Gas heat here depends on which street you live on.

Maybe. Énergir's distribution network reaches only part of the municipality, and coverage tends to follow specific streets and newer subdivisions rather than the town as a whole. The only reliable way to know is to check with Énergir directly using your address, or ask the local dealer we match you with, since installers who work in the Deux-Montagnes area generally know which blocks are served and which aren't. If your street isn't on the line, propane is the standard workaround for a gas-style fireplace.

Budget $6,000 to $15,000 CAD installed. A direct-vent insert going into an existing masonry firebox on a street already served by Énergir sits toward the lower end. A new built-in unit that needs a propane tank set, a longer gas line run, or venting through an exterior wall in a home without an existing chimney pushes toward the top. Because gas is the less common fuel choice here, get a firm quote before committing since costs vary more property to property in a partial-coverage town than in a place where every home already sits on the main.

Yes, with propane. A lot of Sainte-Marthe-sur-le-Lac homes outside Énergir's service area run a propane tank instead, and most gas fireplace and insert models a local dealer carries can be configured for either fuel. The tradeoff is the ongoing cost of propane deliveries versus a metered gas line, which is worth discussing with your dealer alongside the upfront install cost.

For a lot of households, not as primary heat. At roughly $0.078 per kWh, Hydro-Québec electricity is inexpensive enough that many Sainte-Marthe-sur-le-Lac homes run electric baseboards or heat pumps as their main system and treat any fireplace as ambiance rather than a cost-saver. Where gas earns its keep is instant, adjustable flame with none of the venting hassle of wood, plus backup heat during a storm if paired with a battery-backed ignition system. If the goal is the cheapest possible heat, electric usually wins on the bill; if it's convenience and a real flame without stacking wood, gas or propane fits better.

Yes. You'll need a permit through the municipal building department, and the installation itself has to meet CSA B365 code, which governs solid-fuel and gas-fired appliance installations across Quebec. Most local dealers installing gas fireplaces in the Deux-Montagnes area handle the permit application and coordinate the licensed gas-fitter work as part of the project, so you're not managing separate trades yourself.

Direct-vent units pull outside air for combustion and exhaust everything back outside through sealed venting, which is the standard, code-compliant choice for daily use and works whether you're on Énergir's line or running propane. Vent-free models burn into the room and come with strict room-size limits. Given how many months a year a fireplace actually runs here, five-plus months of freezing nights, most dealers steer Sainte-Marthe-sur-le-Lac homeowners toward direct-vent for daily comfort and indoor air quality.

It depends on the ignition system, and it's a real question in this part of Quebec given the region's history with major ice storms. Units with intermittent pilot ignition run on a small battery backup that kicks in automatically during an outage. Standing-pilot models from manufacturers like Valor don't need electricity at all since the pilot's thermocouple generates its own current. If backup heat during an outage matters to you, ask your dealer specifically about the ignition system before choosing a model.

Plan on an annual check, ideally in late summer or early fall before the first cold snap rather than mid-winter when technicians across the Laurentides Region are booked solid. A technician checks the burner, pilot assembly, gas connections, and venting, and cleans the glass. Expect roughly $150 to $250 for a standard visit, less than what wood-burning households spend on an annual chimney sweep.

A gas insert is the common retrofit for older homes near the lake that already have a masonry fireplace, since it reuses the existing chimney chase with a liner. A built-in gas fireplace suits newer construction or an addition where the wall is being framed from scratch, common in some of the town's more recently built subdivisions. A freestanding gas stove is the least disruptive option if you don't have a chimney and don't want to build one, since it vents through a smaller wall penetration. Your local dealer will factor in whether you're on Énergir or propane before recommending a specific model.

Most modern gas fireplaces can—turn it on and off from the couch with a remote, or set a room temperature and let the fireplace hold the comfort zone for you. If low maintenance matters to your family, this is the feature set that makes gas the convenience pick over wood and pellet.

Because a fireplace is an iceberg—there's more behind the wall than in front of it. A low quote often covers only the unit; the full scope includes vent pipe, gas line or electrical, framing, and the tile or stone that has to come off and go back on. Make every bidder price the whole job. If a dealer can't speak to the full scope with confidence, that's your signal to keep looking.

Louvered fronts have grill work above and below the glass for airflow, move heat a little better with a fan, and suit traditional mantels. Clean face designs drop the louvers entirely so finish work runs to the fire's edge—they fit both modern and traditional rooms. When we did our own home we chose clean face: a big viewing area beat a little extra airflow. It depends on your room, not on a rulebook.

Ask three questions: Is it ugly? Is it drafty? Does it actually work? Most old fireplaces fail at least two. Beyond looks, an old unit leaks air around the damper year-round and—if it's gas with a standing pilot—quietly burns a couple hundred dollars a year. A modern replacement seals the wall, heats the room, and changes how the whole space gets used.