Terms of use

Effective: September 12, 2026.

Planning estimates only

The calculators and articles on this site provide general educational planning estimates. They are not manufacturer guarantees, engineering plans, code determinations, architectural advice, fire-safety design, gas or electrical design, or professional consulting.

Verify before purchase or installation

You are responsible for verifying equipment specifications, dimensions, output, listings, utilities, ventilation, permits and applicable local requirements with manufacturers and qualified professionals.

No warranty

Information is provided “as is” to the extent permitted by law. Equipment specifications, prices and regulations can change.

Third-party links

We may link to third-party vendors. We do not control their inventory, pricing, delivery, warranties or services.

Commercial relationships

Some third-party links may be affiliate links. See our affiliate disclosure.