CMS Used by UK HVAC Companies: Market Share (2026)

Updated June 2026

CMS market share detected across 2,514 UK HVAC companies, with WordPress the leader at 75.2% (1,890 companies).

CMS visibility is relatively sparse across UK HVAC: 2,514 of 24,483 trading companies have a detectable platform, spread across 25 systems. WordPress accounts for 75.2% of those detections, or 1,890 companies.

Size does not change the leader. WordPress leads Under 10 employees at 74.0% of 1,717 companies, rises to 77.0% among 734 companies with 10–50 employees, and reaches 85.7% among 63 companies with Over 50 employees.

The named alternatives sit some distance behind: Wix has 10.5% (265), Squarespace 4.3% (109), Duda 3.8% (96), Webflow 1.6% (39), Joomla 1.2% (29), It'seeze 0.9% (22), and Weebly 0.5% (13). Another 17 systems cover 56 companies, so the long tail exists but is thin.

2,514

HVAC with detected CMS

Of 24,483 UK HVAC

10.3%

Detection rate

2026

Systems detected

In this category

75.2%

Leader share

WordPress

UK HVAC CMS market share

Joomla

Other (17 systems)

Share of the 2,514 UK HVAC with a detectable system. As of June 2026.

CMS compared

System	UK HVAC	Share	Median headcount	London share	Typical profile
WordPress	1,890	75.2%	6	11.4%	Six-person HVAC firms, 75.2% share
Wix	265	10.5%	6	16.6%	Six-person HVAC firms, 10.5% share
Squarespace	109	4.3%	7	12.8%	Seven-person HVAC firms, 4.3% share
Duda	96	3.8%	7	10.4%	Seven-person HVAC firms, 3.8% share
Webflow	39	1.6%	—	—	View these companies in Firmbase →
Joomla	29	1.2%	—	—	View these companies in Firmbase →
It'seeze	22	0.9%	—	—	View these companies in Firmbase →
Weebly	13	0.5%	—	—	View these companies in Firmbase →
Drupal	13	0.5%	—	—	View these companies in Firmbase →
ProcessWire	7	0.3%	—	—	View these companies in Firmbase →
Craft CMS	6	0.2%	—	—	View these companies in Firmbase →
Concrete CMS	6	0.2%	—	—	View these companies in Firmbase →
Contentful	5	0.2%	—	—	View these companies in Firmbase →
DNN	4	0.2%	—	—	View these companies in Firmbase →
October CMS	4	0.2%	—	—	View these companies in Firmbase →
Business Catalyst	4	0.2%	—	—	View these companies in Firmbase →
ExpressionEngine	3	0.1%	—	—	View these companies in Firmbase →
Tridion	3	0.1%	—	—	View these companies in Firmbase →
Prismic	3	0.1%	—	—	View these companies in Firmbase →
Adobe Experience Manager	2	0.1%	—	—	View these companies in Firmbase →
Storyblok	1	0%	—	—	View these companies in Firmbase →
MODX	1	0%	—	—	View these companies in Firmbase →
Ghost	1	0%	—	—	View these companies in Firmbase →
Blogger	1	0%	—	—	View these companies in Firmbase →
YourCMS	1	0%	—	—	View these companies in Firmbase →

Systems detected below the page threshold appear with counts only; their full lists are available in the Firmbase app.

Market leader by size

The leading CMS system shifts with company size: among UK HVAC with under 10 employees, WordPress leads at 74% of the 1,717 with a detectable system; among UK HVAC with 10–50 employees, WordPress leads at 77% of the 734 with a detectable system; and among UK HVAC with over 50 employees, WordPress leads at 85.7% of the 63 with a detectable system.

Under 10 employees

WordPress

74% of band

Under 10 employees contains 1,717 companies with a detectable CMS, and WordPress leads the band with 74.0%. Across UK HVAC overall, Wix at 10.5%, Squarespace at 4.3% and Duda at 3.8% are the nearest named alternatives.

10–50 employees

WordPress

77% of band

10–50 employees contains 734 companies with a detectable CMS, and WordPress leads with 77.0%. The wider competitor set remains fragmented, with 17 further systems covering 56 companies across UK HVAC overall.

Over 50 employees

WordPress

85.7% of band

Over 50 employees is the smallest band here, at 63 companies with a detectable CMS. WordPress leads with 85.7%, making this the most concentrated employee band shown.

How CMS usage is detected

Methodology

Company data

Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.

Detection

Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling.

Freshness

Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.

Sources

All product names are trademarks of their respective owners. Firmbase is not affiliated with, sponsored by, or endorsed by any trademark owner.

UK HVAC by CMS

HVAC Companies Using WordPress in the UK HVAC Companies Using Wix in the UK HVAC Companies Using Squarespace in the UK HVAC Companies Using Duda in the UK

Related directories

Most-Used CMS by UK Companies (2026)CMS Used by UK B2B Companies: Market Share (2026)CMS Used by UK B2C Companies: Market Share (2026)CMS Used by UK Field Services Companies: Market Share (2026)CMS Used by UK Construction Companies: Market Share (2026)HVAC in the UK

Frequently asked questions

What is the most-used CMS among UK HVAC companies?

WordPress is the most-detected CMS among UK HVAC companies, with 75.2% share (1,890 of 2,514 companies with a detectable system), ahead of Wix (10.5%) and Squarespace (4.3%).

How many UK HVAC companies have a detectable CMS?

2,514 of 24,483 actively-trading UK HVAC companies (10.3%) have a CMS detectable from their public website. The remainder either run systems with no public web footprint or none at all, so detected share figures are a conservative floor.

What is a CMS?

A CMS is the system used to create, edit and publish a company website without changing the underlying code for every page. For UK HVAC companies, it is the layer behind service pages, contact routes and other content that has to be kept current as the business changes.

How is CMS usage detected?

Firmbase crawls the public website of every actively-trading company in this scope and fingerprints the technologies present — scripts, widgets, booking and checkout flows. A company is attributed to a system when that system's signatures are found; systems with no public web footprint are not attributable, which is why every share figure on this page means share of companies with a detectable system.

Which has more UK HVAC companies, WordPress or Wix?

WordPress: 1,890 detected companies versus 265 for Wix, of the 2,514 UK HVAC companies with a detectable CMS.

What is the best CMS for UK HVAC companies?

This page publishes observed CMS usage, not recommendations, so it should not be read as a ranked buying guide. WordPress leads every employee band: Under 10 employees has 1,717 companies and a 74.0% WordPress share; 10–50 employees has 734 companies and a 77.0% WordPress share; Over 50 employees has 63 companies and an 85.7% WordPress share.

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