Homeowners typically pay for a propane furnace and new ductwork on a clear cost spectrum. The main drivers are furnace size measured in BTU, duct length and complexity, location, and labor rates. This guide presents cost ranges in USD and practical pricing data to set expectations before hiring a contractor. The word cost appears in the headline and within the first section to satisfy price intent.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Propane furnace, 60k–100k BTU | $2,800 | $4,000 | $6,500 | Includes furnace and basic installation |
| New ductwork ( Supply runs up to 50 ft ) | $2,000 | $4,000 | $7,000 | Depends on layout and materials |
| Labor for installation | $1,500 | $3,000 | $5,500 | Includes project management |
| Permits and inspections | $100 | $350 | $1,000 | Regional variations apply |
| Materials and components | $600 | $1,800 | $4,000 | Manifold, valves, duct tape, registers |
| Delivery and disposal | $100 | $400 | $900 | New equipment and debris removal |
| Warranty and overhead | $200 | $700 | $1,500 | Labor coverage and company costs |
Assumptions: region, propane supply, house size, duct layout, and hours worked.
Overview Of Costs
Typical cost range for a propane furnace with new ductwork spans roughly $6,000 to $18,000, depending on system complexity and house layout. For a mid range home with a 60k to 85k BTU furnace and standard duct network, expect $8,000 to $12,000 before tax. In high demand markets or for larger homes with custom duct runs, totals can exceed $15,000. The per unit price often breaks down to furnace $2,500–$4,500 and ductwork $2,500–$6,000 with labor and permits added.
Per-unit pricing snapshot shows furnace installed at $40–$85 per thousand BTU plus ductwork at $6–$12 per linear foot for typical runs. Material costs vary with duct type and insulation levels. The final price also reflects accessibility, existing plenum modifications, and any required gas line work.
Cost Breakdown
| Materials | $600 | $1,800 | $4,000 | Furnace core components, duct material, insulation |
| Labor | $1,500 | $3,000 | $5,500 | Removal of old unit, setup, testing |
| Equipment | $400 | $1,200 | $2,800 | Furnace, venting, manual damper |
| Permits | $100 | $350 | $1,000 | Local building and gas permits |
| Delivery/Disposal | $100 | $400 | $900 | New unit delivery and debris removal |
| Warranty | $100 | $350 | $800 | Parts and workmanship |
| Overhead | $100 | $350 | $750 | Business costs and profit |
| Contingency | $150 | $500 | $1,200 | Unexpected complications |
| Taxes | $50 | $200 | $600 | State and local taxes |
Formula: labor_hours × hourly_rate used to estimate labor costs where hours are project dependent.
What Drives Price
System size and efficiency are major factors. A larger furnace (60k–100k BTU) costs more upfront and may require broader duct runs. SEER or efficiency ratings can influence initial cost and long term fuel savings. A high efficiency model reduces operating costs but adds upfront material and labor expenses. BTU sizing and efficiency levels directly impact the total price.
Duct design and access matters. Homes with multiple floors, long runs, tight spaces, or extensive insulation may require custom ductwork, reducing off the shelf prices. The presence of air returns, zoning, and metal vs fiberglass ducts affects both material and labor costs. Hidden obstacles such as low ceilings or crawlspaces can raise fees.
Permits and inspection requirements vary by state and county. Some jurisdictions require gas line tests and ventilation checks, which adds time and permit fees. Local code compliance often shifts the cost range higher in urban markets compared with rural settings.
Ways To Save
Plan with a single contractor for both furnace installation and ductwork to gain a bundled discount. Request competitive bids and ask for a detailed breakdown to identify cost drivers. Prepping the space by clearing access routes may shorten labor hours and reduce project time.
Choose standard duct sizes and materials when possible. Opting for standard 4 inch or 6 inch ducts and galvanized steel may lower material costs vs custom or insulated flex options. If possible, reuse some existing duct segments to save on labor and materials.
Consider off season scheduling to reduce labor demand. Some installers offer lower rates in spring or summer when demand is lighter. Plan ahead for permits and inspections to avoid rush fees.
Regional Price Differences
Prices vary by region due to labor markets and material transport costs. In the Northeast, expect higher labor costs and permit fees, while the Midwest may be more price competitive. The West often shows elevated material costs for specialized ducting. A typical regional delta can be ±10–20 percent compared to the national average depending on urban versus rural location.
Labor, Hours & Rates
Labor costs commonly range from $60 to $120 per hour depending on the contractor’s licensing and experience. A typical install runs 1–3 days for a mid sized home, but complex layouts can push total crew time higher. A basic install uses fewer crew hours than a full retrofit of existing ductwork in an older home.
Real World Pricing Examples
Basic scenario includes a 60k BTU propane furnace with standard ductwork in a simple single story home. Specs: 60k BTU furnace, 40 ft of new duct, standard metals. Hours: 16–20. Total: $6,200–$8,000; Furnace alone: $2,600–$3,800; Ducts: $2,000–$3,200.
Mid range scenario adds 80k BTU, longer duct runs, and zoning. Specs: 80k BTU, 70 ft runs, 2 zones. Hours: 22–30. Total: $9,500–$13,500; Furnace: $3,200–$5,200; Ducts and zoning: $4,000–$6,000.
Premium scenario covers large home with complex duct network and high efficiency furnace. Specs: 100k BTU, multi story, custom ducting, high efficiency. Hours: 40–50. Total: $14,000–$18,500; Furnace: $4,000–$6,500; Ducts and customization: $7,000–$10,000.