How much does it cost to replace a furnace in 2025?

In Nassau County, furnace replacement costs range from $3,500 to $7,500 for most homes. Standard 80% efficiency furnaces start around $3,500, while high-efficiency 95%+ models typically cost $5,000-$7,500. Premium variable-speed systems can exceed $10,000.

Is it cheaper to repair or replace a furnace?

Generally, if repair costs exceed 50% of replacement cost and your furnace is over 15 years old, replacement is more cost-effective. A new high-efficiency furnace can also save 20-30% on heating costs, offsetting the investment over time.

How much does a new furnace and AC cost together?

A complete HVAC system replacement (furnace + AC) typically costs $8,000 to $15,000 in Nassau County. Bundling saves money compared to separate installations and ensures perfect compatibility between systems.

What is the cheapest furnace to install?

Electric furnaces have the lowest upfront cost ($2,000-$4,500) but higher operating costs. For gas homes, 80% AFUE furnaces are the cheapest option at $3,500-$5,000, though high-efficiency models often save more long-term.

Are there rebates for new furnaces?

Yes! High-efficiency furnaces (95%+ AFUE) may qualify for utility rebates, manufacturer incentives, and federal tax credits. We help you identify and apply for all available rebates to reduce your cost.

How long does furnace installation take?

Most 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.

How much does it cost to replace an oil furnace?

Oil furnace replacement costs $4,000-$8,000 in Nassau County, depending on efficiency and capacity. Converting from oil to gas costs an additional $1,500-$3,500 for the gas line installation but offers lower long-term fuel costs. We help you evaluate both options.

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Furnace Replacement Cost: 2025 Pricing Guide

Complete breakdown of new furnace costs including equipment, installation, and what affects your final price in Nassau County.

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Furnace Replacement Cost by Type

Standard Gas Furnace (80% AFUE): $3,500 - $5,000

Most affordable option. Uses natural gas with 80% efficiency. Good for budget-conscious homeowners. Lower upfront cost but higher operating costs than high-efficiency models.

High-Efficiency Gas Furnace (95%+ AFUE): $5,000 - $7,500

Most popular choice. Saves 15-20% on heating costs annually. Two-stage or modulating operation for better comfort. Qualifies for rebates and incentives.

Electric Furnace: $2,000 - $4,500

Lowest upfront cost. No gas line required. Higher operating costs in most areas. Best for homes without gas access or as supplemental heating.

Oil Furnace: $4,500 - $8,000

Higher upfront and operating costs. Requires oil tank. Common in older Nassau County homes. Consider converting to gas for long-term savings.

Premium Variable-Speed Furnace: $7,500 - $10,000+

Top-tier efficiency and comfort. Ultra-quiet operation. Best humidity control. Smart thermostat integration. Longest warranties available.

Furnace + AC Bundle: $8,000 - $15,000

Replace both heating and cooling together. Better compatibility and efficiency. Often more cost-effective than separate replacements. One installation, one warranty.

How Much Does a New Furnace Cost?

The average furnace replacement cost in Nassau County ranges from $3,500 to $7,500 for a complete installation, including equipment, labor, permits, and warranty. High-efficiency models and complex installations can reach $10,000 or more. This guide breaks down every cost factor so you know exactly what to expect—no surprises, no fees. Prices vary based on furnace type, efficiency rating, home size, and installation complexity. Brand quality also affects pricing—compare options in our Best Furnace Brands 2026 guide.

What's Included in Replacement Cost

New furnace unit (sized for your home)

Professional installation by certified technicians

Removal and disposal of old furnace

All required permits and inspections

Ductwork connections and modifications

Thermostat compatibility verification

Gas line connections (if applicable)

Electrical connections and safety testing

System startup and calibration

Manufacturer warranty registration

Workmanship warranty on installation

What Affects Furnace Replacement Cost

Furnace Size: Larger homes require larger furnaces. Proper sizing through Manual J calculations ensures optimal performance without overpaying

Efficiency Rating: Higher AFUE ratings cost more upfront but save 15-30% on annual heating costs

Installation Complexity: Ductwork modifications, gas line work, or electrical upgrades add to labor costs

Brand Selection: Premium brands like Carrier and Trane cost more but offer better warranties and reliability

Rebates & Incentives: High-efficiency models may qualify for utility rebates, tax credits, or manufacturer incentives

Permit Requirements: Nassau County requires permits for furnace installations—included in our pricing

Our Simple Process

From call to comfort in 6 easy steps

Free In-Home Consultation

We assess your home, measure heating needs, inspect ductwork, and discuss your comfort goals and budget.

Detailed Written Quote

You receive itemized pricing showing equipment cost, installation labor, permits, and total investment—no fees.

Equipment Selection

Choose from multiple options at different price points. We explain the pros and cons of each to help you decide.

Scheduling Installation

Pick a convenient date. Most installations complete in one day. We work around your schedule.

Professional Installation

Certified technicians install your new furnace following manufacturer specifications and local codes.

Testing & Walkthrough

We test every function, verify safety, and show you how to operate and maintain your new system.

Why Choose Home+ Air for Furnace Replacement

Transparent Pricing

Detailed quotes with no fees. The price we quote is the price you pay—guaranteed.

Proper Sizing

Manual J calculations ensure your furnace is correctly sized—not oversold based on commission.

Quality Installation

Certified technicians with manufacturer training. Installation quality affects efficiency and lifespan.

All Major Brands

We install Carrier, Trane, Lennox, Goodman, and more. We recommend what's best for you.

Financing Available

0% APR and low monthly payment options make high-efficiency furnaces affordable.

Warranty Protection

Manufacturer warranties plus our workmanship guarantee. We stand behind every installation.

Transparent Pricing

No fees. No surprises. Just honest service.

Budget-Friendly

$3,500 - $5,000

80% AFUE standard efficiency furnaces

80% AFUE efficiency rating
Single-stage heating
Standard installation included
10-year parts warranty
Permits and inspections
Best for tight budgets

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Best Value

$5,000 - $7,500

95%+ AFUE high-efficiency furnaces

95-98% AFUE efficiency
Two-stage heating
Quieter operation
15-20% annual savings
Extended warranty options
Most popular choice

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Premium

$7,500 - $10,000+

Variable-speed modulating furnaces

98% AFUE maximum efficiency
Variable-speed modulating
Ultra-quiet operation
Best comfort control
Smart home integration
Longest warranties

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

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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.

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