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| Square Footage | Furnace BTU |
|---|---|
| 1,000-1,200 sq. ft. Home | 40,000 - 60,000 BTU |
| 1,200-1,500 sq. ft. Home | 60,000 BTU |
| 1,500-1,800 sq. ft. Home | 60,000 - 80,000 BTU |
| 1,800-2,500 sq. ft. Home | 80,000 - 100,000 BTU |
| 2,500-3,500 sq. ft. Home | 100,000 to 120,000 BTU |
Most high-efficiency furnaces reduce the problem. The KeepRite Ion 98 G97CMN Review shows why this furnace is built to eliminate it completely.
Temperature swings, noisy cycling, dry winter air, rooms that never quite match the thermostat — these are the complaints that push homeowners toward modulating furnaces. Two-stage systems improve all of them. The G97CMN’s modulating burner solves them at the source by running at exactly the output level your home needs, sustained, quiet, and precise, rather than alternating between two fixed speeds.
That distinction matters before you spend $4,500 to $5,500 installed. This review explains what modulating actually delivers in a real Canadian home, where it earns its premium, and where it does not.
⚠️ Limited Inventory Notice: The G97CMN is currently listed as limited inventory by KeepRite. Confirm availability with a licensed local contractor before making your decision.
Before the specs, the price, or the comparisons — this is the honest filter.
The G97CMN makes sense when your heating problem is precision and consistency, not just efficiency. Homeowners who benefit most from modulating furnaces share a few specific frustrations: the house cycles through temperature swings all day, furnace noise interrupts sleep or conversation, or the upstairs and downstairs never settle at the same temperature regardless of how long the furnace runs.
If that describes your home, the G97CMN solves it more completely than any two-stage system can.
This furnace is the right call if:
This furnace is the wrong call if:
As highlighted in this KeepRite Ion 98 G97CMN Review, the honest installed range for a G97CMN in Canada is $4,500 to $5,500. That is equipment and labour together. Here is what actually pushes a quote toward the high end.
BTU configuration is the first variable. The equipment cost between a 60,000 BTU and a 120,000 BTU unit is meaningful, and larger units sometimes require gas line work that adds $300 to $600 before a single hour of installation labour.
Venting and ductwork are the second. The G97CMN uses two-pipe PVC direct venting. If your existing setup lines up cleanly, installation is straightforward. New venting runs through finished walls or ceilings, ductwork sizing adjustments for proper airflow, or permit complications all add real cost.
The Ion™ System Control is the third. This thermostat is what makes the G97CMN a connected system rather than just a very good furnace. It is not always included in base quotes. Confirm whether it is priced in — and if not, add it. Buying this furnace without the Ion control is like buying a car and leaving the instrument panel out.
Limited inventory dynamics can cut both ways. Some contractors with remaining stock discount aggressively to move it. Others price up because alternatives are scarcer. Know what comparable models cost before accepting the first number you receive.
Get three quotes from licensed KeepRite dealers. Installation labour in Hamilton prices differently than Oakville, and that gap is worth the time it takes to compare.
The technical difference between two-stage and modulating is well documented. What is harder to find is an honest account of what that difference feels like after six months of living with it.
A two-stage furnace runs at two settings — low fire and high fire. It is a significant step up from single-stage, and for most homes it delivers real comfort improvement. But it still cycles. It still produces distinct on and off moments. Low fire is still a fixed output, not a matched one.
The G97CMN adjusts continuously between 40% and 100% capacity. On a mild January afternoon when the home needs 55% output to hold temperature, it runs at 55% — not 40%, not 100%, not alternating between them. It holds the home steady without shutting off, without restarting, without the temperature drift that happens between cycles.
Three things you notice living with it:
The house stays at the number on the thermostat. Not averaging around it. Not swinging a degree above and a degree below. The set point becomes a genuine target rather than a midpoint the system orbits.
You stop hearing it. The variable-speed ECM blower starts slowly, finds its operating speed quietly, and ramps down before shutting off. During mild weather when the furnace runs at low output, the sound level in most homes drops below the ambient noise floor.
Winter air holds its moisture better. Short high-output heating cycles drive humidity out of indoor air. Sustained low-output cycles do not. Homeowners who upgrade from single-stage systems regularly notice their skin, throat, and wood floors react differently to winter — and trace it back to humidity retention they were not expecting.
At 97–98% AFUE, the G97CMN converts nearly every dollar of gas into usable heat. Here is what that means in actual annual savings rather than percentage points.
Upgrading from an 80% AFUE furnace: on a $2,000 annual gas bill where heating accounts for roughly 65% of consumption, the move to 97% saves approximately $220 to $370 per year depending on your gas rate and climate zone.
