Typical costs for a 5 ton furnace plus installation fall in a broad range depending on efficiency, fuel type, and existing ductwork. Major cost drivers include unit efficiency (AFUE), installation complexity, and local labor rates. This guide provides price ranges in USD with per-unit details to help buyers estimate a project budget and compare options.
Assumptions: region, unit efficiency, existing ductwork, and installation complexity.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 5 Ton Furnace (Gas) | $2,500 | $3,800 | $6,000 | AFUE 80-96% depending on model |
| Installation & Labor | $1,200 | $2,200 | $3,800 | Vent adjustments, gas line, electrical, mounting |
| Permits & Inspections | $100 | $350 | $800 | Local requirements vary |
| Ductwork Modifications | $400 | $1,200 | $2,400 | Sizing, sealing, new registers |
| Thermostat & Controls | $150 | $350 | $700 | Smart thermostat adds cost |
| Delivery/Removal & Disposal | $50 | $250 | $500 | Old unit haul-away may add fees |
| Warranty & Miscellaneous | $100 | $350 | $900 | Labor warranties vary |
| Taxes & Overhead | $50 | $180 | $420 | Regional tax differences apply |
Overview Of Costs
Pricing reflects both the furnace unit and surrounding work. The total project typically ranges from about $4,400 to $13,000, with mid-range projects landing between $6,000 and $9,500. For a 5 ton unit, expect per-ton costs to average roughly $800-$1,400 for the furnace itself plus $1,000-$2,000 for installation labor, depending on complexity. Assuming standard ductwork and a direct venting setup.
The following snapshot shows total project ranges and per-unit estimates under common conditions. Low covers basic loading with minimal duct changes; High assumes extensive retrofits and higher-effort installation.
Cost Breakdown
The table below splits major cost categories with example ranges. The per-unit line items help compare furnace options by efficiency and features.
| Category | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $2,400 | $3,700 | $6,000 | Furnace core and heat exchanger |
| Labor | $1,200 | $2,200 | $3,800 | Removal of old unit, install, wiring, gas line work |
| Equipment | $0 | $300 | $700 | Auxiliary components, filters, dampers |
| Permits | $100 | $350 | $800 | Local jurisdiction fees |
| Delivery/Disposal | $50 | $250 | $500 | Haul-away and freight |
| Warranty | $100 | $350 | $900 | Limited coverage varies by manufacturer |
| Taxes | $50 | $180 | $420 | State and local taxes |
| Contingency | $0 | $200 | $600 | Unexpected duct or gas-line work |
Factors That Affect Price
Efficiency rating strongly shifts price. A 5 ton gas furnace with AFUE around 90% costs more upfront but saves on fuel, while basic 80% models are cheaper but less efficient. Additional drivers include ductwork length, return-air issues, and existing gas line capacity. Local codes and venting requirements can add installation complexity and cost. When a new furnace needs sophisticated zoning or a smart thermostat integration, pricing rises accordingly.
Regional Price Differences
Prices vary by region due to labor markets and supply chains. In urban Midwest markets, total project ranges often run higher than rural areas but similar in per-ton pricing. West Coast regions may show premium labor costs and permit fees, while the Southeast can offer lower installation charges but higher equipment shipping fees. Regionally, expect +/- 10-25% deltas on total project costs depending on local conditions.
Real-World Pricing Examples
Three scenario cards illustrate typical outcomes for a 5 ton furnace replacement with standard ductwork and a basic thermostat, plus variations in components and labor. Assumptions: single-family home, standard height ceilings, direct venting.
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Basic — 5 ton gas furnace, AFUE ~80%, manual thermostat, minimal ductwork changes. Labor 8 hours; per-hour rate $80-$120.
Assumptions: region, standard furnace size, and no major ductwork changes.
Estimated price: $4,400-$5,600. Breakdown: Furnace $2,300; Labor $1,800; Permits $150; Delivery $100; Tax $150; Contingency $0-$50.
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Mid-Range — 5 ton, AFUE 90-92%, programmable thermostat, minor duct sealing. Labor 14 hours; rate $95-$135.
Estimated price: $6,000-$8,000. Breakdown: Furnace $3,200; Labor $2,000; Permits $250; Ductwork $1,000; Delivery $150; Tax $250; Contingency $150.
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Premium — high-efficiency variable-speed blower, AFUE 95-98%, smart controls, extensive duct modifications if needed. Labor 18-22 hours; rate $110-$160.
Estimated price: $9,000-$13,000. Breakout: Furnace $4,500; Labor $3,500; Permits $400; Ductwork $2,000; Controls $500; Delivery $250; Tax $450; Contingency $600.
Ways To Save
Shop for high-efficiency models with favorable rebates and compare quotes from two to three contractors. Seasonal promotions or slow periods can yield discounts on installation labor. Consider bundling with a smart thermostat or UV air treatment to improve value, but verify long-term payoff. Ask about maintenance plans and free annual inspections to extend equipment life and reduce unexpected costs.
