Carrier Infinity Furnace Reviews: Performance, Features, and Buying Guide

The Carrier Infinity furnace line is known for high efficiency, quiet operation, and advanced controls. This review covers model differences, performance metrics, installation considerations, costs, warranties, common problems, and buying tips to help readers compare Carrier Infinity furnaces and decide if they fit their home heating needs.

Model	AFUE	Blower	Gas Valve	Typical Price Range
Infinity 98	Up To 98.5%	Variable-Speed	Modulating	$3,500–$6,500 Installed
Infinity 96	Up To 96%	Variable/Multispeed	Two-Stage/Modulating	$3,000–$5,500 Installed
Infinity 95	Up To 95%	Multispeed	Two-Stage	$2,800–$5,000 Installed

What The Carrier Infinity Furnace Line Offers

The Carrier Infinity series emphasizes high AFUE ratings, variable-speed blowers, and advanced control integration. These furnaces aim to deliver steady temperatures, improved indoor air quality, and energy savings when matched with a compatible thermostat and proper ductwork.

Key Features And Technologies

Variable-Speed Blowers

Most Infinity models include a variable-speed blower motor that runs at low RPM for long periods and ramps up when needed. This creates quieter operation, more even heating, and better humidity control compared to single-speed blowers.

Modulating And Two-Stage Gas Valves

The Infinity 98 uses a modulating gas valve to change heat output incrementally for precise temperature control. Other Infinity models use two-stage or staged modulation to balance efficiency and cost.

Smart Thermostat And System Integration

Carrier’s Infinity furnaces integrate with the Infinity Touch or compatible smart thermostats to enable zoning, adaptive settings, remote access, and system diagnostics. Integration improves efficiency and user control.

Air Quality And Comfort Options

Carrier offers matched accessories—advanced filters, humidifiers, UV lights, and zoning dampers—which expand the furnace’s impact on air quality and comfort. Matched systems perform best.

Performance Metrics: Efficiency, Noise, And Comfort

AFUE is the standard efficiency metric for gas furnaces. Infinity models reach up to 98.5% AFUE, which means minimal heat loss and lower gas bills for colder climates. Efficiency gains depend on installation quality and thermostat strategy.

Noise levels are typically lower in Infinity models due to variable-speed blowers and sound-dampening designs. Expect noticeably quieter operation than mid-tier furnaces, particularly at steady-state low speeds.

Comfort improves with variable or modulating heat delivery because these furnaces reduce temperature swings. Homes with proper ductwork and insulation will see the greatest benefits in consistent indoor temperatures.

Comparing Infinity Models

Infinity 98 is the flagship model with the highest AFUE and full modulation; it targets homeowners seeking maximum efficiency and precise comfort control. Infinity 96 and 95 offer high efficiency at lower purchase prices but may use less nuanced staging.

Key comparison points: AFUE percentages, blower type, modulation capability, and price. Select the model that balances upfront cost with projected energy savings and comfort needs.

Installation And Sizing Considerations

Proper sizing is critical. HVAC contractors should perform a Manual J load calculation to determine correct furnace capacity. Oversized units cycle frequently, reducing efficiency and comfort, while undersized units may not meet heating demands.

Installation quality impacts long-term performance. Duct sealing, correct venting, gas line sizing, and electrical connections all affect efficiency and reliability. Choose an experienced Carrier dealer or certified installer for best results.

Costs, Rebates, And Long-Term Value

Installed prices vary by model, home size, complexity of installation, and region. Average installed costs for Infinity furnaces typically range from $2,800 to $6,500. Higher-efficiency models cost more upfront but may yield energy savings in colder climates.

Utility rebates and federal tax incentives sometimes apply to high-efficiency systems. Check local utility programs and the Database of State Incentives for Renewables & Efficiency (DSIRE) to identify available rebates and credits.

Warranties And Reliability

Carrier offers limited warranties on heat exchangers and parts; extended warranties often require product registration and installation by a certified dealer. Typical coverage includes a 10-year limited parts warranty with possible lifetime heat exchanger warranties on qualifying models.

Reliability depends on maintenance and installation quality. Regular annual tune-ups and filter changes extend service life and reduce the likelihood of premature failures.

Common Problems And Troubleshooting

• Failure To Heat: Could indicate thermostat issues, gas supply problems, or ignition failures. Check error codes on the furnace control board.
• Short Cycling: Often caused by improper sizing, dirty air filters, or airflow restrictions in the ducts.
• Unusual Noises: Rattling may mean loose panels; whistling can signal duct leaks or airflow restrictions.
• High Energy Bills: Confirm proper thermostat settings, check for duct leaks, and ensure the furnace is the correct size for the home.

Maintenance Checklist

• Change filters every 1–3 months depending on filter type and household conditions.
• Schedule an annual professional inspection before the heating season to clean burners, check heat exchanger integrity, and test controls.
• Keep vents and returns unobstructed and maintain clearances around the furnace for airflow.
• Record service visits and any error codes shown on the furnace’s diagnostic panel.

How Carrier Infinity Compares To Competitors

Compared with competitor high-efficiency furnaces (e.g., Trane, Lennox, Rheem), Carrier Infinity models are competitive on efficiency and offer strong integration with smart thermostats. Carrier’s support network and dealer presence are advantages in many U.S. markets.

Some competing brands may offer slightly higher AFUE or lower price points on comparable units. Buyers should compare warranties, local dealer workmanship, and long-term service availability.

Buying Tips And Questions To Ask Dealers

• Ask for a Manual J load calculation and written sizing rationale for the recommended model.
• Request itemized quotes including equipment, labor, permits, and any necessary ductwork modifications.
• Confirm warranty registration requirements and whether the installer provides a workmanship warranty.
• Inquire about tune-up plans, emergency service availability, and response times.

Energy Savings Example

A home replacing a 78% AFUE furnace with a Carrier Infinity 98 at 98.5% AFUE could see substantial gas savings, especially in cold climates. Actual savings depend on local gas prices, usage patterns, and installation quality.

Frequently Asked Questions

Is A Carrier Infinity Furnace Worth The Extra Cost?

For homeowners prioritizing quiet operation, tight temperature control, and top-tier efficiency, the Infinity line can be worth the premium. The payback period varies by climate and energy costs.

How Long Do Infinity Furnaces Last?

With proper maintenance, Carrier furnaces typically last 15–20 years. Annual servicing and timely repairs improve longevity.

Can An Infinity Furnace Improve Indoor Air Quality?

Yes. When paired with high-efficiency filters, UV lights, and humidifiers in a matched system, an Infinity furnace supports improved indoor air quality and humidity control.

Are There Size Options For Different Home Sizes?

Carrier offers several capacity options within the Infinity line. Accurate sizing through Manual J ensures the correct capacity for a given home.

Final Buying Checklist

1. Obtain multiple written quotes from certified Carrier dealers.
2. Verify Manual J load calculations and proposed ductwork solutions.
3. Confirm warranty terms and registration procedures.
4. Ask about available rebates, tax credits, and financing options.
5. Schedule a pre-season inspection and request maintenance plan options.

Readers considering a Carrier Infinity furnace should weigh initial costs against long-term efficiency, local climate, and installation quality. Comparing models, verifying sizing, and selecting a reputable installer will maximize performance and satisfaction.