How long does a furnace last?

The average furnace lifespan is 15-20 years with proper maintenance. Gas furnaces typically last 15-20 years, oil furnaces 15-25 years, and electric furnaces 20-30 years. Factors affecting lifespan include maintenance frequency, usage patterns, installation quality, and climate. Signs your furnace is nearing end-of-life include frequent repairs, rising energy bills, uneven heating, and excessive noise.

How often should you replace your furnace?

Plan to replace your furnace every 15-20 years, or sooner if you notice: repair costs exceeding 50% of replacement value, energy bills increasing 20%+ year over year, frequent breakdowns (more than 2-3 per season), yellow burner flames, or a cracked heat exchanger. Regular maintenance can extend lifespan, but all furnaces eventually need replacement.

How long does furnace replacement take?

Most standard furnace replacements are completed in one day (4-8 hours). Complex installations requiring ductwork modifications or fuel conversions may take longer. We'll provide a timeline during your consultation.

Can I replace just the furnace or do I need a new AC too?

You can replace just the furnace if your AC is still in good condition. However, if both systems are aging, replacing them together is often more cost-effective and ensures compatibility. We'll advise based on your situation.

What efficiency should I choose?

For Nassau County's climate, we generally recommend 95%+ AFUE for most homes. The energy savings typically pay back the higher upfront cost within 5-7 years. 80% AFUE makes sense for vacation homes or extremely tight budgets.

Do I need new ductwork with a new furnace?

Not usually. We inspect your ductwork during consultation and make recommendations. Minor modifications or sealing may be needed, but complete duct replacement is rarely necessary with furnace replacement.

How much can I save with a new high-efficiency furnace?

Upgrading from an 80% AFUE furnace to a 95%+ unit typically saves 15-20% on heating costs—often $300-600 per year depending on your home size and usage. Two-stage and variable-speed models provide even better efficiency.

What warranty comes with a new furnace?

Most manufacturers offer 10-year parts warranties on registered furnaces, with some offering lifetime heat exchanger warranties. We also provide workmanship warranties on our installation. Extended warranties are available.

24/7 Emergency(516) 259-1191

ESEspañol

5.0(55 reviews)

Free in-home consultations

Furnace Replacement: Complete Guide

Is it time to replace your furnace? Learn when replacement makes sense, what it costs, and how to choose the right new furnace for your home.

Get Free Replacement Quote Call (516) 259-1191

Signs You Need Furnace Replacement

Furnace is 15-20+ Years Old

Even well-maintained furnaces lose efficiency and reliability after 15-20 years. Older furnaces also lack modern safety features and efficiency ratings.

Frequent Repairs

If you've repaired your furnace 2-3 times in recent years, replacement often makes more financial sense than continuing to invest in aging equipment.

Rising Energy Bills

Increasing heating costs despite similar usage indicates declining efficiency. New furnaces can be 20-40% more efficient than units from 15-20 years ago.

Uneven Heating or Cold Spots

Struggling to maintain consistent temperatures suggests your furnace can't keep up with demand—a sign of declining capacity or duct issues.

Yellow Burner Flame

A yellow or flickering flame indicates incomplete combustion and potential carbon monoxide production. This is a safety issue requiring immediate attention.

Cracked Heat Exchanger

A cracked heat exchanger is dangerous and cannot be repaired. This is a clear signal for immediate replacement—not negotiable for safety reasons.

Excessive Noise or Dust

Unusual noises, increased dust, or dry air problems suggest your furnace and ductwork system is deteriorating.

Repair Costs Exceed 50% of Replacement

When a single repair costs more than half what a new furnace would cost, replacement is usually the smarter financial decision.

When Should You Replace Your Furnace?

Most furnaces last 15-20 years with proper maintenance. As your furnace ages, it loses efficiency, requires more frequent repairs, and eventually becomes unreliable or unsafe. Replacing an aging furnace before it fails completely lets you plan the purchase, take advantage of rebates, and avoid emergency installation premiums. Modern high-efficiency furnaces can reduce your heating bills by 20-40% compared to older units, often paying for themselves in energy savings over time. Choosing a quality brand matters—see our Best Furnace Brands 2026 guide for top-rated manufacturers.

