Compare the highest-rated hvac professionals in Johnston, South Carolina. All contractors are licensed, insured, and verified through our rigorous screening process.
A full-service HVAC contractor specializing in high-efficiency system installations and 24/7 emergency repairs. Known for expertise in handling the region's high humidity levels and providing comprehensive ductwork diagnostics and sealing services.
Family-owned HVAC company offering premium installation, maintenance, and repair services. They specialize in energy-efficient upgrades and work with top brands like Trane and Carrier. Their maintenance plans are specifically tailored to the long cooling season demands of the Johnston climate.
Reliable local contractor providing comprehensive HVAC services with a strong focus on repair and emergency response. They offer honest diagnostics and specialize in both residential and light commercial systems, with expertise in older system repairs and modern replacements.
Johnston, SC experiences a humid subtropical climate with hot, humid summers and mild winters. This creates significant demand for reliable air conditioning, dehumidification, and ventilation services for most of the year, with a shorter but crucial heating season. The local HVAC market is competitive with several well-established contractors. Homeowners prioritize system reliability, energy efficiency to combat high summer utility bills, and contractors who can provide quick emergency service during peak summer heat. Proper ductwork sealing and insulation are also critical due to high humidity levels.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Johnston regulations and climate
Get answers to common questions about hvac services in Johnston, South Carolina.
For a full system replacement (air conditioner and furnace or heat pump) in Johnston, costs typically range from $6,500 to $12,000+, depending on system size, efficiency rating, and home complexity. South Carolina's hot, humid summers mean investing in a properly sized, high-SEER air conditioner (16+) is crucial for efficiency and comfort. Always get itemized estimates from local, licensed contractors that include removal of the old unit, new ductwork modifications if needed, and a 10-year parts warranty.
The ideal times are during the mild shoulder seasons of early spring (March-April) and early fall (September-October). Scheduling service then avoids the peak summer demand when HVAC companies are busiest with emergency breakdowns in the 90°F+ heat, ensuring you get more appointment options and potentially better pricing. This timing also ensures your system is fully tuned and reliable before the intense Johnston summer humidity arrives.
While Johnston follows South Carolina state codes, which require HVAC contractors to be licensed, there are no unique local town ordinances for residential installations. However, you should always verify a contractor holds a valid SC Mechanical Contractor license. For rebates, check with Palmetto Electric Cooperative, which serves the Johnston area, for potential incentives on high-efficiency heat pumps or air conditioners, and always inquire about federal tax credits for ENERGY STAR® qualified systems.
Prioritize local companies with a long-standing physical presence in Edgefield County or the CSRA. Verify their SC Mechanical Contractor's license online via the SC Department of Labor, Licensing and Regulation (LLR), and ensure they carry both liability and workers' compensation insurance. Ask for references from homes of similar age in Johnston, as older homes may have unique ductwork or insulation challenges, and choose a provider that performs a detailed Manual J load calculation to correctly size your new system.
Given Johnston's summer climate with high temperatures and extreme humidity, it is common for systems to run frequently, especially during the afternoon peak. However, if it runs non-stop without adequately cooling or dehumidifying, it may be undersized, low on refrigerant, or have a failing component. Persistent high humidity inside can also indicate an oversized system that short-cycles. A local technician can assess if your system is properly matched to your home's load and the local climate.