Replacing a 5-ton central air conditioner and a gas furnace is a significant home improvement. Total installed cost depends on efficiency, brand, ductwork, and installation complexity. In the United States, homeowners typically budget between $8,000 and $15,000 for a new 5-ton system, though prices can be lower or higher. Factors such as SEER cooling efficiency, AFUE furnace efficiency, duct condition, electrical upgrades, and local labor rates can shift the price by several thousand dollars. Understanding the cost breakdown helps homeowners plan, compare quotes, and avoid surprise charges. This guide covers typical costs, influencing factors, and practical optimization tips.
Overview Of Replacing A 5 Ton AC And Furnace
A 5-ton system matches around 60,000 BTU/h of cooling capacity and is common for larger homes or spaces with higher cooling needs. Replacing both outdoor equipment and the indoor furnace usually requires a matched system so the outdoor condenser and indoor air handler or furnace work together efficiently. A complete replacement often includes new duct connections, refrigerant lines, thermostats, and electrical upgrades. Proper sizing, however, relies on a professional load calculation. A poorly sized system can drive up energy use and reduce comfort, even if the equipment itself is efficient. Duct condition and insulation significantly influence results and may add to costs if upgrades are needed.
Choosing a matched system ensures optimal efficiency and warranty coverage. Existing ductwork, refrigerant type, and electrical service can complicate installation and affect pricing. Homeowners should expect a multi-step process that includes removal of old units, installation of new equipment, refrigerant charging, duct and air-flow adjustments, and a thorough start-up inspection. A well-planned replacement can deliver improved comfort, lower energy bills, and better indoor air quality.
Key takeaway: A 5-ton replacement is not only about the outdoor compressor and indoor furnace; it involves ductwork, controls, and proper system pairing to maximize efficiency and reliability.
Cost Breakdown: Equipment, Labor, And Permits
The total installed price combines three major components: equipment cost, labor, and ancillary fees. Understanding each helps homeowners compare bids and spot divergent line items. Below are typical ranges for common configurations.
Equipment Costs
For a 5-ton system, the outdoor AC unit and indoor furnace or air handler account for the bulk of equipment expenses. A mid-range 14-16 SEER air conditioner paired with a mid-efficiency furnace often falls in the following ranges: a complete 5-ton AC unit installed generally costs about $2,500 to $4,500 for the outdoor condenser, while a gas furnace with 90% AFUE to 95%+ AFUE can run roughly $2,000 to $4,500. When both components are purchased together, equipment costs typically total around $4,500 to $9,000 for mid-range packages, with premium combinations reaching $9,000 to $14,000 or more. High-efficiency, variable-speed systems with advanced controls can push equipment-only costs higher still.
In practice, most homeowners see installed equipment costs in the $6,000 to $12,000 range for a complete mid-range 5-ton setup, excluding labor. Budget-conscious choices exist, but they often come with trade-offs in efficiency, noise, or future reliability. Premium systems with 18- to 21-plus SEER cooling and 95% AFUE or better furnaces, plus variable-speed operation, can significantly raise equipment costs to the $9,000–$14,000 range or more, depending on the brand and features.
Labor Costs
Labor covers teardown of the old equipment, installation of the new system, refrigerant work, duct connections, electrical wiring, thermostat setup, and commissioning. Typical labor costs for a 5-ton replacement range from $1,500 to $3,000, depending on the complexity, the number of stories, accessibility, and the local market. Homes with challenging ductruns or the need for significant ductwork modifications can push labor toward the higher end of this range. In some markets, labor may be quoted hourly; in others, a flat installed-price is provided.
Extra labor can appear if duct sealing or replacement is necessary, if the electrical panel must be upgraded to accommodate higher load, or if a gas line upgrade is required for the furnace. These factors influence the total price and should be clearly itemized in bids.
Permits, Disposal, And Additional Fees
Permits typically range from $100 to $500, depending on local codes and municipality requirements. Disposal of old equipment and refrigerant reclamation can add $100 to $300 to the bill. Additional fees may include refrigerant recovery charges, line-set replacement, insulation for refrigerant lines, and taxes. Some contractors include basic start-up checks and warranty verification in the installed price, while others itemize these as separate services. Always confirm scope and inclusions before authorizing work.
Tip: Get a written breakdown that separates equipment, labor, permits, and disposal so comparisons between bids are meaningful and complete.
