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Affiliate Disclosure

This page exists so you know exactly how this site makes money — as required by the FTC's Endorsement Guides (16 CFR Part 255) and by the affiliate programs we may participate in.

Commercial neutrality: the specs and the sizing math are determined and published before any commercial link is attached, and never change based on commissions. Right now no affiliate program is active — every product link on this site is a plain reference link to a manufacturer or dealer.

Affiliate links

Some product links on this site may be affiliate links to retailers such as Amazon, HVACDirect.com, or Heat & Cool. If you click one and buy something, we may earn a commission at no extra cost to you. Affiliate links are marked with rel="sponsored" and a disclosure note appears above any table that contains them. If no note appears, the links on that page are plain reference links.

As an Amazon Associate, this site earns from qualifying purchases (this sentence applies if and when the Amazon Associates relationship is active).

What affiliate money does not buy

Specs and sizing math never change based on commissions — the dataset and the calculator rules are built first, links are attached after.
Model ordering in tables is by published efficiency (SEER2), not by payout.
Brands cannot pay to be included; brands whose specs we couldn't verify are excluded regardless of affiliate programs.

Estimates, not advice

Sizing outputs are estimates based on public guidance, not an ACCA Manual J load calculation, and nothing on this site is professional, financial, or engineering advice. Confirm equipment selection with a licensed HVAC installer.