Builders and contractors

Requirements for final inspection have changed

Enbridge Gas now requires an “Appliance Installer Validation Form” be completed and attached to the primary heating appliance, and any other appliance requiring setup and commissioning. The form confirms the requirements of CSA B149.1 section 4.3 have been fulfilled by the installer, and if the appliance is used during construction of the house, that the construction heat requirements have been met.

You can access this from through:

  • Download and print from your home or business for immediate use.
  • Order online and Enbridge Gas will ship to your address. This could take up to 10 business days.

Connect to gas

To convert to natural gas, complete the online application.

If you have questions, call our Customer Connections Contact Centre at 1-888-427-8888



Request a meter activation for temporary heat or inspections with the online form. 

Read the Guidelines to help you understand more about using natural gas for newly constructed commercial properties 


Need heat for construction?

Whether you use a portable heater or an approved appliance for construction heat, we can help.

Request for meter activation

Send a request for meter activation for temporary heat.

A charge of $70+hst per premise will be applied to your bill.

Note: For Construction Heat, only manufacturer’s certified installation instructions indicating acceptability of the appliance for construction heat use will be accepted.

Finishing heat

As furnace manufacturers have incorporated construction use instructions for their appliances, the TSSA is no longer acknowledging the need for the finishing heat process. Enbridge Gas will be discontinuing the use of finishing heat forms and will no longer be providing them for builders or heating contractors. Builders should transition to the construction heat program, a transition period will be acknowledged. The TSSA registered Heating Contractor/Installer will ensure 100% compliance as per the TSSA Advisory (FS-232-17).

Need more information on our temporary heat programs?

Refer to the 'Resources" tab of the Builder and Contractors section on the website.

Cancel an appointment

Submit the cancel a meter activation or inspection. At least 1 day advance notice is required. Same day cancellations may be subject to charges.

Initial installation checklist

  • All major construction and finishing work has been completed.
  • The home has been cleaned of all construction and finishing materials.
  • All gas equipment is fully installed as per local code and ready to be activated.
  • Furnace and ductwork are cleaned and new filters installed to ensure there is no residual drywall and/or construction debris.
  • Manufacturers' installation and operation instructions are present.
  • All interior/exterior gas piping is installed in accordance with all local code.
  • Pressure test tag(s) are complete and present.
  • All appliance vents (combustion and air intake) are installed in accordance with all local codes.
  • All gas pipe and appliance vents are sealed at entrance points.
  • All clearances to the natural gas meter and regulator(s) are met

  • Enbridge Gas is responsible to unlock a gas service that is off and locked. No other party can activate a gas service that is locked
  • Appliance setup and commissioning is the sole responsibility of the TSSA registered Heating Contractor/Installer.
  • In a situation where a final inspection reveals that proper set up and commissioning has not taken place, Enbridge will use the Safety Infraction process (sometimes referred to as a B-Tag). What you will see on the Safety Infraction will read “Appliance requires Commissioning as per CSA B149.1 Clause 4.3.1” The builder will require the Heating Contractor/Installer to return to perform the work and clear the Safety Infraction.
  • Appliances requiring set up and commissioning as per the manufacturer installation instructions, including Furnaces, Boilers and Combi-Heat/Hot Water units (Hot Water Tanks if noted in the manufacturer instructions)
  • Appliance set up and commissioning does not apply to gas appliances (unless noted by the manufacturer instructions), including BBQs, Fireplaces, Ranges and Dryers.
  • All furnaces used for construction or finishing heat must be commissioned by the HVAC Contractor prior to the inspection for home owner occupancy.


Send a request for inspections prior to homeowner occupancy.

Cancel an appointment

Submit the cancel a meter activation or inspection form. At least 1 day advance notice is required. Same day cancellations may be subject to charges.

To ensure you are not continuing to pay for natural gas service when the new homeowner moves in, you can provide closing dates (sale of their homes) to us.

We will transfer account and gas bills to the new homeowners on the closing date.

Complete a builder closing request.

Disconnect gas

Ensuring worker and public safety is our number one priority. Before any demolition work can begin on a property, the natural gas service must be safely disconnected by Enbridge Gas and natural gas lines must be located to avoid damage.

What you need to do

Before you dig - The law requires you to contact Ontario One Call to locate and mark underground pipes. Call 1-800-400-2255 or submit your request online. This 24/7 service is offered free of charge.

Disconnect gas - Contact us at 1-877-362-7434 to get started. We require a minimum of 44 days from the time your payment is received to the date the work is completed.

What we will do

  • Apply for a permit with the municipality.
  • Visit the site to assess the necessary resources and the cost to complete the work.
  • Provide a quote for the expected work. Our fee is regulated by the Ontario Energy Board. We require written confirmation that the property owner accepts these charges and consents to the cut off. If we don’t receive confirmation by a specified date, we can’t proceed with the work. At that point, the work request will be terminated.
  • Request underground utility locates for the area where we’ll be working.
  • Contact you to provide a scheduled cut-off date.


Appliance Installer Validation form
Setup and commissioning of an appliance is the responsibility of the Installer. The appropriate form for final inspection and construction use of appliances requires the use of the “Appliance Installer Validation Form” .
Appliance Installer Validation Form FAQ
Electrical Bonding of Gas Supply Piping and Tubing
Electrical Bonding of Gas Supply Piping and Tubing.
Hot Water Heater Turn On
Hot Water Heater Protocols During COVID-19.
Builder and Heating Contractor Update – Fall 2020
Industry update on Construction Heat, Commissioning Responsibilities and B Tag Process
Guideline for Builder Final Inspection
Guideline for Construction Heat Installations
Guideline for Construction Heat Installation
Residential Construction - Installing and Using Construction Heaters and Approved Furnaces
Guideline for Builder Site Preparation for Residential Construction Heat
Residential Temporary Heat - Builder Site Preparation
Third Party Activation for Construction Heat
Builder Notice - Effective January 1, 2016 for Residential Construction Heat
Residential Construction Heat Program – Frequently Asked Questions
Residential Temporary Heat Frequently Asked Questions
Furnaces used for Construction and Finishing Heat - TSSA Advisory
TSSA Advisory FS-232-17 Furnaces used for Construction Heat and Finishing Heat
TSSA Heating Fuels Update for Construction Heat
TSSA Vol. 1 Issue 1 March 2002 for Construction Heat
Guidelines for Commercial Temporary Heat and Inspections Before Occupancy
Help you understand more about using natural gas for newly constructed commercial properties
Joint Utility Construction
Joint Utility Construction in Residential Subdivisions
Meter Connections
Meter Connections to Flexible Supply Piping
Meter Box Installation
Meter Box Builder Installation Requirements 2019
Meter Box Technical Bulletin
Meter Box Guidelines - Builders' Technical Bulletin for the Ottawa Area 2011
Meter Box FAQ
Frequently Asked Questions for Meter Boxes
Meter Boxes with Construction Heat
Use of Construction Heat with Meter Boxes
Service Activation Tag
Builder Notice for Service Activations
Customer Pipe Sizing
Customer Pipe Sizing Installation Requirements
Relief Vent Clearance
Relief Vent Clearances for Electrical Equipement
Rejected Installations
Dealing Proactively with Rejected Installations

Need help?


Contractors should call Customer Connections Contact Centre for questions related to applications for natural gas or gas load changes 1-888-427-8888. Any other questions, can be directed to or


Questions related to:

  • Construction heat or inspections prior to occupancy, call Builder Services at 1-866-787-8566.
  • New residential construction, contact your regional representative.