Independent public research

Help keep HVAC ownership research open to everyone.

Tracing who owns a contractor can take time: company names change, parent companies sit behind local brands, and public records do not always agree. This project gathers the sources and explains what they do—and do not—show.

A contribution helps maintain the free database, map, and research behind it. Give an amount that feels right for you; the site remains free if you choose not to give.

Choose your contribution

One-time payment. Enter any amount from $1 to $100,000.

Suggested amounts

USD · Minimum $1 · Maximum $100,000

Secure checkout is handled by Whop. Donations do not buy listings, recommendations, or influence over ownership findings.

What your support sustains

Useful information should not depend on who can afford a subscription.

Keep the research open

The ownership database, map, and search tools stay free for homeowners, journalists, and researchers.

Keep records current

Contributions help make room for source checks, ownership changes, and corrections across the markets we cover.

Show the evidence

The project publishes sources and uncertainty so people can inspect how a record was classified.

Contributions are voluntary and are not represented as tax-deductible charitable gifts. They do not change a company’s classification, record order, or inclusion in the directory.