Typical Cost Ranges For A 5-Ton System
| System Type | Typical Installed Cost Range | Notes |
|---|---|---|
| Standard Efficiency (14-16 SEER AC + 80-85 AFUE Furnace) | 7,500–11,000 USD | Reliability with modest energy savings; basic comfort |
| Mid-Range (16-18 SEER AC + 90% AFUE Furnace) | 9,500–14,000 USD | Better efficiency and potential rebates; balanced cost |
| High Efficiency (18-21+ SEER + 95%+ AFUE, Variable-Speed) | 12,000–18,000 USD | Substantial energy savings; higher upfront cost |
| Premium With Zone Control | 15,000–22,000 USD | Maximum comfort and control; complex installation |
These ranges reflect common configurations and typical market conditions. Actual prices vary by region, brand, ductwork requirements, and installation challenges. Utilities or manufacturers may offer rebates that reduce the net price, while premium warranties add value. Always request a comprehensive bid that includes a load calculation, duct assessment, and a clear warranty description to ensure you are comparing apples to apples.
Factors That Influence Total Cost
- Duct Condition And Size: Ductwork in poor condition or mis-sized ducts can require sealing, insulation, or replacement, which increases cost but improves performance.
- System Matching: A truly matched outdoor condenser and indoor air handler or furnace maximizes efficiency and warranty coverage; mismatches can raise energy consumption and repair costs.
- Efficiency Ratings: Higher SEER and AFUE ratings raise equipment costs but typically lower energy bills and provide better comfort.
- Installation Complexity: Multi-story homes, limited access, oversized or undersized electrical panels, or the need for gas-line upgrades add labor time and expense.
- Rebates And Incentives: Local utility programs and state incentives can significantly offset upfront costs; incentives vary by location and equipment choice.
: Well-known brands with longer warranties may fetch higher bids; compare labor and parts warranties carefully. : Warranties on compressors are common, while refrigerant costs are factored into line-set charging; refrigerant type requirements can affect price. : Local codes may require inspections, which adds to total time and cost but supports safety and performance.
Energy Efficiency, Rebates, And Long-Term Savings
Higher efficiency systems reduce energy consumption, which lowers monthly utility bills. The energy savings accumulate over the life of the equipment and can offset higher upfront costs over several years, depending on usage patterns and climate. In many markets, rebates from utilities or manufacturers can reduce the net installed price by hundreds to thousands of dollars. Tax incentives or credits may also apply, though they vary by year and program. Prospective buyers should check Energy Star resources, DSIRE (Database of State Incentives for Renewables & Efficiency), and local utility programs for current offers and eligibility. These incentives can influence the payback period and overall value of the upgrade.
Important: When evaluating efficiency, consider long-term operating costs, not just the upfront price. A higher SEER/AFUE system may pay for itself through energy savings, improved comfort, and reduced repair needs over time.
Choosing A Qualified Contractor
Selecting the right contractor is as important as choosing equipment. A good installer ensures proper sizing, installation quality, and post-install support. Consider the following criteria when evaluating bids.
Verify state licensing where required and ask for current insurance, including workers’ compensation and liability coverage. Ensure the contractor performs a Manual J load calculation and a duct inspection to confirm the proper system size and airflow. Look for technicians with National Appliance Heating & Air Conditioning Certification (NATE) or equivalent training. Quotes should detail equipment, efficiency ratings, labor, permits, disposal, warranties, and start-up procedures. Check references and understand warranty terms for parts and labor, including start-up service. Ask about protection of existing floors, dust control, and post-install cleanup. Inquire about maintenance plans, filter changes, and seasonal check-ups for ongoing efficiency.
Financing, Warranties, And Maintenance
Financing options help manage upfront costs. Many HVAC contractors offer promotional financing with low or zero-interest terms for a limited period, or longer-term plans with reasonable APR. Warranties typically cover parts for 5–10 years and may include a labor warranty for a shorter period; some manufacturers offer extended warranties with registration. Maintenance plans, including annual inspections and filter replacements, help sustain performance and efficiency. Prospective buyers should compare warranty specifics, transferability, and what maintenance tasks are included.
Tip: Confirm what is covered under the warranty for both parts and labor, and whether the warranty stays valid if the system is serviced by a non-authorized technician.
What To Expect During Installation
Installation generally unfolds in stages designed to minimize downtime and ensure safe, reliable operation. First, the old equipment is removed and brought to proper disposal. Next, the new outdoor condenser is placed on a stable pad, with refrigerant lines and electrical connections routed to the indoor air handler or furnace. The indoor unit is installed, sealed, and tested for airflow and proper combustion. A refrigerant charge check is performed, followed by a system start-up that includes thermostat calibration and leak testing. Finally, technicians explain routine maintenance and provide warranty documentation.
During and after the installation, homeowners should monitor for unusual noises, uneven cooling, or poor humidity control, and report any concerns promptly. A well-executed installation delivers reliable cooling, quiet operation, and consistent indoor comfort. Return visits for warranty-related service should be part of the contractor’s aftercare plan.
