HVAC Replacement Cost in Myrtle Beach, SC
Replacing a heat pump or AC system in Myrtle Beach involves more than picking a size off a chart; coastal corrosion, humidity control, and hurricane exposure all factor into what equipment makes sense here. This guide covers real-world replacement costs and complements the Myrtle Beach HVAC hub and our AC repair cost guide. When you're ready to compare quotes, get matched with a vetted local contractor.
By Homeowner Henry · HVAC · Published September 17, 2026 · 10 min read
Why heat pumps dominate replacement projects here
Because Myrtle Beach winters rarely require serious heating capacity, most replacement projects along the Grand Strand install heat pumps rather than a furnace-and-AC combination. A heat pump provides both heating and cooling from one outdoor unit, which simplifies equipment and can lower total installed cost compared to a two-system setup.
When comparing quotes, make sure every contractor is pricing the same category of equipment. A quote for a straight AC condenser paired with electric resistance heat strips will look cheaper than a true heat pump quote but performs very differently and typically costs more to run in winter.
Typical replacement costs by system type
A standard-efficiency 3-ton heat pump replacement, common for a mid-size single-family home, generally runs $6,500 to $9,500 installed. Moving up to a high-efficiency, coastal-rated system with a corrosion-resistant coil coating and variable-speed components typically runs $9,500 to $14,000.
Condos and smaller units often use ductless mini-split systems, especially where running new ductwork isn't practical; a single-zone mini-split installation typically runs $3,000 to $5,500, with multi-zone systems for larger condos scaling up from there depending on the number of indoor units.
Coastal-specific factors that change your quote
Ask specifically whether a proposed system includes a coastal or marine-grade coil coating; many manufacturers offer this as a factory option, and it's a reasonable request for anything installed within a few miles of the ocean. It usually adds a modest amount to the equipment cost but can meaningfully extend the life of the outdoor unit.
Contractors serving the Grand Strand should also perform a proper Manual J load calculation rather than sizing based on the old unit's tonnage alone, since humidity control needs here often call for different sizing than a simple square-footage estimate would suggest. Oversized systems short-cycle and leave homes feeling humid even when the temperature reads comfortable.
Permits and inspections for a replacement
A full system replacement inside Myrtle Beach city limits requires a mechanical permit through the City's Construction Services Department, and only a state-licensed mechanical contractor with a City business license and trade card can obtain it 2. Properties in unincorporated Horry County go through the county's permitting process instead.
A legitimate contractor will include the permit fee in your written estimate and schedule the required inspections; be cautious of any quote that's noticeably lower because it skips permitting, since that can create problems later with insurance claims or when selling the home.
Financing, rebates, and timing your replacement
Many local contractors offer financing plans for full replacements, and it's worth asking about manufacturer rebates on qualifying high-efficiency equipment, which change periodically. Check with your electric utility as well, since rebate programs for qualifying heat pumps are sometimes available and vary by provider.
Scheduling a replacement in spring or fall, ahead of peak summer demand and hurricane season, generally gives you more contractor availability and time for a proper install rather than an emergency swap during a heat wave.
Comparing multiple quotes properly
Get at least two to three written quotes, and make sure each one lists the same details: equipment brand and model, SEER2 rating, warranty terms, whether ductwork is included or needs modification, and whether the permit fee is included. Quotes that vary widely often reflect different equipment tiers rather than one contractor simply being more expensive.
For help vetting the contractors themselves, see our guide on how to choose an HVAC contractor in Myrtle Beach.
Typical cost ranges
| Ductless mini-split (single zone) | $3,000 - $5,500 |
| Ductless mini-split (multi-zone, 3 heads) | $8,000 - $13,000 |
| Heat pump replacement (3-ton, standard efficiency) | $6,500 - $9,500 |
| Heat pump replacement (high-efficiency, coastal-rated) | $9,500 - $14,000 |
| AC-only system replacement (with existing furnace/heat strips) | $5,500 - $8,500 |
| Full ductwork replacement | $3,500 - $8,000 |
| Mechanical permit fee (city or county) | $75 - $300 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
How long does a heat pump last near the Myrtle Beach coast?
Standard systems often last 10 to 12 years near the coast versus 15 or more inland, due to salt-air corrosion, unless coastal-rated equipment and regular maintenance are used.
Is a heat pump enough for the occasional cold night in Myrtle Beach?
Yes, a properly sized heat pump handles the area's mild winters without needing a separate furnace, though some systems include backup electric heat strips for the coldest snaps.
Do I need a permit to replace my HVAC system?
Yes, both the City of Myrtle Beach and Horry County require mechanical permits for full system replacements, obtainable only through a licensed mechanical contractor.
What's the benefit of a coastal-rated system?
Coastal-rated equipment includes coil coatings and corrosion-resistant components designed to hold up longer against salt air, extending equipment life near the beach.
How much does ductwork replacement add to the cost?
Full ductwork replacement typically runs $3,500 to $8,000 separately from the equipment cost, depending on home size and duct accessibility.
Are there rebates for high-efficiency HVAC systems in South Carolina?
Some manufacturer and utility rebate programs exist for qualifying high-efficiency equipment; check current offers with your utility provider and the contractor at time of purchase.
Should condo owners get a different type of system than houses?
Condos often use ductless mini-splits or smaller packaged units due to space constraints, while single-family homes more commonly use full ducted heat pump systems.
How do I compare quotes that seem very different in price?
Check that each quote lists the same equipment tier, SEER2 rating, warranty, and whether permit fees and ductwork work are included before comparing prices directly.
Want real numbers for your own project?
Two minutes now beats a week of no cooling. Free, no obligation, never more than three HVAC contractors.
Get My Free HVAC QuotesLocal cost ranges, seasons, permits and licensing for this city live on the market page.
HVAC companies in Myrtle Beach, SCThe Henry Standard
Every HVAC contractor in our network agrees to three things.
Show up
Call back. Keep appointments. And if something changes, communicate it.
Quote honestly
Equipment, scope, permit, and price in writing — so you know what you're agreeing to.
Finish the work
See the job through, pull the permit, and pass inspection before calling it finished.
Nothing revolutionary. Just the way we believe doing business should still be done.