Planning scope, not professional equipment sizing.
Home size selects a broad planning band only. Final capacity must come from a professional load calculation that considers climate, insulation, air leakage, windows, orientation, occupancy, duct condition, and local design temperatures.
Four systems with distinct cost logic.
Central air conditioner, gas furnace, combined central AC and gas furnace, and ducted heat-pump replacements each use their own equipment tiers, labor allowances, and applicable connection work.
Equipment and efficiency
National equipment-only observations are grouped into Standard, Higher, and Premium tiers. Current federal and ENERGY STAR references provide efficiency context; the model does not claim that the highest tier is always the best financial choice.
State HVAC labor
May 2025 BLS OEWS median hourly wages for SOC 49-9021 create a state-to-national labor factor. The factor changes supported labor shares only and is not treated as a contractor billing rate.
Ducts, removal, and connections
Ductwork, equipment removal labor, disposal, controls, electrical or gas work, refrigerant materials, line sets, drains, pads, and lifting are separate components. Fixed materials and disposal are not fully regionalized.
Permits and exclusions
A user-confirmed permit fee replaces the national planning range. Rebates, incentives, major service upgrades, extensive gas work, structural work, hazardous-material remediation, and unselected code corrections remain excluded.
Price tiers do not certify equipment.
The calculator uses current DOE and ENERGY STAR context to explain broad price and configuration tiers. Always verify the exact AHRI-rated indoor and outdoor match, regional requirements, and any claimed certification.
Central air conditioner
Standard represents a current regional minimum-compliant match, generally 13.4–14.3 SEER2 depending on capacity and region. Higher centers on 15.2 SEER2 or better. Premium commonly adds staged or variable capacity.
Gas furnace
Higher uses ENERGY STAR context of 90% AFUE in the US South and 95% in the US North. The federal 95% AFUE compliance date of December 18, 2028 is future and is not presented as current.
Ducted heat pump
Standard uses current 14.3 SEER2 and 7.5 HSPF2 split-system context. Higher uses ENERGY STAR 15.2 SEER2, 11.0 EER2, and 7.8 HSPF2. Premium may describe cold-climate-capable equipment but never claims certification.
Professional selection
Efficiency is only one part of a specification. Load sizing, climate performance, ducts, controls, electrical capacity, fuel and venting, refrigerant, noise, warranty, and service support all matter.
Five HVAC replacement scenarios
These examples use the same equipment, labor, removal, duct, and permit logic as the calculator with a national planning location. Capacity remains a planning band until a professional load calculation is completed.
Central air conditioner replacement
Typical mid-size home; standard efficiency tier; minor duct repair; basement equipment; standard access; removal and a disconnect allowance.
- Largest driver
- System type, equipment tier, capacity band, and installation labor
- Included
- Equipment, installation, removal, disposal, selected ductwork, connections, and national permit planning allowance
- Outside this scenario
- Manual J sizing, incentive subtraction, service upgrades, and job-specific code findings
Gas furnace replacement
Typical mid-size home; standard efficiency tier; minor duct repair; basement equipment; standard access; removal and a disconnect allowance.
- Largest driver
- System type, equipment tier, capacity band, and installation labor
- Included
- Equipment, installation, removal, disposal, selected ductwork, connections, and national permit planning allowance
- Outside this scenario
- Manual J sizing, incentive subtraction, service upgrades, and job-specific code findings
Central AC and gas furnace replacement
Typical mid-size home; standard efficiency tier; minor duct repair; basement equipment; standard access; removal and a disconnect allowance.
- Largest driver
- System type, equipment tier, capacity band, and installation labor
- Included
- Equipment, installation, removal, disposal, selected ductwork, connections, and national permit planning allowance
- Outside this scenario
- Manual J sizing, incentive subtraction, service upgrades, and job-specific code findings
Ducted heat pump replacement
Typical mid-size home; standard efficiency tier; minor duct repair; basement equipment; standard access; removal and a disconnect allowance.
