Editorial policy

Sources, method and corrections

Last updated 2026-09-23.

Every price range and rule on this site names where it came from and the day we read it. This page lists those sources, explains how we gather DFW price data, and tells you how to report an error. It applies to the Dallas AC installation guide and to the disclosure.

Rules we write by

Every cost figure carries its source and the date we read it. We publish no cost figure of our own until our quote log holds at least twelve dated DFW quotes for that cell; until then the site shows published ranges from named sources and says so.
Regulatory statements (efficiency minimums, refrigerant rules, licensing, permits, incentives, tax) name the authority and, where we could not confirm the current text on the authority's own site, carry a "verify" mark.
No invented people. There is no named reviewer on this site yet; when a TDLR-licensed contractor or a mechanical engineer reviews a section, their name and license appear on it and nowhere else.
The last-reviewed date changes only when the content changes.

Sources used on the home page

National Weather Service Fort Worth, "DFW 100° Day Data" — https://www.weather.gov/fwd/d100data (retrieved 2026-09-23)
NWS Fort Worth — https://www.weather.gov/fwd/d100data (retrieved 2026-09-23)
NWS Fort Worth, "DFW 100° Info" — https://www.weather.gov/fwd/d100info (retrieved 2026-09-23)
AHRI, "2023 Energy Efficiency Standards"; DOE regional standards — https://www.ahrinet.org/2023-energy-efficiency-standards (retrieved 2026-09-23)
NAHB summary of the EPA final rule (May 2026); EPA AIM Act Technology Transitions program — https://www.nahb.org/blog/2026/05/epa-hvac-refrigerants-r-410a-final-rule (retrieved 2026-09-23)
Texas Department of Licensing and Regulation, Air Conditioning and Refrigeration program — https://www.tdlr.texas.gov/acr/ (retrieved 2026-09-23)
City of Dallas Development Services, mechanical permits (Dallas Mechanical Code, Chapter 55 amendments); process and fee: verify with the City before relying on it — https://dallascityhall.com/departments/sustainabledevelopment/buildinginspection/Pages/plumbing_mechanical.aspx (retrieved 2026-09-23) — verify before relying on it
City of Dallas, "Current City Code" — https://dallascityhall.com/departments/sustainabledevelopment/buildinginspection/Pages/know_code.aspx (retrieved 2026-09-23) — verify before relying on it
Oncor "Take A Load Off Texas" — https://www.takealoadofftexas.com/ (retrieved 2026-09-23) — verify before relying on it
IRS, Energy Efficient Home Improvement Credit — https://www.irs.gov/credits-deductions/energy-efficient-home-improvement-credit (retrieved 2026-09-23)
Texas Comptroller, Publication 94-116, "Real Property Repair and Remodeling" — https://comptroller.texas.gov/taxes/publications/94-116.php (retrieved 2026-09-23)
ENERGY STAR, "When is it time to replace?" — https://www.energystar.gov/saveathome/heating-cooling/replace (retrieved 2026-09-23)
Texas Penal Code §16.02 — https://statutes.capitol.texas.gov/Docs/PE/htm/PE.16.htm (retrieved 2026-09-23)

Published price ranges

Cold Factor Heating & Air (Flower Mound, TX), page dated 2026, retrieved 2026-09-23 — https://coldfactor.com/how-much-does-ac-replacement-cost-in-dfw-2026-pricing-guide/
HVAC Services Pro (DFW), page dated 2026-04-13, retrieved 2026-09-23 — https://hvacservicespro.com/central-air-installation-cost/
HVAC Services Pro, DFW installation guide, page dated 2026-03-06, retrieved 2026-09-23 — https://hvacservicespro.com/dfw-hvac-installation-cost-guide/
HVACProjectCost.com, Dallas page, page dated 2026-08-02, retrieved 2026-09-23 — https://hvacprojectcost.com/hvac-replacement-cost-dallas-tx/

Common questions about our sourcing

Why does the site publish other people's price ranges instead of its own?

Because a price we have not gathered is a guess. Our rule is at least twelve dated DFW quotes for a given system size before we publish a figure as ours. Until the quote log reaches that, we show what named DFW contractors and cost publishers have put in print, with the date each page carried when we read it.

What does the "verify" mark mean?

That we could not confirm the current wording on the authority's own website, usually because the page is a PDF, a portal or behind a form. The statement reflects the best available source, and you should confirm it with the authority named before you rely on it.

Why is there no named reviewer?

Because we have not recruited one. A byline from a licensed contractor or mechanical engineer appears only when a real person has reviewed the section, and never before.

Corrections

If a figure, rule or date on this site is wrong, email hello@acinstallationdallas.com with the page section and the source you are relying on. Corrections are made on the page and noted here with the date.

No corrections logged. Last reviewed 2026-09-23.