Upgrading from a 96% two-stage furnace like the Ion 96 G96CTN: the annual savings narrows to $40 to $80. That number is real but it is not the reason to choose the G97CMN over the G96CTN. The reason is comfort precision and quiet operation. The marginal efficiency gain is a secondary benefit, not the primary justification.
Ontario homeowners should verify current Enbridge Gas rebate eligibility at enbridgegas.com/rebates and check the Canada Greener Homes portal for active federal incentives. Available rebates can reduce the effective purchase cost meaningfully and shorten the payback period.
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Get Free QuotesRather than a feature list, here is what each component of the G97CMN means for the problem it solves.
Modulating Gas Valve (40–100% output range): The component that eliminates temperature drift rather than just reducing it. Every other furnace type — single-stage, two-stage — approximates your heating demand. The modulating valve matches it.
Variable-Speed ECM Blower: Runs at the speed the current output level requires, not the speed the motor defaults to. Lower electricity consumption than standard blower motors by 300 to 500 watts during sustained operation. More importantly for daily comfort: the house heats without announcing itself.
Ion™ System Control: One interface for temperature, humidity, ventilation, and air quality — accessible remotely via Wi-Fi. The diagnostic capability is worth noting specifically: your contractor can monitor system performance remotely and catch developing issues before they become service calls. That is a real long-term ownership benefit.
Secondary Heat Exchanger: The physical reason for the 97–98% AFUE rating. It captures heat from exhaust gases that lower-efficiency furnaces vent out of the home. Less wasted fuel per cycle, compounded across an entire Canadian heating season.
Lifetime Warranted Heat Exchanger: The most expensive single component in the furnace, covered for the life of the equipment. Not 20 years. Not until the next owner. The life of the furnace.
| Specification | Details |
|---|---|
| AFUE | 97–98% |
| Burner Type | Modulating (40–100%) |
| Blower Type | Variable-Speed ECM |
| BTU Output | 60,000–120,000 |
| ENERGY STAR® Certified | Yes |
| Heat Exchanger | Rigid Press-Joint Design |
| Ignition | Silicon Nitride Igniter |
| Venting | Two-Pipe PVC Direct Vent |
| Smart Control | Ion™ System Control Compatible |
| Dual-Fuel | Compatible with select heat pump systems |
Most buyers focus on price. These three questions protect the investment more than price shopping does.
1. Are you performing a Manual J load calculation?
Oversizing a modulating furnace is the most expensive installation mistake a contractor can make. A G97CMN sized too large for the home short-cycles at high output and never runs the sustained low-fire cycles that justify the purchase. If a contractor skips the Manual J, find one who does not.
2. Is the Ion™ System Control included in this quote?
The base furnace and the Ion thermostat are often priced separately. Confirm this in writing before comparing quotes across contractors — an apples-to-apples comparison requires the same scope on every estimate.
3. Will you register the warranty within 90 days of installation?
The 10-year parts warranty drops to 5 years if registration is missed. Some contractors handle this as part of their installation process. Others leave it to the homeowner. Confirm which applies and set a calendar reminder regardless.
As this KeepRite Ion 98 G97CMN Review explains, the payback calculation shifts depending on what you are replacing. Upgrading from a 15-year-old single-stage 80% furnace, the G97CMN pays back efficiently through both fuel savings and avoided repair costs.
Upgrading from a 5-year-old 96% two-stage furnace, the payback period stretches to 20 years or more on efficiency savings alone. Know which situation applies to you before the conversation with a contractor.
Modulating only works with proper sizing and airflow.
A G97CMN installed in a duct system that was designed for a single-speed furnace may not distribute air as evenly as expected.
If your existing ductwork has never been professionally assessed, that assessment is worth including in the installation scope — especially in older homes where duct sizing was never calculated precisely.
The Ion™ platform means choosing an ecosystem.
The Ion™ System Control is excellent within the KeepRite world. If you use Google Home, Apple HomeKit, or a competing smart thermostat platform extensively, confirm compatibility specifics before installation day rather than after.
Limited inventory is a real constraint, not a sales tactic.
The G97CMN's limited inventory status is manufacturer-designated. Some regions have stock readily available. Others do not. If a contractor tells you they cannot source the unit, the Ion 96 G96CTN and QuietComfort 97 G97VTN are the most comparable alternatives with standard availability.
G97CMN vs. Ion 96 G96CTN
The G96CTN is a two-stage variable-speed furnace at 96.7% AFUE — genuinely capable and well priced for most Canadian homes. The G97CMN modulates instead of switching between two fixed outputs, runs quieter during mild weather, and reaches 97–98% AFUE. The annual efficiency savings difference between them is $40 to $80.
