5 Commercial HVAC Contractors in Johns Island, SC
Top-Rated Commercial HVAC Contractors in Johns Island
Carney & Son 72 Degrees
“Every sampled review awards 5 stars, with 4 of 5 reviewers naming specific technicians, Jacob, Daniel, Ryan, and Clarice consistently recognized for patience…”
5 Star Charleston Johns Island
“Fourteen reviewers specifically mention technicians by name, with Christian and Zach receiving the most shoutouts for transparency and professionalism.…”
All Commercial HVAC Contractors (5 total)
American Mechanical Services
“All five-star reviewers describe emergency or urgent situations, with multiple accounts noting same-day or…”
Commercial HVAC Costs in Johns Island
Commercial system pricing in Johns Island. Actual costs vary significantly by building size and system type. Request a site-specific quote.
| Service | Low | Average | High |
|---|---|---|---|
Annual maintenance (per rooftop unit) Quarterly inspections | $500 | $1,000 | $2,000 |
Annual contract (small business, < 5K sqft) | $1,000 | $2,500 | $5,000 |
Annual contract (mid-size, 5K-25K sqft) | $3,500 | $6,500 | $10,000 |
Basic rooftop unit replacement | $6,500 | $10,000 | $15,000 |
Small business full system (< 5K sqft) | $8,000 | $16,000 | $25,000 |
Mid-size building (5K-25K sqft) | $25,000 | $50,000 | $80,000 |
Operating cost (per sqft annually) Utility + maintenance | $2 | $4 | $6 |
Prices reflect humid subtropical metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
Commercial HVAC in Johns Island, SC: What to Expect
Charleston's Lowcountry climate creates punishing demands for Commercial HVAC in Johns Island. Summer temperatures climb to 89 degrees while humidity hovers near 78 percent, pushing heat indices well past what the thermometer reads. Coastal moisture and sea breezes generate heavy latent cooling loads from May through September, and mild winters with 43 degree averages mean cooling dominates the service cycle year round. Salt air from the Atlantic accelerates equipment corrosion, making routine maintenance critical for systems near waterways. Five contractors serve this market, collectively earning a 4.9 average rating across nearly 1,300 reviews.
Annual service contracts for small businesses under 5,000 square feet range from $1,000 to $5,000, while mid size properties between 5K and 25K square feet typically fall between $3,500 and $10,000. Rooftop unit maintenance alone costs $500 to $2,000 per year. South Carolina requires contractors to hold a Mechanical Contractor license from the state's Licensing Board, a credential that separates qualified professionals from less experienced operators.
Customer feedback points to consistent strengths across the contractor pool. At Carney and Son 72 Degrees, reviewers repeatedly mention technicians Jacob, Daniel, Ryan, and Clarice by name, praising their patience and clear communication. Another company draws frequent mentions of Christian and Zach for transparency and professionalism. Positive reviews across multiple firms cite quick response times and turnaround, with the majority of sampled feedback awarding five stars.