distribution system.


Daily Capacity Repurchase Quantity

The Applicant's average daily gas use during one year's five highest demand days.

Daily Consumption vs Gas Quantity

The volume of natural gas taken on a day at a Terminal Location as measured by daily metering equipment or, where the Company does not own and maintain daily metering equipment at a Terminal Location, the volume of gas taken within a billing period divided by the number of days in the billing period.

Daily Delivered Volume

The volume of gas accepted by the Company as having been delivered by an Applicant to the Company on a day.

Daily Gas Quantity

The volume of natural gas used in one day, measured by daily metering equipment or an average of the daily amount used in a billing period.


A bladed opening used to regulate airflow to certain rooms through the air outlet, air inlet or duct.

Dedicated Service

An Unbundled Service provided through a gas distribution pipeline that is initially constructed to serve a single customer, and for which the volume of gas is measured through a billing meter that is directly connected to a third party transporter or other third party facility, when service commences.

Delivery Charge

A component of the Rate Schedule through which the Company recovers its operating costs.

Demand Charge

A fixed monthly charge which is applied to the Contract Demand specified in a Service Contract.

Demand Overrun

The amount of gas taken at a Terminal Location exceeding the Contract Demand.


  • The pricing of products and services without approval of a federal regulatory body.
  • The process of changing government control over how and at what price natural gas is sold.

Deregulation will not compromise the safety or the reliability of our distribution system.

Direct Purchase

Natural gas supply purchase arrangements transacted directly between the Applicant and one or more parties, including the Company.

Disconnect and Reconnect Charges

The charges levied by the Company for disconnecting or reconnecting an Applicant from or to the Company's distribution system.


Delivery of gas on a day to a delivery point different from the normal delivery point specified in a Service Contract.


Enbridge Gas Distribution

Enbridge Gas Distribution Inc.

Energy Marketer

Please see ABM (Agent, Broker, Marketer)


Firm Service Tendered ("FST")

TCPL transports a fixed total annual volume of natural gas from Western Canada to Ontario. Daily and seasonal transportation may vary at their discretion.

This service is used

  • by Applicants in conjunction with Ontario Buy/Sell and Ontario T - service arrangements or
  • by Enbridge in conjunction with Western Buy/Sell or T - service arrangements

Firm Service

A service for a continuous delivery of gas without curtailment, except under extraordinary circumstances.

Firm Transportation ("FT")

Firm Transportation service offered by upstream pipelines to move gas from a receipt point to a delivery point, as defined by the pipeline.

Force Majeure

Any cause not reasonably within the control of the Company and which the Company cannot prevent or overcome with reasonable due diligence, including:

  1. physical events such as an act of God, landslide, earthquake, storm or storm warning such as a hurricane which results in evacuation of an affected area, flood, washout, explosion, breakage or accident to machinery or equipment or lines of pipe used to transport gas, the necessity for making repairs to or alterations of such machinery or equipment or lines of pipe or inability to obtain materials, supplies (including a supply of services) or permits required by the Company to provide service;
  2. interruption and/or curtailment of firm transportation by a gas transporter for the Company;
  3. acts of others such as strike, lockout or other industrial disturbance, civil disturbance, blockade, act of a public enemy, terrorism, riot, sabotage, insurrections or war, as well as physical damage resulting from the negligence of others;
  4. in relation to Load Balancing, failure or malfunction of any storage equipment or facilities of the Company; and
  5. governmental actions, such as necessity for compliance with any applicable laws.



Natural Gas.

Gas Delivery Agreement

A written agreement pursuant to which the Company agrees to transport gas on the Applicant's behalf to a specified Terminal Location.

Gas Distribution Network

The physical facilities owned by the Company and utilized to contain, move and measure natural gas.

Gas Purchase Agreement

A written agreement where Enbridge agrees to purchase gas from an Applicant as part of a Buy/Sell Arrangement.

Gas Sale Contract

A written agreement pursuant to which the Company agrees to supply and deliver gas to a specified Terminal Location.

Gas Supply Charge

A charge for the gas commodity purchased by the applicant.

Gas Supply Load Balancing Charge

A charge in the Rate Schedules where the Company recovers the cost of ensuring gas supply matches consumption on a daily basis.

General Service Rates

The Rate Schedules applicable to those Bundled Services for which a specific contract between the Company and the Applicant is not generally required. The General Service Rates include Rates 1, 6, and 9 of the Company.

Gigajoule ("GJ")

See Joule.