The decision comes down to one honest question: is temperature precision and near-silent operation worth the price difference to
you specifically? For larger homes with real comfort complaints, yes. For homeowners whose current system already heats adequately, probably not.
G97CMN vs. QuietComfort 97 G97VTN
Both furnaces operate at the 97% AFUE tier with variable-speed blowers. The G97VTN has standard production availability. The G97CMN adds full Ion™ System Control integration and the 10-Year No Hassle Replacement™ warranty versus a shorter coverage period on the G97VTN.
If the Ion platform and extended warranty matter to you and inventory is confirmed, the G97CMN justifies the difference. If standard availability is the priority, the G97VTN is the cleaner path.
G97CMN vs. Performance 92 N92ESN
These two models represent opposite philosophies. The N92ESN heats reliably at 92% AFUE with a single-stage burner — straightforward, affordable, proven.
The G97CMN modulates continuously at near-maximum efficiency with full smart integration. The N92ESN makes sense for buyers where upfront cost governs the decision. The G97CMN makes sense for buyers where long-term comfort and operating cost govern it.
G97CMN vs. ProComfort Deluxe G9MAE
The G9MAE was the predecessor at this technology tier and has been discontinued. The G97CMN is its active successor with current production support and full warranty eligibility.
If a contractor is offering a G9MAE on remaining inventory at a meaningfully lower price with confirmed warranty registration, it remains a legitimate option. Otherwise, the G97CMN is the straightforward current choice.
For full technical documentation, visit the official KeepRite specifications.
As highlighted throughout this KeepRite Ion 98 G97CMN Review, registration is required within 90 days of installation by a licensed contractor. Missing the deadline cuts parts coverage in half. Confirm your contractor handles registration before they leave your home — and verify it was submitted.
A properly maintained G97CMN should deliver 18 to 22 years of reliable operation, which is one reason the KeepRite Ion 98 G97CMN Review positions this model as a long-term comfort investment. Modulating furnaces age more gently than single-stage systems because they spend the majority of their operating life at partial output — less thermal cycling, less mechanical stress, and less wear per hour of runtime.
The modulating valve and ECM blower motor respond best to consistent filter maintenance and annual professional servicing. The Ion™ System Control will surface diagnostic codes if performance starts drifting — those alerts are worth acting on early rather than waiting for a harder failure. Plan for $150 to $250 per year for a professional tune-up.
The KeepRite Ion 98 G97CMN Review shows why this furnace earns its position at the top of the lineup: it solves heating comfort problems completely rather than partially. Temperature consistency, quiet operation, humidity retention, and smart home integration — it delivers all of them at the highest level KeepRite currently offers in a residential gas furnace.
The honest caveat is that it only makes sense when the home is large enough, the heating problem real enough, and the ownership horizon long enough to justify the investment. For homeowners in that situation, no other furnace in KeepRite's current lineup comes closer.
Buy it if your home is mid-to-large, your current system genuinely underperforms, local inventory is confirmed, and you plan to own the home long enough for the comfort and efficiency upgrade to return its cost.
Look at the Ion 96 G96CTN instead if two-stage performance meets your needs, your home is smaller, or the price difference is the deciding factor.
Q1: Is the G97CMN still available in Canada?
It is listed as limited inventory by KeepRite. Regional availability varies — confirm with a licensed contractor in your area before deciding.
Q2: What is the real installed cost of the G97CMN?
Between $4,500 and $5,500 all-in, depending on BTU size, installation scope, and whether the Ion™ System Control is included in the quote.
Q3: How much quieter is modulating compared to two-stage?
Noticeably quieter during mild weather when the furnace runs at low output — which accounts for the majority of the Canadian heating season. The variable-speed blower ramps up from near-silence rather than starting at full speed.
Q4: Is the annual savings over a 96% furnace significant?
On a typical Canadian gas bill, the G97CMN saves approximately $40 to $80 more per year than a 96% two-stage furnace. That gap is real but the primary reason to choose modulating is comfort precision and quiet operation, not payback math.
Q5: What happens if I miss the 90-day warranty registration? Parts coverage drops from 10 years to 5 years. There are no exceptions. Register on installation day.
Q6: Does the G97CMN work with Google Nest or Ecobee? The Ion™ System Control is KeepRite's proprietary interface. Third-party thermostat compatibility has limits — confirm specifics with your contractor before installation if smart home integration matters to you.
Q7: What is the correct size G97CMN for my home? A Manual J load calculation by your contractor determines the right BTU for your specific home — square footage alone is not sufficient. Oversizing a modulating furnace eliminates the core benefit you are paying for.
Q8: What qualifies for rebates with this furnace? ENERGY STAR® certified furnaces at this efficiency tier have historically qualified for Enbridge Gas rebates and Canada Greener Homes incentives. Confirm current eligibility before installation.
