Methodology and Data Sources

We publish specific numbers, so we owe you an explanation of where they come from and what they can and cannot tell you. This page covers every category of figure on the site.

Population, land area, and geography

County population figures come from the US Census Bureau Population Estimates Program, Vintage 2024 county totals. Land area, water area, and geographic centroids come from the Census Bureau 2024 Gazetteer Files. We cover all 3,144 counties and county equivalents in the 50 states and the District of Columbia, including Louisiana parishes, Alaska boroughs and census areas, Connecticut planning regions, and independent cities.

Population density, service radius, and each county's rank within its state are calculated from those two sources rather than taken from a third party.

Climate figures

State level temperature and humidity characteristics are drawn from NOAA US Climate Normals for populated areas within each state. County level figures adjust those state baselines using each county's latitude relative to its state median and its water area share, since latitude drives winter temperature variation within a state and large water bodies moderate both extremes. These are approximations intended to convey the size of local heating and cooling loads, not precise station readings. For exact local normals, consult the NOAA station nearest you.

Repair and replacement costs

Baseline national cost ranges reflect published contractor flat rate conventions, national home services pricing surveys, and equipment and parts pricing at distributor level, reviewed against multiple independent published ranges for each repair type. They include parts and labor.

Those national ranges are then adjusted to each county by a cost index built from two inputs: the state's prevailing HVAC labor cost relative to the national average, and local population density, which correlates with both overhead and market competition. Sparsely populated counties receive an additional adjustment reflecting travel time. The resulting index is shown on each county page so you can see the adjustment being applied.

What these numbers are not. They are not quotes, and no contractor is bound by them. Actual pricing varies with equipment condition, access difficulty, parts availability, timing within the season, and the individual company's pricing model. Use our ranges to recognize an outlier quote, not to argue a contractor down to a number you read online. Always get written quotes, and for anything over a few hundred dollars, get more than one.

Electricity rates

Residential electricity prices reference US Energy Information Administration state level residential data. Rates change, and your utility's current tariff is the authoritative figure for your own calculations.

Efficiency, tax credits, and rebates

Equipment efficiency specifications come from manufacturer published documentation and AHRI certified ratings. Federal tax credit information reflects the IRS Energy Efficient Home Improvement Credit (25C). Tax rules change and eligibility depends on your circumstances; confirm current requirements with the IRS or a tax professional before relying on a credit.

How location pages are written

Our county pages are assembled programmatically from the datasets above. That process is deliberate and worth describing plainly: each page is built from the specific county's population, density, land and water area, rank within its state, latitude adjusted climate, and locally computed cost index, so that the guidance reflects that county rather than a generic template with a name swapped in.

The editorial framework, which problems to cover, how to explain the repair versus replace decision, what maintenance to recommend, is written by our editors and reviewed periodically. The per county specifics are generated from data. We think that combination is more useful and more honest than pretending a person has hand written 3,144 separate articles, and more accurate than publishing one generic page for the whole country.

Corrections

If you find an error, tell us and we will fix it. Email hello@hvacrepairnearme.us with the page and the problem. We correct factual errors promptly and update the reviewed date when we do.

Editorial independence

We do not accept payment from manufacturers for favorable coverage, and brand assessments reflect published reliability data, warranty terms, and parts availability rather than commercial relationships. Our Terms of Service and Privacy Policy describe how the telephone number on this site works and how we may be compensated in connection with calls.