A 110,000 BTU furnace typically costs $3,500-$8,500 installed, with a common midrange price near $5,500. The final estimate depends on furnace efficiency, venting and ductwork, local labor rates, and whether the job is a straightforward replacement or a larger system change.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed gas furnace | $3,500 | $5,500 | $8,500 | Standard replacement, equipment and labor |
| Furnace equipment | $1,500 | $3,000 | $5,000 | Varies by AFUE and product tier |
| Installation labor | $1,000 | $1,800 | $3,000 | Higher for venting or access changes |
| Installed cost per input BTU | $0.032 | $0.050 | $0.077 | Based on 110,000 BTU input capacity |
What a 110,000-BTU furnace costs installed
For a natural-gas furnace replacing a similar unit, a reasonable budget is $3,500-$8,500 before unusual duct repairs or code upgrades. Basic single-stage models and uncomplicated installations tend toward the low end; high-efficiency equipment, variable-speed blowers, and extensive modifications can push a quote higher. A common middle estimate is about $5,500.
These ranges assume a residential forced-air gas furnace, standard removal, and ordinary access. The 110,000-BTU figure usually describes input capacity, not heat delivered to the home. At 80% AFUE, the unit supplies about 88,000 BTU per hour; at 96% AFUE, it supplies about 105,600 BTU per hour. Assumptions: U.S. replacement job, standard materials, no major duct redesign.
Equipment, venting, and labor in a furnace quote
Quotes should separate the furnace from installation tasks so buyers can see whether a low price excludes removal, venting, or startup. The ranges below describe typical line items; not every project needs each upgrade.
| Quote item | Low | Average | High |
|---|---|---|---|
| Furnace equipment | $1,500 | $3,000 | $5,000 |
| Removal and disposal | $100 | $250 | $500 |
| Installation labor | $1,000 | $1,800 | $3,000 |
| Venting or condensate changes | $200 | $700 | $1,500 |
| Thermostat or minor ductwork | $100 | $400 | $1,200 |
Equipment cost climbs with efficiency and controls. An 80% AFUE furnace generally uses a metal flue, while a condensing model at 90%-98% AFUE needs PVC venting and a condensate drain. If a quote includes a new return duct, gas line, electrical circuit, or major sheet-metal work, it may exceed the line-item ranges above.
How AFUE, venting, and furnace size shift the price
Efficiency and installation compatibility can matter as much as the furnace’s nominal capacity. Basic 80% AFUE equipment is often less expensive, while 95%-98% AFUE models commonly add roughly $800-$2,000 to equipment pricing. The higher-efficiency option may require a new vent route, drain, or other adjustments that add another $200-$1,500.
Capacity also deserves verification. A 110,000-BTU input furnace is not automatically appropriate because the old furnace had the same label; an oversized unit can short-cycle and may not improve comfort. A load calculation, home insulation, climate, and duct capacity help determine whether 90,000, 110,000, or another size is appropriate. Confirm whether the quoted BTU rating is input or output and request the sizing basis.
A change from an 80% non-condensing furnace to a condensing model can cost more than a like-for-like swap because venting and condensate disposal may need alteration. Tight utility closets, attic or crawlspace installations, and difficult flue access can add $300-$1,500 in labor or materials.
Control the 110,000-BTU replacement scope before signing
Ask each contractor to quote the same capacity, AFUE range, thermostat scope, removal, and venting work. Comparing two or three itemized estimates makes it easier to spot exclusions, particularly disposal, startup testing, permits, and duct transitions. A low bid is not comparable if it omits work another installer includes.
Keep usable ductwork and a compatible thermostat when inspection supports reuse. Avoid paying for a smart thermostat, upgraded filtration cabinet, or zoning system unless the home needs it. Provide clear access before installation day and arrange furnace replacement with other heating work when practical, rather than paying for separate visits.
How installation hours affect the final bill
A standard replacement often takes a two-person crew about 6-10 hours. At a combined labor charge of roughly $100-$200 per crew-hour, the labor component can land around $600-$2,000, though contractor overhead, travel, testing, and warranty administration affect the billed amount.
New venting, gas-line changes, duct repairs, or difficult removal can extend work to 10-16 hours or require an additional trade. Ask whether the estimate is fixed-price and what conditions trigger extra charges; hourly rates alone do not reveal the full labor expense.
Repairing an older furnace versus replacing it
A diagnostic visit commonly costs $75-$150, and repairs may run $150-$1,200 depending on the part and availability. Igniters, flame sensors, and basic switches are generally less expensive than control boards, blower motors, or heat exchangers. A repair quote near $1,000-$2,000 on an older unit deserves comparison with replacement pricing, especially if the furnace has repeated failures.
Heat-exchanger damage, unsafe combustion, or a failed unit near the end of its service life can favor replacement, but age alone does not settle the decision. Request a written diagnosis and compare the repair total with the cost of a properly sized replacement, including any efficiency-related fuel savings only when supported by actual usage.
Why furnace prices differ across U.S. regions
Installed prices in high-cost metro areas and regions with limited contractor availability may run 10%-25% above the national middle range. Smaller markets with lower labor costs can come in about 5%-15% below it, though remote travel and limited equipment availability may erase that difference. Local code requirements and winter demand also affect estimates.
Request the permit and inspection charges separately; where required, these may add about $50-$300, with more possible when associated electrical or venting work must be inspected. Seasonal scheduling can help avoid emergency premiums, but a failing furnace should not be operated if a technician identifies a safety hazard. Assumptions: Regional percentages compare similar equipment and installation scope, not taxes or major duct replacement.