Golden Age Service

This popular program for residential customer 65 years or older includes a free newsletter and a choice of service options to suit their needs.


Heat Pump

An air conditioner that operates in reverse:

  • transfers heat from your house to the outdoors during the summer, and
  • transfers heat from the outdoors into your house during the winter.

Heat pumps can be more efficient than other forms of heating, because they do not create heat; they just move it from one place to another.

High - or Mid - Efficiency Furnace

High - efficiency furnaces are "condensing" furnaces, which means that the steamy chimney gases are cooled from about 350°F to about 100°F. Steam then condenses back into water, allowing more heat to be recovered. A high - efficiency furnace offers you a higher AFUE or energy efficiency rating, which saves fuel.

Mid - efficiency furnaces are not condensing.

Hourly Demand

A contractually specified volume of gas applicable to service under a particular Rate Schedule which is the maximum volume of gas the Company is required to deliver to an Applicant on a hourly basis under a Service Contract.


A common industry short - form of Heating, Ventilation and Air Conditioning.

HVAC Contractor

A HVAC expert who can help you with many home comfort issues, including:

  • Problems with heating ducts or radiators
  • Balancing of a warm air system
  • Replacement of an exhaust vent
  • Installation of a metal chimney liner
  • Problems with central air conditioning
  • Installation of a natural gas appliance
  • Corrective measures if you need to improve air supply or ventilation in your home


Imperial Conversion Factors

1,000 cubic feet (cf)
= 1 Mcf
= 28.32784 cubic metres (m³) 1 billion cubic feet (cf)
= 28.32784 106 m³

1 pound force per square inch (p.s.i.)
= 6.894757 kilopascals (kPa)

1 inch Water Column (in W.C.) (60°F)
= 0.249 kPa (15.5°C)

1 million British thermal units
= 1 MMBtu
= 1.054615 gigajoules (GJ)
948,213.3 Btu
= 1 GJ

Monetary Value:
$1 per Mcf
= $0.03530096 per m³
$1 per MMBtu
= $0.9482133 per GJ

Interruptible Service

Gas service which is subject to curtailment for either capacity and/or supply reasons, at the option of the Company.

Intra - Alberta Service

Firm transportation service on the Nova pipeline system under which volumes are delivered to an Intra-Alberta point of acceptance.


Joule (J)

The amount of work done when the point of application of a force of one newton is displaced a distance of one metre in the direction of the force. One megajoule ("MJ") means 1,000,000 joules; one gigajoule ("GJ") means 1,000,000,000 joules.


Large Volume Distribution Contract (LVDC)

A written agreement pursuant to which the Company agrees to supply and deliver gas to a specified Terminal Location.

Large Volume Distribution Contract Rates

The Rate Schedules applicable for annual consumption exceeding 340,000 cubic metres of gas per year and for which a specific contract between the Company and the Applicant is required.

LDCs (Local Distribution Company)

Your local natural gas utility such as Enbridge Gas Distribution Company Ltd.

Load - Balancing

The balancing of the gas supply to meet demand. Storage and other peak supply sources, curtailment of interruptible services, and diversions from one delivery point to another may be used by the Company.


Make - up Volume

A volume of gas nominated and delivered, pursuant to mutually agreed arrangements, by an Applicant to the Company for the purpose of reducing or eliminating a net debit balance in the Applicant's Banked Gas Account.

Mean Daily Volume (MDV)

The volume of gas which an Applicant who delivers gas to the Company, under a T-Service arrangement, agrees to deliver to the Company each day in the term of the arrangement.

Metric Conversion Factors

Common conversion calculations related to natural gas usage:

1 cubic metre (m³)
= 35.30096 cubic feet (cf)
1,000 cubic metres
= 10³m³
= 35,300.96 cf
= 35.30096 Mcf
28.32784 m³
= 1 Mcf

1 kilopascal (kPa)
= 1,000 pascals
= 0.145 pounds per square inch (p.s.i.)
101.325 kPa
= one standard atmosphere

1 megajoule (MJ)
= 1,000,000 joules
= 948.2133 British thermal units (Btu)
1 gigajoule (GJ)
= 948,213.3 Btu
1.054615 GJ
= 1 MMBtu

Monetary Value:
$1 per 10³m³
= $0.02832784 per Mcf
$1 per gigajoule
= $1.054615 per MMBtu

Minimum Annual Volume

The minimum annual volume as stated in the customer's contract, also Section E.