What's Included in Furnace Replacement

Removal and disposal of old furnace

Installation of new high-efficiency furnace

All necessary permits and inspections

Ductwork inspection and basic modifications

Gas line connection and leak testing

Electrical connections and wiring

Thermostat installation or upgrade

Complete system testing and calibration

Homeowner orientation and training

Manufacturer warranty registration

Post-installation follow-up

Benefits of Furnace Replacement

Lower Energy Bills: New furnaces are 20-40% more efficient, often saving $300-600+ per year on heating costs

Improved Comfort: Modern furnaces provide more consistent heating with fewer temperature swings

Better Air Quality: New systems include improved filtration and humidity control options

Increased Safety: Modern furnaces have advanced safety features including sealed combustion and redundant sensors

Reliable Heating: No more worrying about breakdowns or unexpected repair bills during cold weather

Warranty Protection: New furnaces include manufacturer warranties covering parts and heat exchangers for 10-20 years

Our Simple Process

From call to comfort in 8 easy steps

Free In-Home Consultation

We assess your current system, home size, ductwork, and heating needs. We discuss your budget and efficiency goals to recommend the best options.

Detailed Proposal

You receive a written proposal with furnace options at different price points, including efficiency ratings, features, warranties, and total installed cost.

Scheduling

Once you choose a furnace, we schedule installation at your convenience. Most replacements can be scheduled within a few days to a week.

Old Furnace Removal

On installation day, we safely disconnect and remove your old furnace. We handle proper disposal including refrigerant recovery if needed.

New Furnace Installation

We install your new furnace following manufacturer specifications and local codes. This includes all connections, venting, and electrical work.

Testing and Commissioning

We thoroughly test the system, verify proper operation, calibrate controls, and ensure everything is working safely and efficiently.

Homeowner Orientation

We show you how to operate your new furnace, change filters, program the thermostat, and maintain the system for optimal performance.

Warranty Registration

We register your warranty with the manufacturer and provide all documentation for your records.

Why Choose Home+ Air for Furnace Replacement

Proper Sizing

We perform Manual J calculations to ensure your new furnace is correctly sized—not too big, not too small—for optimal efficiency and comfort.

Quality Installation

Installation quality matters more than brand. Our certified technicians follow manufacturer specifications and local codes precisely.

All Major Brands

We install Carrier, Trane, Lennox, Goodman, and other top brands. We recommend what's best for you—not what's best for our margins.

Transparent Pricing

No games, no surprise fees. You get detailed pricing upfront showing equipment, labor, permits, and everything included.

Financing Available

We offer financing options including 0% APR plans to make high-efficiency furnaces affordable without compromising quality.

Warranty and Support

All installations include manufacturer warranties plus our workmanship guarantee. We're here for service and support long after installation.

Transparent Pricing

No fees. No surprises. Just honest service.

Standard Efficiency

$3,500 - $5,000

80% AFUE furnaces—reliable heating at lower upfront cost

80% AFUE efficiency rating
Single-stage heating
Standard installation included
Permits and inspections
10-year parts warranty
Reliable heating at lowest cost

Get Free Quote

High Efficiency

$5,000 - $7,500

95%+ AFUE furnaces—optimal efficiency and comfort

95-98% AFUE efficiency
Two-stage or modulating heat
Quieter operation
Better humidity control
10-20 year warranty options
Significant energy savings

Get Free Quote

Premium Systems

$7,500 - $10,000+

Top-tier variable-speed furnaces with smart features

98% AFUE efficiency
Variable-speed modulating
Ultra-quiet operation
Smart thermostat integration
Best humidity and comfort
Longest warranties available

Get Free Quote

Prices are estimates for typical installations. Additional costs may apply for ductwork modifications, gas line work, or complex installations. Free in-home consultations provide exact pricing for your situation.

Instant Quote Available

Get Your Furnace Replacement: Complete Guide Instant Quote

See instant pricing in 30 seconds. No commitment required. Schedule your free home visit today.

Instant pricing for 3 system tiers

Available rebates & incentives

Energy savings estimate

Easy scheduling for free home visit

Licensed & Insured

Price Match Guarantee

No Fees

30-Second Quote

Flexible Financing Available

Don't let budget concerns delay your comfort. We offer flexible financing options through Synchrony Bank to make upgrading your system affordable with low monthly payments.

Quick approval

0% interest options

Flexible terms

View All Options