Homeowners typically pay a broad range for a new gas furnace and central air conditioning system, driven by unit efficiency, ductwork, and installation complexity. The cost often hinges on furnace AFUE, AC SEER rating, labor time, and whether upgrades like smart thermostats or improved filtration are added. This guide presents cost ranges in USD to help form a clear budget.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Furnace Unit | $1,800 | $3,000 | $5,000 | Gas furnace with 80–97% AFUE; includes basic installation. |
| AC Condenser | $2,500 | $4,500 | $7,500 | Outdoor unit for central cooling; 1.5–5 ton typical range. |
| Heat Exchange/Plenum Work | $400 | $1,200 | $2,400 | Includes duct modifications if needed. |
| Labor & Installation | $1,200 | $2,500 | $4,500 | Permits may apply; varies by home size. |
| Permits & Codes | $60 | $400 | $1,200 | State and local requirements. |
| Delivery/Disposal | $100 | $350 | $900 | Old equipment removal and new unit delivery. |
| Warranties & Accessories | $150 | $500 | $1,000 | Extended warranty, filters, and basic thermostats. |
| Taxes & Overhead | $150 | $450 | $900 | Regional taxes and contractor margins. |
| Contingency | $100 | $500 | $1,200 | Unforeseen ductwork or gas line work. |
Overview Of Costs
Cost ranges reflect typical residential new furnace and AC installs in the United States, including installation labor and common add-ons. The total project often falls between $6,000 and $14,000, with variations by region, efficiency, and system type. A basic, entry-level setup may hover around $6,000–$9,000, while high-efficiency, multi-zone or high-SEER systems can exceed $12,000–$18,000 when extensive ductwork or upgrades are required. Per-unit pricing commonly appears as $2,000–$4,000 for the furnace and $3,000–$6,500 for the outdoor condenser, with labor typically $1,200–$3,000 or more depending on conditions.
Cost Breakdown
| Category | Materials | Labor | Equipment | Permits | Delivery/Disposal | Taxes |
|---|---|---|---|---|---|---|
| Furnace | $1,600–$3,000 | $800–$1,800 | $200–$1,000 | $0–$150 | $0 | $60–$120 |
| Air Conditioner | $2,200–$4,500 | $900–$1,800 | $600–$1,200 | $60–$400 | $0–$150 | $40–$120 |
| System Add-Ons | $100–$800 | $0–$400 | $100–$400 | $0–$120 | $0–$200 | $0–$60 |
| Installation & Misc | — | $600–$1,400 | — | $0–$60 | $0–$100 | $0–$40 |
| Subtotal | — | — | — | — | — | — |
Factors That Affect Price
Efficiency targets and climate zone are major price levers for gas furnace and AC installs. Higher furnace AFUE (90–97% vs. 80–85%) adds upfront cost but lowers annual energy use. AC units with higher SEER ratings deliver energy savings but require a larger initial investment. Ductwork condition, existing gas line capacity, and the need for gas line relocation or vent modifications can dramatically shift totals. Homes with compact layouts or multi-zone setups may incur additional labor and materials costs.
Ways To Save
Planning and shopping around can reduce costs by thousands of dollars. Obtain at least three written bids and verify inclusions such as new gas shutoff valves, refrigerant charges, and thermostat compatibility. Consider off-season installation windows in spring or fall when demand drops and contractor availability improves. Replacing furnace and AC as a matched pair often yields savings on labor and system efficiency. If existing ductwork is in good shape, upgrading only the indoor unit or thermostat may be a cost-effective intermediate option.
Regional Price Differences
- West Coast: Higher equipment costs and labor rates can push totals toward the upper end of the range, especially for premium SEER systems.
- Midwest: Moderate prices with good value when ductwork is preexisting; seasonal demand can create temporary price spikes in winter.
- South: Gas furnace and AC installs may be affected by humidity-related corrosion considerations and permit variance, with a wider spread for mid-range systems.
Labor & Installation Time
Average project duration spans 1–3 days depending on existing ductwork and gas line work. Common bottlenecks include refrigerant recharge wiring, thermostat integration, and any required gas line upgrades. If duct sealing or insulation is added, expect longer installation windows and modestly higher pricing. Scheduling around utilities’ inspection timelines can also affect total project length and price.
Additional & Hidden Costs
- Extended ductwork or custom plenums
- Replacements of gas supply lines or seismically rated mounts
- Smart thermostat upgrades or Wi-Fi integrators
- Indoor air quality improvements like higher MERV filters or humidifiers
Assumptions: region, specs, labor hours.
Real-World Pricing Examples
Scenario A – Basic: 80% AFUE furnace with 14 SEER AC, standard ductwork, suburban home. Specs: 2.0–2.5 ton AC, minimal add-ons. Labor hours: 12–18. Total: $6,500–$8,500. Per-unit: furnace $1,800–$2,800; condenser $2,800–$4,000.
Scenario B – Mid-Range: 95% AFUE furnace with 16 SEER AC, moderate ductwork improvements, single-zone to multi-zone potential. Labor hours: 16–28. Total: $9,500–$13,500. Per-unit: furnace $2,800–$4,000; condenser $3,600–$5,600.
Scenario C – Premium: 97% AFUE furnace with 18+ SEER AC, full duct rehab, smart controls, and enhanced filtration. Labor hours: 24–40. Total: $14,000–$22,000. Per-unit: furnace $3,800–$5,000; condenser $5,000–$7,500.
Assumptions: region, specs, labor hours.