92% across the 104 HVAC contractor websites we inspected.

HVAC has the highest rate of the three trades, which fits what the accessibility numbers showed. HVAC sites carry the most bought-in blocks and widgets, and each one arrives with its own idea of what a heading is.

That puts HVAC above the combined figure of 88.4% across all 380 brands , by 3.6 percentage points. Here is the same measurement in the other two trades we inspected.

Trade	Pages with more than one main heading	Sites
HVAC (this page)	92%	104
Roofing	90%	130
Remodeling	84.3%	146

Why it costs you work

The main heading is the page telling Google what it is about. Two of them means the page says two different things and Google has to pick one, which it may well get wrong. And it is no longer only Google reading it. It is also whatever writes the answer when a customer asks ChatGPT who fixes roofs in their town.

Checking your own HVAC site

Open a service page on a computer, right-click and choose View Page Source, then use the find box to search for h1. If it turns up more than twice, once to open and once to close, you have found the problem. The usual cause is a drag-and-drop page builder that quietly makes every block headline a main heading.

Everything else we measured on HVAC sites

Measurement	HVAC
Sites people with disabilities cannot use	64.4%
Sites that are hard to use for the disabled	98.1%
How long sites take to load on a phone	6.24s
Quote form field count	29.9%
Multi-step forms	1%
Named customer testimonials	52.9%

What was measured: Share of brands with multiple H1s on any captured page (not a homepage figure).
How we measured it: We read the underlying code of each page and counted how many main headings it declares, since every page is meant to have exactly one.
The technical version, for anyone checking our work: brands with >1 <h1> on AT LEAST ONE captured page
Scope: any captured page
Denominator: 104 HVAC brands.
Collection window: 2026-05-10 to 2026-05-16
Who ran it: Fervor Studio, first-party capture. Nobody paid to be included or excluded.

This measurement across every trade: Pages with more than one main heading. How the capture works: the methodology.

The full report behind the HVAC numbers: State of HVAC. Or see how individual HVAC brands scored on the HVAC leaderboard.