HVAC research and data
The core numbers a homeowner needs in 2026: full HVAC replacement generally runs $5,000 to $28,000 with most 2,000 sq ft homes at $7,000 to $20,000 (CBS News); furnaces last 15 to 30 years and AC and heat pumps 15 to 20 (Carrier); efficiency has been rated as SEER2, EER2 and HSPF2 since January 1, 2023; and new equipment is transitioning from R-410A to lower-GWP refrigerants.
Cost data is the most abused category in this industry. National averages compress enormous regional and scope variation, and many published figures come from lead-generation sites with an incentive to make the number look either alarming or reassuring. We link to the source for every figure so you can check it.
On standards: the SEER2 test procedure raised external static pressure from 0.1 to 0.5 inches of water, five times the prior level, which is why SEER2 numbers look lower than legacy SEER for equivalent equipment. National heat pump minimums are 14.3 SEER2 / 7.5 HSPF2 for split systems and 13.4 SEER2 / 6.7 HSPF2 for single-package units.
On incentives: the IRS states the Energy Efficient Home Improvement Credit applies to qualifying property placed in service before December 31, 2025. Any current-year claim about federal credits should be checked against the IRS page directly rather than a contractor's sales sheet.
Choosing HVAC what the data says
The judgement calls that decide the bill, before anyone quotes you.
- Check who published the number Manufacturer, government agency, trade association, or a lead-generation site. All four have different incentives.
- Prefer ranges to averages A single national average tells you almost nothing about what your job will cost. A sourced range at least shows the spread.
- Check the date on any cost figure Equipment pricing has moved significantly with the efficiency and refrigerant changes. A 2022 number is not a 2026 number.
- Government sources beat commentary for rules IRS for tax credits, EPA for refrigerant and technician certification, your local building department for permits.
- Your three local bids are better data than any national figure Use published ranges to spot an outlier bid, not to predict your price.
All HVAC research
HVAC Cost Index
Heat Pump Adoption Index
Cooling Cost Index by Metro
Heating Cost Index by Metro
HVAC Failure Seasonality Report
Where these figures come from
Sources last checked
- CBS News - How much does a new HVAC system really cost in 2026? · retrieved 2026-07-25
- HVAC Project Cost - HVAC Replacement Cost 2026 · retrieved 2026-07-25
- Carrier - How Long Do HVAC Systems Last? · retrieved 2026-07-25
- SEER2.com - About SEER2 · retrieved 2026-07-25
- IRS - Energy Efficient Home Improvement Credit · retrieved 2026-07-25
- Lennox - New HVAC Refrigerant 2025 · retrieved 2026-07-25
You know more than the last homeowner they quoted.
That is worth something only while you are still choosing. Tell us what is going on and we will match you with a few HVAC pros whose licence and insurance we have already checked - free, no obligation.