Installing a propane furnace and new ductwork typically costs $8,000-$22,000, with many standard projects near $14,000. The final price depends on furnace capacity and efficiency, how much ductwork is needed, labor rates, and whether the home requires propane storage or code upgrades.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Furnace and ductwork project | $8,000 | $14,000 | $22,000 | Typical full installation |
| Propane furnace | $2,500 | $4,500 | $8,000 | Equipment and standard installation |
| New ductwork | $3,000 | $6,500 | $12,000 | Whole-home system; access affects price |
| Propane tank and connection | $500 | $1,500 | $3,500 | Tank purchase, rental, or line work varies |
Typical Prices for a Whole-Home Propane Furnace
A complete installation in an existing 1,500-2,000-square-foot home commonly falls between $10,000 and $18,000. A smaller home with usable ducts may come in below that range, while a larger house needing ducts throughout multiple floors can reach $22,000 or more.
Budget about $14,000 for a midrange furnace, new standard ductwork, and ordinary installation conditions. Equipment prices often reflect a 60,000-100,000 BTU furnace with roughly 80%-96% AFUE efficiency. Geographic labor rates, venting requirements, and whether the job includes a new tank all change the estimate.
Assumptions: Existing home, standard-access installation, midrange equipment, and typical U.S. contractor pricing; local quotes may differ.
What Furnace, Duct, and Labor Charges Include
Quotes can bundle equipment, installation, and duct fabrication differently. The table separates common budget categories; ranges overlap because contractors may include some work in a package price.
| Cost component | Typical range | Common pricing basis | What changes the charge |
|---|---|---|---|
| Furnace equipment | $1,500-$5,500 | $25-$55 per 1,000 BTU of capacity | Capacity, AFUE, and brand tier |
| Furnace installation labor | $1,200-$3,500 | $75-$150 per hour | Venting, gas piping, and access |
| Duct materials and fabrication | $2,000-$7,000 | $15-$35 per linear foot installed | Metal versus flex duct and layout |
| Duct installation labor | $1,500-$5,000 | $75-$150 per hour | Attic, crawlspace, or finished walls |
| Permits, tank, and disposal | $300-$3,500 | Project-specific fees | Local rules and tank arrangement |
Labor and duct access often account for as much of the bill as the furnace itself. A labor estimate can be checked with ; ask the contractor to identify expected crew hours and which tasks are included.
How BTUs, AFUE, and Duct Length Shift the Quote
Furnace sizing is based on a load calculation, not just square footage. A 60,000-BTU unit may suit a compact, well-insulated home, while a larger or leakier house may need 100,000 BTUs or more. Oversizing can raise equipment and operating costs without improving comfort.
Efficiency also matters: an 80% AFUE model usually costs less upfront than a 95%-96% model, but the higher-efficiency unit may need different venting and condensate drainage. New ductwork commonly runs $15-$35 per linear foot installed. A 200-foot layout may therefore cost $3,000-$7,000 before difficult access or extensive returns.
Every extra 50 linear feet of duct can add roughly $750-$1,750, before unusual framing or finish repairs. Sealed, insulated ducts and correctly sized returns help avoid wasted heating capacity.
When Attics, Crawlspaces, or Old Ducts Add Work
Accessible unfinished basements generally cost less to work in than tight crawlspaces or finished ceilings. Difficult routing, asbestos-containing materials, damaged framing, or a need to open and patch walls can add $500-$3,000 or more. Removing old ducts may add $300-$1,500, depending on volume and disposal needs.
Propane arrangements also vary. A leased tank may require a modest setup charge or ongoing supplier terms; purchasing and placing a tank can add $1,000-$3,500. New propane piping, regulator work, or a longer line to the furnace may add several hundred dollars.
Get tank ownership, removal, venting, and finish repairs listed separately so the quote does not hide extra charges. Local permit and inspection fees often range from $100-$500, though code corrections can cost more.
Regional Labor Rates for Furnace and Duct Installation
Prices in rural areas with lower labor rates may be 5%-15% below a national midrange estimate, while high-cost metro markets can run 15%-30% above it. Cold-climate areas may also have greater demand during fall and winter, and older homes can require more venting or duct modifications than newer construction.
Compare local quotes using the same furnace capacity, efficiency, duct footage, and tank scope. A lower bid may exclude permits, disposal, or duct sealing rather than reflect a true savings. Ask whether the price includes a load calculation and airflow testing.
How Long Installation Takes and Why Crew Size Matters
A straightforward furnace replacement with existing ducts may take 8-12 hours for a two-person crew. Installing ducts throughout a home commonly takes 2-5 days, often with a three- or four-person crew. Finished-wall access, multiple floors, and custom sheet-metal transitions can extend the schedule.
Labor pricing is not simply hours multiplied by wages: estimates can include travel, insurance, overhead, testing, and warranty support. Request a written labor scope showing furnace setting, venting, duct sealing, startup, and final safety checks.
Three Example Quotes for Different House Sizes
| Project scenario | Scope and labor | Estimated total |
|---|---|---|
| Small home, 1,000 sq. ft. | 60,000-BTU furnace; 120 ft. of duct at $18-$28 per ft.; 20-28 labor hours | $8,000-$11,500 |
| Mid-size home, 1,700 sq. ft. | 80,000-BTU furnace; 200 ft. of duct at $20-$30 per ft.; 32-45 labor hours | $11,500-$17,500 |
| Large home, 2,500 sq. ft. | 100,000-BTU furnace; 280 ft. of duct at $22-$35 per ft.; 50-70 labor hours | $17,000-$26,000 |
Examples assume ordinary access and standard materials; tank installation, major repairs, and premium equipment may increase totals.
Ways to Lower the Installed Propane Heating Price
Keep usable duct runs if they pass inspection and can be sealed, insulated, and balanced. Replacing only damaged sections may cost substantially less than rebuilding every branch. Compare at least three itemized bids and verify that each includes similar equipment efficiency, duct footage, permits, and disposal.
Control the scope before choosing upgrades: pay for properly sized equipment and sound airflow before premium features. Scheduling outside peak heating season may improve contractor availability, but avoid delaying urgent failures if the home could freeze. Prepare clear access to the furnace and duct routes, and ask whether a tank lease is cheaper over the expected ownership period than buying one.