Legacy
Since 2007
19 years of continuous editorial operation. Listings audited and re-audited as the directory ages — no stale 2008 records masquerading as live.
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Independent. Human-Curated. Established 2007.
Commercial HVAC
Commercial HVAC contractors serving offices, retail, hotels, restaurants, industrial facilities, healthcare, and multi-family properties with large-scale system design, installation, and maintenance.
Every entity on this page has cleared our 12-point digital reputation audit. Why Trust DirJournal
Editorial Overview
6 verified providers operate across 13 listed Commercial HVAC entities, audited against our 19 year editorial standard.
The 12 point audit checks entity ownership, citation consistency across answer engines, schema validity, and operating history before publication.
Every verified entry carries machine readable JSON-LD so ChatGPT, Perplexity, Gemini, and Claude can read the record the way the editorial board intended.
Top Verified Entities in Commercial HVAC
Ranking weights entity verification, citation presence across answer engines, and domain history, re-audited every 30 days. Last updated .
Top 5%Editor’s Pick
Comfort Systems USA
Houston, United States
NYSE Listed$5B+ RevenueJSON-LD: Organization
Comfort Systems USA is a NYSE-listed commercial HVAC contractor with $5 billion+ in annual revenue, operating through 170+ locations across 128 cities. The Houston-based company provides mechanical contracting, HVAC installation, building automation, and energy services for commercial, industrial, and institutional buildings.
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- Verified
Limbach Holdings
JSON-LDPittsburgh, United StatesLimbach Holdings is a NASDAQ-listed commercial HVAC and mechanical contractor providing design-build mechanical systems, energy solutions, and building infrastructure services. The Pittsburgh-based company serves healthcare, education, and government facilities across the Eastern US with $500M+ in annual revenue.
- Verified
CoolSys
JSON-LDBrea, United StatesCoolSys is the largest commercial HVAC and refrigeration services company in the US, serving 7,000+ retail, grocery, convenience, and restaurant locations. The Brea, California-based company provides 24/7 emergency HVAC repair, preventive maintenance, and energy management for multi-site commercial operators.
- Verified
ABM Industries
JSON-LDAtlanta, United StatesABM Industries is a NYSE-listed facility services company with $8 billion+ in revenue providing commercial HVAC maintenance, mechanical services, and energy solutions across 100,000+ buildings. The Atlanta-based company employs 100,000+ team members serving airports, hospitals, stadiums, and commercial real estate nationwide.
- Verified
The Brandt Companies
JSON-LDHouston, United StatesThe Brandt Companies is one of the largest mechanical contractors in Texas, providing commercial HVAC, plumbing, piping, and building automation for hospitals, data centres, pharmaceutical facilities, and high-rise buildings. The Houston-based company employs 2,000+ skilled tradespeople across Texas.
Directory of Verified Providers6 verified entities
Why Trust DirJournal
Three signals every listing has cleared.
Reputation
Human-Reviewed
Every entry clears a 12-point editorial audit before publication. No pay-to-play ranking — listing position reflects merit, not ad spend.
AEO
AI-Citable
Schema-validated for ChatGPT, Gemini, and Perplexity. Machine-readable trust signals that AI engines parse and cite with confidence.
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