Quick answer: how to choose a furnace in Ottawa
Brand matters less than you think.
Most furnaces sold in Canada come from a handful of manufacturers and share similar parts. Installation quality and local parts supply matter more.
Efficiency is set by law.
New gas furnaces in Canada must be at least 95% AFUE, so every brand on this list offers 95–99% AFUE models.
Type changes comfort.
Single-stage is cheapest, two-stage is the sweet spot for most Ottawa two-storey homes, and modulating gives the steadiest temperatures.
Sizing is critical.
An oversized furnace short-cycles, wastes gas and leaves cold rooms. Ask for a room-by-room load calculation.
Typical installed price
$4,500 – $8,500 for a 96–98% AFUE furnace, up to about $10,500 for variable-speed or modulating models.
Does furnace brand really matter?
Brand matters for three practical reasons: how long the manufacturer has been around, how fast parts reach Ottawa, and how well the dealer network supports warranty claims. Beyond that, the differences between major brands are smaller than the marketing suggests.
Many familiar names are owned by the same few companies. Lennox International also makes Armstrong Air and Ducane. Daikin owns Goodman and Amana. Carrier owns Bryant and the ICP family, which includes KeepRite. Trane and American Standard sit under Trane Technologies, and York belongs to Johnson Controls.
What changes from one install to the next is the work behind the furnace: sizing, venting, gas piping, duct static pressure and the start-up checks. A mid-range furnace installed well will outlast and outperform a premium furnace installed badly.
Best furnace brands for Ottawa homes compared
Here is how the brands we see most often in Ottawa basements line up. Oria is a Lennox authorized dealer, also installs Goodman and other major brands, and repairs every make and model.
| Brand | Parent company | Positioning | Worth knowing in Ottawa |
|---|---|---|---|
| Lennox | Lennox International | Premium | Top Signature models (such as the SLP99V) are rated up to 99% AFUE with variable-capacity burners. Strong dealer network. |
| Goodman | Daikin | Value | Simple, widely stocked parts and a lower upfront price. A popular choice for rentals and budget-minded upgrades. |
| Carrier / Bryant | Carrier | Premium to mid-range | Wide range of two-stage and modulating models. Carrier and Bryant share much of the same engineering. |
| Trane / American Standard | Trane Technologies | Premium | Known for durable cabinets and quiet operation. Higher upfront cost. |
| Daikin / Amana | Daikin | Mid-range to premium | Pairs well with Daikin heat pumps for hybrid (dual-fuel) systems. |
| Napoleon | Napoleon (Barrie, Ontario) | Mid-range | Canadian-owned manufacturer, also known for gas fireplaces and BBQs. |
| KeepRite | ICP (Carrier) | Mid-range | Long-standing Canadian brand name with broad parts availability. |
| York | Johnson Controls | Mid-range | Solid two-stage and modulating options at competitive prices. |
If you are weighing Lennox against Goodman, read our side-by-side Goodman vs Lennox comparison. For specific high-efficiency models, see our list of high-efficiency furnaces for Ottawa homes.
Single-stage, two-stage and modulating furnaces explained
The burner type has a bigger effect on everyday comfort than the badge on the cabinet. It decides how evenly your home heats, how often the furnace cycles and how loud it is.
Single-stage furnaces have two settings: off and full blast. When the thermostat calls, the burner fires at 100% until the room near the thermostat is satisfied. Rooms far from the thermostat, like a finished basement or a bedroom over the garage, often lag behind.
Two-stage furnaces add a low fire, usually around 60–70% of full output. They run on low most of the winter and step up to high on the coldest days. Longer, gentler cycles mean fewer hot and cold spots.
Modulating furnaces adjust the flame in small steps, often from about 35–40% up to 100%. Paired with a variable-speed blower, they match the heat loss of the house almost minute by minute.
Furnace types side by side
| Single-stage | Two-stage | Modulating | |
|---|---|---|---|
| Burner settings | Off / 100% | Off / low / high | Many small steps |
| Comfort | Noticeable temperature swings | Even in most homes | Steadiest temperatures |
| Noise | Loudest at start-up | Quiet on low fire | Quietest |
| Typical AFUE (new) | 95–96% | 96–97% | 97–99% |
| Typical installed price | $4,500 – $8,500 | $4,500 – $8,500 | Up to about $10,500 |
| Best for | Bungalows, small townhomes, short-term owners | Most two-storey Ottawa homes | Larger homes, long-term owners, comfort-focused buyers |
Because every new gas furnace must hit 95% AFUE, the gas savings between types are modest. The bigger gains come from comfort and from the variable-speed (ECM) blower, which uses far less electricity than older PSC blower motors when the fan runs for long periods.