- Largest driver
- System type, equipment tier, capacity band, and installation labor
- Included
- Equipment, installation, removal, disposal, selected ductwork, connections, and national permit planning allowance
- Outside this scenario
- Manual J sizing, incentive subtraction, service upgrades, and job-specific code findings
Larger home · ducted heat pump
Larger home; standard efficiency tier; minor duct repair; basement equipment; standard access; removal and a disconnect allowance.
- Largest driver
- Capacity band and heat-pump equipment configuration
- Included
- Equipment, installation, removal, disposal, duct repair, refrigerant materials, and permit planning allowance
- Outside this scenario
- Professional load calculation, rebates, electrical service upgrades, and local quote conditions
Range and rounding
Every supported component carries Low, Typical, and High values. Display values are rounded to planning-level increments, then summed so the visible breakdown matches the visible total.
Current data versions
- bls-oews-2025-hvac-v1
- hvac-equipment-prices-2026-07-v2
- hvac-additional-costs-2026-07-v1
- hvac-efficiency-guidance-2026-07-v1
- hvac-replacement-0.1.0
Ask for the same HVAC scope in writing.
- What load calculation and design conditions support the proposed capacity?
- What exact indoor, outdoor, furnace, coil, air-handler, thermostat, and AHRI match is included?
- Are removal, disposal, permits, refrigerant work, line set, drain, pad, electrical, gas, ducts, startup, and testing included?
- What manufacturer, labor, and workmanship coverage applies, and who registers the equipment?
- Which rebates or credits are confirmed for the exact system, and what happens if eligibility changes?
Turn the range into a comparable scope.
Before you compare HVAC bids
Is this HVAC estimate a contractor quote?
No. It is an early planning range. Final capacity, matched equipment, code scope, refrigerant and electrical requirements, local availability, and contractor overhead can change a bid.
Does home size determine the HVAC capacity I need?
No. Home size selects only a broad planning band. A qualified professional should perform a load calculation using climate, insulation, air leakage, windows, orientation, occupancy, ducts, and local design temperatures.
Does the estimate include ductwork?
Only the scope you select. Usable or unknown ducts add no work. Minor repair, partial replacement, and full replacement use distinct ranges, and actual layout and accessibility still require inspection.
Are rebates or tax credits subtracted?
No. Incentive eligibility depends on exact certified equipment, installation, location, dates, tax circumstances, and program rules. The calculator does not promise or subtract an incentive.
Sources behind the HVAC model
Official labor and efficiency references, manufacturer configuration documentation, identifiable equipment observations, and explicit versioned assumptions remain distinguishable. Broad installed-cost guides are secondary validation only.
US Bureau of Labor Statistics — May 2025 OEWS HVAC occupation
US Department of Energy — Consumer Central Air Conditioners and Heat Pumps
US Department of Energy FEMP — Residential Central Air Conditioner Efficiency
US Department of Energy — Consumer Furnaces
ENERGY STAR — Heat Pump Specification Version 6.2
ENERGY STAR — Furnaces Key Product Criteria
Goodman — 2026 residential HVAC product documentation
HVACDirect — identifiable residential equipment price observations
The Home Depot — central ducted heat-pump equipment observations
Planning exterior work too? Open the Roof Replacement Cost Calculator →
Planning an interior project? Open the Bathroom Remodel Cost Calculator →
Planning a kitchen project? Open the Kitchen Remodel Cost Calculator →
Comparing HVAC proposals? Use the cross-project quote worksheet →
Planning interior floors? Open the Flooring Installation Cost Calculator →
Planning interior painting? Open the Interior Painting Cost Calculator →
Planning exterior painting? Open the Exterior Painting Cost Calculator →
Planning window work? Open the Window Replacement Cost Calculator →
Planning water-heater work? Open the Water Heater Replacement Cost Calculator →
Planning rooftop solar? Open the Solar Panel Installation Cost Calculator →
Want context before comparing HVAC bids? Read the HVAC Replacement Cost by System Type guide →