Cost Guide
Gas Furnace Replacement Cost in New Jersey
Replacing a gas furnace in Union County runs $3,500 to $15,000 installed, based on the ranges Vanguard's Instant Estimator quotes. The efficiency tier you choose and the heating capacity your home needs set most of the price. A standard 80% AFUE furnace in a smaller home sits at the low end; a modulating furnace in a large home sits at the top.
Typical price ranges
Good
$3,500 to $8,500
Standard-efficiency 80% AFUE furnace with a single-stage burner. $3,500 to $5,500 in homes under 1,800 sq ft, up to $5,800 to $8,500 in homes over 3,500 sq ft. The Instant Estimator quotes mid-size homes between those figures; the final price is confirmed in writing on site before work starts.
Better
$5,500 to $12,000
High-efficiency 92-96% AFUE furnace with a two-stage burner and a variable-speed blower. $5,500 to $8,000 in homes under 1,800 sq ft, up to $8,000 to $12,000 over 3,500 sq ft. Homes in between get Instant Estimator figures inside this span; the final price is confirmed in writing on site before any work begins.
Best
$7,500 to $15,000
Premium modulating furnace rated 97-98% AFUE with an ECM variable-speed blower. $7,500 to $10,500 in homes under 1,800 sq ft, up to $11,000 to $15,000 over 3,500 sq ft. Every home size's Instant Estimator figure sits within this span; the final price is confirmed in writing on site before the job begins.
What drives the price
- Efficiency tier
- In a home under 1,800 sq ft, the estimator quotes $3,500 to $5,500 for an 80% AFUE furnace and $5,500 to $8,000 for a 92-96% AFUE model. Over 3,500 sq ft the figures are $5,800 to $8,500 and $8,000 to $12,000. A higher-efficiency furnace turns more of the gas it burns into heat, so part of that difference comes back on gas bills over the furnace's life.
- Heating capacity
- Bigger homes need more output, which is why every tier climbs with square footage. The right size comes from a heat-loss calculation rather than square footage alone; an oversized furnace cycles on and off often and heats unevenly.
- Venting
- An 80% furnace vents up a chimney or metal flue. A 90%-plus condensing furnace vents through PVC pipe and needs a condensate drain. Switching can leave a gas water heater alone on the old chimney, and that chimney may then need a liner.
- Ductwork
- A new furnace can use the existing ducts when they are sized and sealed properly. Undersized or leaky ducts limit what any furnace can deliver and can add work to the job.
- Permits and inspection
- Vanguard handles permits and inspections where required. You see the full price in writing before work starts, with no hidden fees added afterward.
Repair or replace your furnace?
Furnace repairs run $150 to $5,500 in the estimator, and a major repair can cost as much as a new Good-tier furnace, which starts at $3,500 in a home under 1,800 sq ft.
A cracked heat exchanger is a safety problem because it can let combustion gases, including carbon monoxide, into the air stream. On an older furnace, that finding usually points to replacement.
Which tier makes sense?
Good suits a smaller home, a tight budget or a house you plan to sell soon. Better adds a two-stage burner and a variable-speed blower, which run at low output most of the time for steadier temperatures and quieter operation.
Best adds a modulating burner that adjusts its output in small steps for the most even heat and the highest efficiency. The longer you plan to stay and the more you heat, the more the higher tiers pay back.
Get a tailored estimate
See Good, Better, and Best options priced for your home in about a minute, with no phone call required.
Frequently Asked Questions
How much does a new gas furnace cost in NJ?
Vanguard's Instant Estimator quotes $3,500 to $8,500 for a standard 80% AFUE furnace, $5,500 to $12,000 for a 92-96% AFUE model and $7,500 to $15,000 for a modulating 97-98% AFUE furnace, depending on home size.
How much more does a high-efficiency furnace cost?
The gap is the difference between the Good and Better price cards above. In return, the higher-efficiency furnace burns less gas for the same amount of heat.
Do these prices cover oil or electric furnaces?
No. The ranges on this page are for gas furnaces. For an oil or electric furnace, call 908-577-5579; you get a written price before any work starts.
Can I finance a new furnace?
Yes. Financing is available for larger projects such as a furnace replacement. Ask about it when you call 908-577-5579 or when you receive your written price.