Final prices depend on the home, the equipment and the venting and ductwork. Oria gives free quotes on any equipment purchase, and our furnace replacement cost guide breaks the numbers down further.
Which furnace type fits your home?
Bungalow or small townhouse
A single-stage furnace with a variable-speed blower is often enough for a compact, one-level home in Barrhaven or Orléans. Two-stage is a small step up if you want quieter operation.
Two-storey home with a finished basement
This is the classic Kanata or Stittsville layout: hot upstairs, cool basement. A two-stage or modulating furnace with a variable-speed blower runs longer, gentler cycles that mix air between floors. Duct balancing and return air upgrades often matter as much as the furnace itself.
Planning to stay 10+ years
If you expect to stay put, a modulating furnace pays you back in comfort and lower blower electricity every winter. It is also a good match for a future heat pump in a hybrid setup.
Selling within a few years
A reliable 96% AFUE single-stage or two-stage furnace from a well-supported brand is usually the smart choice. Buyers care that it is new, safe and permitted, not how many stages it has.
What matters more than the brand
A proper load calculation.
Many older Ottawa furnaces were oversized. Right-sizing improves comfort and cuts short-cycling. Our furnace sizing guide explains how it is done.
Venting done right.
High-efficiency furnaces vent through PVC pipes on an outside wall. Clearances from windows, grade and snow lines matter in Ottawa winters.
Licensed, permitted work.
Gas appliance installs in Ontario fall under TSSA rules. Oria is TSSA and HRAI approved, and every technician holds gas and refrigeration licences.
Local support.
Pick a contractor who answers the phone at 2 a.m. in January. Oria offers 24/7 emergency service.
Warranty registration.
Manufacturer warranties vary by brand and model and usually need online registration. Ask your installer to handle it and keep the paperwork.
Johnny G. summed up a good install simply: “Got a new furnace installed in my home and had the best experience!”
Get a furnace recommendation for your home
The right furnace depends on your square footage, layout, ductwork and how long you plan to stay. Oria has been installing furnaces in Ottawa since 2014, and we will compare brands and furnace types for your home in plain numbers. Rebates may be available, and Oria will check current programs for your home on our HVAC rebates page. Book a free quote through our furnace installation service or call (613) 866-1869. Financing starts from $49/month on approved credit.
Frequently Asked Questions
What is the most reliable furnace brand?
No single brand is the most reliable in every home. Lennox, Carrier, Trane, Goodman, Daikin, York and Napoleon all build dependable 95%+ AFUE furnaces. Reliability depends more on correct sizing, proper venting, clean gas piping and yearly maintenance than on the name. Choose a well-supported brand with parts stocked locally and a licensed installer you trust.
Is Lennox worth the extra cost over Goodman?
Lennox is worth it if you want premium features such as variable-capacity burners up to 99% AFUE, quieter operation and advanced thermostats. Goodman is a solid value choice with simpler parts and a lower upfront price. Both perform well in Ottawa when properly installed. Oria is a Lennox authorized dealer and also installs Goodman, so we can quote both.
Is a two-stage furnace worth it in Ottawa?
For most two-storey Ottawa homes, yes. A two-stage furnace runs on low fire most of the winter, which gives longer, quieter cycles and more even temperatures between floors. It usually costs a little more than single-stage. In a small bungalow or townhouse, a single-stage furnace with a variable-speed blower is often enough.
What AFUE rating should I buy for an Ottawa home?
Every new gas furnace sold in Canada must be at least 95% AFUE, so your choice is really between about 95% and 99%. A 96–97% model suits most homes. Higher-AFUE modulating furnaces save a little more gas and improve comfort, which adds up over 15–20 Ottawa winters if you plan to stay in the home.
How much does a new furnace cost in Ottawa?
A high-efficiency gas furnace replacement typically costs $4,500 – $8,500 installed in Ottawa, and variable-speed or modulating models can reach about $10,500. The final price depends on the home, the equipment and the venting and ductwork. Oria gives free quotes on any equipment purchase, and financing is available from $49/month on approved credit.
Should I replace my furnace and air conditioner together?
If your AC is more than 10–12 years old, replacing both together often makes sense. You get matched equipment, one installation visit and sometimes better pricing. A furnace and AC combo typically costs $8,000 – $15,000 installed in Ottawa. If the AC is newer and working well, replacing only the furnace is usually fine.
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