High

Typical buyers replacing both a high-efficiency furnace and air conditioner pay between $6,000 and $18,000 depending on system size, ductwork condition, and local labor. This article lists the combined cost ranges and the main drivers that affect the price for a high-efficiency furnace and air conditioner cost estimate.

Typical Installed Price for a High-Efficiency Furnace and Matched AC

Most whole-home, matched high-efficiency furnace + AC replacements cost about $6,000-$18,000 total. A common scenario: 2.5–3.5 ton AC (central) and a 60,000–100,000 BTU furnace for a 1,500–2,500 sq ft home.

Assumptions: Assumptions: suburban contractor rates, standard single-story home, moderate access, replacement of like-for-like fuel (gas furnace), no major code upgrades.

Per-unit breakout: furnace $1,800-$7,500; AC $2,400-$7,000; per ton AC $1,200-$3,000; labor $75-$125 per hour.

How Equipment, Labor, Permits, and Disposal Add Up

Equipment and materials typically represent the largest single portion of the quote, followed by labor and any duct or electrical work. Premium two-stage or variable-speed equipment and matched manufacturer systems push the materials line higher.

How Home Size, AC Tonnage, and Furnace BTU Change the Final Quote

System capacity is a primary price lever: moving from 2 to 4 tons typically increases AC equipment cost by $1,200-$4,000. Numeric thresholds that affect price: AC tonnage under 2.5, 2.5–3.5, and over 3.5; furnace size bands 40k–60k, 60k–90k, over 90k BTU.

Examples: upgrading from a 2-ton to a 3.5-ton unit can add $1,800-$4,200 in equipment; choosing a 95% AFUE furnace vs. 98% modulating can add $800-$2,500.

Ductwork Condition, Access, and Line-Set Length That Increase Costs

Expect $800-$8,000 extra for duct sealing, partial replacement, or full duct redesign, and $200-$1,000 for long refrigerant line-sets or hard-to-access installations. Common thresholds: simple sealing (under 200 linear ft of ducts), partial replacement (200–600 linear ft), full replacement (600+ linear ft).

Restricted attic or crawlspace access can add labor hours; factor 4–12 extra labor hours at $75-$125/hour for difficult access.

Ways to Reduce the Combined Furnace and AC Price Without Sacrificing Safety

Control scope: replace only failing components, choose mid-tier matched equipment, and do duct sealing instead of full replacement when possible. Get three itemized quotes, accept off-peak scheduling, and bundle HVAC service with other home projects to negotiate better labor pricing.

Other tactics: retain existing line-set if compatible ($0-$800 savings), avoid unnecessary electrical panel upgrades by confirming breaker capacity before quoting, and plan replacements in shoulder seasons for lower labor demand.

Regional Price Differences and What To Budget by Area

Prices vary roughly ±15–30% across U.S. regions—higher in the Northeast and West Coast, lower in parts of the Midwest and South. Example deltas: urban Northeast +15–25%, West Coast +20–30%, Midwest -10–15% versus national average.

For budgeting: expect $8,000-$12,000 average in high-cost metro areas and $6,000-$10,000 in lower-cost regions for comparable equipment and scope.

Real-World Quote Examples With Equipment, Labor, and Totals

These quotes include standard disposal and basic refrigerant charging; they exclude major duct replacement and structural changes.