71 / 100

BizScore

How we score
61
AI Visibility
57
AI Ready
—
AI Agent ReadinessNot audited yet
71
SEO Performance
100
Freshness
76
Google Rating
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Contact Information

  • Address
    9366 CharlestonCharleston Office:(843)-747-2900 Cullum holds licenses in the following areas: South Carolina – unlimited mechanical contracting license and unlimited general contracting license North Carolina – mechanical contractor license and plumbing license Georgia – mechanical contractor license and plumbing license Construction 3325 Pacific St North Charleston, SC 29418 (843) 554-6645 Corporate Office 3325 Pacific St North Charleston, SC 29418
    Charleston, SC 29412
  • Google Reviews
    3.8 out of 5 stars from 138 Google reviews

Location

About G&B Mechanical

G&B Mechanical is an air conditioning contractor in Charleston, SC. The business specializes in HVAC, plumbing, medical gas piping, and process piping projects for industrial and commercial clients. It holds an unlimited mechanical contracting license and an unlimited general contracting license in SC, along with mechanical contractor and plumbing licenses in North Carolina and Georgia. The company serves the Southeast region, with a rating of 3.80 based on 138 reviews.

The organization traces its roots to 1972 in Charleston, SC, when it was founded by Furman Cullum. Over the following decades, the company expanded its operations across the state. By 1999, its structure included specialized subsidiaries for construction and services. In 2023, the company formed Cullum Mechanical, LLC to continue its operations. The corporate headquarters in North Charleston spans 30,000 square feet, with an additional 18,000 square feet dedicated to project support, including sheet metal and pipe prefabrication facilities. The team provides design-build and design-assist services, managing mechanical contracts, budgeting, scheduling, and trade coordination. Plumbing projects include systems for processing plants, healthcare facilities, and commercial office buildings. HVAC services cover repairs, replacements, preventive maintenance, and retrofits for equipment such as RTUs, chilled water systems, split systems, heat pumps, and industrial ventilation systems. Preventive maintenance activities include coil cleaning, wire inspections, equipment checks, belt checks, filter changes, and refrigerant checks.

G&B Mechanical maintains an established track record built on a large base of customer reviews. This standing reflects the company's long history of providing mechanical construction and maintenance services in the Charleston area. The business continues to serve commercial and industrial clients with its specialized mechanical contracting capabilities.

Services:

  • HVAC Services
  • HVAC/R Process Piping
  • Mechanical Construction & Maintenance
  • Plumbing
  • Pre-Construction
  • Project Management

Score Summary

BizScoreAI scanned the website culluminc.com on June 17, 2026. G&B Mechanical has a BizScore of 71 out of 100. The website audit behind the SEO score ran on October 27, 2026.

  • AI Visibility61 out of 100
  • SEO71 out of 100
  • Google rating3.8 out of 5

AI visibility scan by category: AI Discovery 10 of 25 points, Structured Data 8 of 25 points, Content Readiness 28 of 30 points, AI Trust Signals 15 of 20 points.

Website audit sub-scores (out of 100): On-Page 73, Technical 99, Performance 67, Content 45.

Strengths: 8 checks passed. AI Crawler Access, AI Content Blocking, Organization Schema, Q&A Content, AI-Parseable Headings, Meta Description, About/Team Page, XML Sitemap.

Areas to improve: 4 checks. llms.txt (failed), FAQPage Schema (failed), Speakable Schema (warning), Author Signals (warning).

AI engine reads

Read by AI engines 5 times in the last 30 days.

Counted from AI crawler and assistant visits to this page, identified by user agent.

See the full AI visibility report for this business

Contact G&B Mechanical

AI Visibility Score

How visible is this business to AI-powered search engines

61 /100
AI Discovery
40/100
Structured Data
32/100
Content Readiness
93/100
AI Trust Signals
75/100

Ways to improve this score

llms.txt Missing
FAQPage Schema Missing
Author Signals Missing
AI Visibility Scores bySEOScanPRORun a free full audit

SEO Score

Technical SEO health and search engine optimization

71 /100
On-Page
73/100
Technical
99/100
Performance
67/100
Content
45/100

Ways to improve this score

Improve Content
Improve Performance
Improve On-Page

Local SEO Coverage

Directory presence and NAP consistency

— /100
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