Natural Gas

Natural and/or residue gas comprised primarily of methane.

Nominated Volume

The volume of gas which an Applicant has advised the Company it will deliver to the Company in a day.

Nominate, Nomination

The procedure of advising the Company of the volume which the Applicant expects to deliver to the Company in a day.


Statements by Applicants of the volume of gas they expect to deliver in a day.


Ontario Energy Board (OEB)

An agency of the Ontario Government which, amongst other things, approves the Company's Rate Schedules (Part V of this HANDBOOK) and the matters described in Parts III and IV of this HANDBOOK.

Ontario Energy Marketers Association (OEMA)

An industry association made up of marketers, utilities and public interest groups to monitor the conduct of its members. Formerly known as Direct Purchase Industry Committee (DPIC).

Overrun Gas

That amount of gas used exceeding the Authorized Volume.


Point of Acceptance

The point at which the Company accepts delivery of a supply of natural gas for transportation to, or purchase from, the Applicant.

Pre - authorized Payment Plan (PAP)

Payment of your gas bill through an automatic withdrawal from your bank account.

It prevents missed payments and save time, cheque - writing and postage. For details, refer to our Pre - authorized Payment Plan Guide.


Rate Schedule

A numbered rate of the Company as fixed or approved by the OEB. that specifies rates, applicability, character of service, terms and conditions of service and the effective date.

Rebate Program; Buy/Sell

Please see Buy/Sell Rebate Program above.


A fluid that evaporates at a relatively low temperature, sucking heat and humidity out of the air as it does.

Removal Permit

A permit issued by the government of a province that allows the removal of gas from the province.

Required Orders

Orders or evidence of authorization needed to allow a Direct Purchase arrangement.

R - Value

Refers to insulation's resistance to heat flow, not thickness.

Tiny air pockets trapped inside resist the passage of heat. The higher the insulation's R - Value, the greater its insulating power.


Sales Service

An Enbridge service that acquires and sells an Applicant the natural gas they require.

Seasonal Credit

A credit applicable to Rate 135 customers to recognize the benefits they provide to the storage operations during the winter period.

Seasonal Energy Efficiency Ratio (SEER)

A measure of cooling efficiency for air conditioners. The higher the SEER, the more energy - efficient the unit. The government's minimum SEER rating is 10.

Service Contract

An agreement between the Company and the Applicant which describes the responsibilities of each party in respect to the arrangements for the Company to provide Sales Service or Transportation Service to one or more Terminal Locations.

Split System

A central air conditioning or heat pump system in which some components are located inside the home and others outside. This is the most common type of home system.

Supply Overrun

Overrun gas where the Authorized Volume is less than or equal to the Contract Demand.

System Sales Service

A service of the Company in which the Company acquires and sells to the Applicant the Applicant's natural gas requirements.



Transportation Service.


TransCanada PipeLines Limited

Terminal Location

The building or other facility of the Applicant at or in which natural gas will be used by the Applicant.


An automatic switch that controls the functions of a heating and cooling system.

Third Party Notification

A useful plan for people with impaired vision or other concerns, which have difficulty ensuring their bill, is paid on - time. You designate a Third Party (neighbour or clergyperson) who is willing to help. A key contact for our customer service representative if required.

For details, refer to our Third Party Notification Brochure.


Common measure of a central air conditioning system's capacity. One ton of air conditioning removes 12,000 BTUs of heat energy per hour. Residential air conditioners usually range from one to five tons.

Transportation Service

A service in which the Company agrees to transport gas on the Applicant's behalf to a specified Terminal Location.

Transportation to Enbridge

The bill item that reflects the cost of transporting gas, including tolls, from the well to our distribution system in Ontario.

T - Service (Transportation Service) Arrangement

An arrangement where the energy marketer purchases natural gas from a supplier on behalf of its customers and contracts. Another company will deliver to each customer's home or business.


Unbundled Service

A service in which the demand for natural gas at a Terminal Location is met by the Applicant contracting for separate services (upstream transportation, load balancing/storage, transportation on the Company's distribution system) of which only Transportation Service is mandatory with the Company.


Western Canada Buy Price

The price per cubic metre which the Company would pay for gas pursuant to a Buy/Sell Agreement in which the purchase takes place in Western Canada.



A way to increase your home comfort and energy efficiency by controlling when and where heating and cooling occurs in a home. Programmable thermostats are used to control the equipment's operating times. Dampers are used to direct air flow to certain parts or "zones" of the home.