How we work

Methodology and sources

By the HeatAndAirCost editors · Last updated October 5, 2026 · How we research prices

HeatAndAirCost publishes researched 2026 cost ranges for home HVAC repairs and replacements, alongside plain-English guides for common furnace and AC problems. This page explains where the numbers come from and, just as important, what they are not.

Where our numbers come from

Every dollar range on this site is compiled from published cost research by established home-services publishers, primarily HomeGuide, Fixr, This Old House, and Thumbtack. We restate their figures as ranges and cite the specific page next to the number. We do not collect or invent our own pricing, and we do not present any figure as a quote.

How we verify sources

Before publishing, we check that each source URL resolves for a real reader. We deliberately exclude pages that block ordinary visitors so that every citation you click actually opens. When a publisher updates its figures, we update ours and change the “last updated” date on the page.

Public data on the city pages

Each city page carries a section of figures taken from federal datasets, so the page says something specific about that place rather than repeating a national range. We use five sources, all U.S. government works in the public domain:

Climate load: NOAA NCEI U.S. Climate Normals, 1991 to 2020. We use the first-order (airport) weather station nearest the Census center point of the city, unless a closer-matching station is clearly better, in which case the page says why. Degree days use a 65°F base.
Energy prices: U.S. Energy Information Administration, average residential electricity price and the price of natural gas delivered to residential consumers, by state, for the latest full year.
Heating fuel and housing age: U.S. Census Bureau, American Community Survey 5-year estimates for the city (tables B25040, B25034 and B25035). These are survey estimates with margins of error.
Contractor businesses: U.S. Census Bureau, County Business Patterns, industry code 238220 (plumbing, heating and air-conditioning contractors) for the county. The code includes plumbers, and values Census withholds are shown as withheld, never as zero.
Technician wages: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, occupation 49-9021, for the metropolitan area, compared with the national figure from the same release.

The only arithmetic we add is shown on the page: percentages of published counts, ratios between two published numbers, and differences against the U.S. figure from the same series. We do not rate, rank or recommend any business. Every block shows the period the data covers and the date we retrieved it; if a figure is older than its source's update cycle plus 30 days, the page says it may be outdated. A city page is published only when at least three of its figures differ from every other city page we publish. The scripts that fetch the data are re-run on the schedule each source publishes, and a correction link on every city page reaches us at hello@heatandaircost.com.

The honest limits of a price range

A national range tells you whether a quote is roughly fair. It cannot tell you your exact price. Real costs depend on your equipment, the failed part, your local labor rates, permit fees, and access to the unit. Only a licensed contractor who inspects your system can give you an actual price. Use our ranges to walk into that conversation informed, then read how to choose a contractor and get at least three written quotes.

Our byline and independence

Content is written and maintained by the HeatAndAirCost editors. We do not publish invented author personas, testimonials, star ratings, or stock “expert” headshots. We are an independent cost-research publisher operated by Kindred Works LLC, we are not a contractor, and we take no payment from you. See our disclosure for how the site is funded and our about page for who runs it.

Full source list

Every cost page links its figures to one or more of these published sources:

Source links open in a new tab and are marked nofollow. Figures reflect published 2026 data at the time of our last update.

Site policies

Disclosure. How the site is funded and why the contractor referral stays free to you.
Privacy policy. What we collect, what we do not, and how the analytics consent choice works.
Terms of use. The terms that apply when you use the guides and the quote request form.

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Check a fair price

Use the cost pages to compare any quote against a researched 2026 range.

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