Furnace size and efficiency
Equipment capacity, AFUE rating, staging, and blower type have the largest effect on the installed price.
High-Efficiency 95%+ AFUE
Furnace Installation in Nassau County, NY
Professional new furnace installation for reliable winter heating, lower energy bills, and long-term comfort.
Replacing your AC system too?
Qualifying complete-system installations include a standard-efficiency furnace through October 31, 2026.
2026 Nassau County planning range
What Does Furnace Installation Cost?
A straightforward replacement commonly falls between $4,800 and $10,000+. Your exact price depends on the equipment and the work required to install it safely—not a one-size-fits-all online number.
Every estimate should show:
Exact model numbers, installation scope, permit responsibility, warranty terms, and total price.
Venting and condensate
High-efficiency furnaces may require new PVC venting, condensate drainage, and changes to the existing flue.
Ductwork and airflow
Plenum transitions, return-air corrections, zoning, or undersized ducts can change the installation scope.
Permits and code work
The written proposal identifies required permits, inspections, gas or electrical corrections, and disposal.
High Efficiency 95%+ AFUE
Top Recommended Furnaces
Our most popular high-efficiency installations—delivering maximum comfort and energy savings for Nassau County homes.
95% AFUE Efficiency
99% AFUE Efficiency
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95% AFUE Efficiency
Top Rated
Featured Furnace Brands We Install
Factory-trained technicians for all major manufacturers. Expert installation with manufacturer warranty registration.
Instant Quote Available
Get Your Furnace Installation Quote in 30 Seconds
Just answer a few questions, see your instant quote, and schedule your free home visit. No commitment required.
Instant pricing for 3 system tiers
Available rebates & incentives
Energy savings estimate
Easy scheduling for free home visit
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Price Match Guarantee
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30-Second Quote
Expert Furnace Installation You Can Trust
A properly installed furnace delivers reliable heat, lower energy bills, and years of trouble-free operation. Our certified technicians handle every aspect of your furnace installation—from system sizing and ductwork evaluation to final testing and warranty registration. Serving all of Nassau County with same-day estimates and flexible financing options.
What's Included in Our Furnace Installation
Free in-home consultation and estimate
Complete heating load calculation
Removal and disposal of old furnace
New furnace installation to code
Gas line inspection and connection
Electrical wiring and connections
Thermostat installation and setup
Ductwork evaluation and sealing
Airflow balancing and testing
Safety inspection and CO testing
System startup and calibration
Manufacturer warranty registration
Signs You Need a New Furnace
Furnace is 15-20+ years old
Aging furnaces lose efficiency and require frequent, costly repairs.
Rising energy bills
Older, inefficient furnaces drive up heating costs significantly each winter.
Frequent breakdowns
Multiple repairs per season indicate it's more cost-effective to replace.
Uneven heating throughout home
Some rooms too hot, others too cold—system can no longer distribute heat properly.
Yellow pilot light
A yellow flame can indicate carbon monoxide concerns requiring immediate replacement.
Strange noises
Loud banging, rattling, or screeching indicates serious internal wear.
Current Offers
Deals & Savings
REPAIR SAVINGS
$100 OFF
Furnace or Boiler Repair
Save $100 on any furnace or boiler repair service. Diagnostic fee credited toward repair.
Always Available
Our Professional Furnace Installation Process
Our Simple Process
From call to comfort in 5 easy steps
1
Free In-Home Assessment
We evaluate your home's heating needs, ductwork, and existing system to recommend the right furnace size and efficiency level.
2
Detailed Quote & System Selection
We provide transparent pricing for multiple furnace options so you can choose what fits your budget and needs.
3
Safe Removal of Old Furnace
We disconnect and remove your old equipment safely, including proper disposal.
4
Professional Installation
Our certified technicians install your new furnace to manufacturer specifications and local codes, including all permits.
5
Testing & Commissioning
We thoroughly test your new system, balance airflow, and ensure optimal performance before leaving.
Why Choose Home+ Air for Furnace Installation
Certified Installation Experts
Our technicians are factory-trained and certified on all major furnace brands including Carrier, Lennox, and Trane.
Upfront, Honest Pricing
No fees or surprise charges—you know the complete cost before we start.
High-Efficiency Options
We specialize in modulating furnaces that deliver up to 98%+ AFUE efficiency ratings.
Comprehensive Warranties
All installations include strong manufacturer and workmanship warranties for peace of mind.
Repair or Replace?
We'll help you make the right decision for your home and budget
Repair Your Furnace
- Furnace is less than 10 years old
- Only one component has failed
- Repair cost is under $800
- System still heats efficiently
- Heat exchanger is not cracked
Replace Your Furnace
- Furnace is 15+ years old
- Multiple components failing
- Repair cost exceeds $1,500
- Energy bills keep rising
- Frequent breakdowns each season
- Heat exchanger is cracked
Already have a furnace that needs service?
View Furnace Repair Services →Flexible Financing Available
Financing options are available through Synchrony Bank, subject to credit approval and the lender's current terms. Review the full offer before applying.
Online application
Terms shown before acceptance
Subject to credit approval
5.0 / 5 · 74 Google reviews
Recent Google reviews
Long Island feedback.
Real customers.
Recent public reviews from homeowners who hired Home+ Air & Heat.
NA
Nawina Adhikari
Long Island, NY · May 2026
“Homets Air and Heat did an amazing job with our AC service. From the beginning, they were very professional, responsive, and easy to work with.”
AC Service
Google review
PP
Preya Patel
Long Island, NY · May 2026
“Very good and fast service, prices very reasonable as well.”
HVAC Service
Google review
AS
Asifa Saliman
Long Island, NY · Apr 2026
“Quincy was my technician. He figured my issue in 10 minutes. He was very knowledgeable. He gave me a solution and the service was great.”
HVAC Diagnostic
Google review
NG
Nathan Gonzalez
Long Island, NY · Apr 2026
“Great service, thank you.”
HVAC Service
Google review
US
Uddipon Sarker
Long Island, NY · Jan 2026
“Amazing service. Really efficient with their work. Plus reasonably priced for the service.”
HVAC Service
Google review
BM
Bipul Mainali
Long Island, NY · Jan 2026
“They replaced my old, oxidized copper pipes connected to the boiler. The work was completed neatly, and the price was fair.”
Boiler Repair
Google review
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Currently 5 stars with 74 reviews
Furnace Installation Throughout Nassau County
Furnace Installation Across Nassau County
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Frequently Asked Questions
Frequently Asked Questions
Get answers to common questions about our services
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