Canada Gas Fireplaces · Practical planning
Gas fireplace inserts
Plan a gas insert for an existing fireplace: opening, chimney, venting, finishes and the complete conversion scope.
Canada Gas Fireplaces editorial team · Updated October 5, 2026 · Editorial approach
In this guide
What is a gas fireplace insert?
An insert is an appliance intended for a compatible existing fireplace opening. It is different from a built-in fireplace framed into a new enclosure. Compatibility with the existing fireplace and the selected installation system must be established before ordering.
Start with photographs of the opening, hearth and chimney, plus any accessible appliance identification. Give the installer the approximate dimensions, but have them verify the opening and the complete installation route on site.
Check the existing fireplace first
Ask whether the structure, opening, chimney and surrounding materials suit the proposed insert. A similar face size does not establish compatibility. Include the venting system, termination, gas supply and electrical requirements in the assessment.
A decorative surround can cover part of an opening without solving clearance or installation constraints. Request the appliance and surround dimensions together so the finished result is clear.
Compare the whole conversion
Request a quote for the exact model, removal or preparation, approved venting, connections, permits, finishing and commissioning. Identify who handles work outside the fireplace contractor’s scope.
Ask how the appliance will be serviced and what user controls or backup features are included. Keep the installation records and model manual for future maintenance.
Sources and current requirements
Confirm the current requirements for the property and the selected model. These guides do not replace professional assessment.