AC Installation in Irmo
Get fast, fair pricing from licensed local pros. Typical Irmo cost: $3.5k – $7k+ installed.
- Central AC (replace)
- $3.5k – $7k+
- New central AC + ducts
- $5.3k – $11.5k+
- Ductless mini-split
- $2.6k – $7k
- Permit & inspection
- $65 – $350
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AC installation cost by system.
Installed pricing for Irmo, adjusted for local labor. Higher SEER2 tiers, larger tonnage, and new ductwork add to the base.
In Irmo, SC, AC installation costs reflect the local housing stock and climate. With a median home age of 43 years, many homes need like-for-like central AC replacements, typically ranging from $3,500 to $7,000+. New systems with ductwork can run $5,300–$11,400+, while ductless mini-splits and heat pumps span $2,600–$10,500+. South Carolina requires a mechanical permit for AC installation, and the state enforces the IECC-based energy code with a hot-humid focus. Given the high cooling demand and heat-pump adoption, a heat pump is often a strong fit, and the federal 25C tax credit can offset up to $2,000 for qualifying heat pumps or $600 for high-efficiency AC units.
- Central AC, like-for-likeExisting ducts in good shape$3,500 – $7,000+
- New central AC + ductworkFirst-time or full duct replacement$5,300 – $11,500+
- Ductless mini-splitSingle or multi-zone, no ducts$2,600 – $7,000
- Heat pump (cooling + heating)Qualifies for federal & local rebates$4,400 – $10,500+
- Permit & inspectionRequired in most jurisdictions$65 – $350
* High-efficiency systems cost more upfront but may qualify for federal tax credits and utility rebates.
Pricing reviewed · Local data from U.S. Census ACS
HVAC systems in Irmo
U.S. Census ACS- Households
- 4,674
- Homeowners
- 3,690
- 73% own
- Median home value
- $168,200
- Median income
- $77,656
- Median home built
- 1983
- Housing units
- 5,037
With a median home built in 1983, many Irmo AC and furnace systems are at or past their 12–15 year lifespan — a common reason replacements spike here.
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What’s different about Irmo.
Generic cost pages skip the things that actually decide your price and which system fits here — local code, climate, and the money you can claim back.
Recommended unit for Irmo
Given South Carolina’s hot-humid climate and heat-pump heating, high-seer2 heat pump is the sensible default for most Irmo homes. With a long, hard cooling season here, stepping up the SEER2 tier pays back through lower summer bills. A pro can confirm the right size and system for your home with a load calculation.
Sources: Dominion Energy SC Heating and Cooling Rebates · Duke Energy HVAC Replacement Rebate · EIA South Carolina Electricity Profile
What Irmo code requires
Installing or replacing an HVAC system in Irmo follows South Carolina rules under the state mechanical code. Here’s what applies statewide:
- PermitRequired
Mechanical permit pulled by your licensed HVAC contractor; covers equipment, refrigerant, and the electrical disconnect.
- SEER2 minimum14.3 SEER2 (Southeast)
Federal Southeast-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.
- Load calculationRecommended
Sizing by load calc — not rule of thumb — prevents an oversized unit that short-cycles and never dehumidifies.
- RefrigerantR-454B / R-32 (R-410A phased down 2025+)
- Good to know—
South Carolina enforces the IECC-based state energy code with a hot-humid focus; high heat-pump adoption means electric-strip backup sizing and humidity control matter more than cold-climate concerns.
Sources: Dominion Energy SC Heating and Cooling Rebates · Duke Energy HVAC Replacement Rebate · EIA South Carolina Electricity Profile
Not sure which rules and rebates apply to your home?
A licensed Irmo pro will walk you through code, the right unit, and what you can claim back — in one quick call.
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Money back in Irmo
South Carolina heating is mostly heat-pump, which shapes the money back:
- State$400-$1,000 (up to $650 for electric furnace to heat pump)Dominion Energy SC - Heating & Cooling Rebates (ENERGY STAR heat pump) →
State or utility program — verify eligibility before you buy.
- State$500-$1,000 (heat pump replacement; requires Home Energy Check)Duke Energy SC - HVAC Replacement / Home Energy Improvement rebates →
State or utility program — verify eligibility before you buy.
- Federal30% of cost, up to $2,000Federal 25C tax credit — heat pump →
For a qualifying ENERGY STAR heat pump meeting the CEE efficiency tier. Claimed on your federal return.
The federal 25C tax credit (30%, up to $2,000 for a qualifying heat pump and up to $600 for a high-efficiency central AC) applies in every state, including South Carolina.
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- 1
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- 2
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- 3
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AC Installation in Irmo, explained.
What Affects AC Installation Cost in Irmo
Prices vary based on system type (central AC vs. heat pump vs. mini-split), existing ductwork condition, and home size. Older homes may require duct modifications or load calculations. Permits and code compliance add to costs. Efficiency choices (SEER2 ratings) and refrigerant type (R-454B or R-32) also influence pricing. Labor rates reflect local market conditions.
Common AC Installation Issues in Irmo
Aging Ductwork
Many Irmo homes built in the 1980s have undersized or leaky ducts, requiring repairs or replacement during AC installation.
Permit and Code Compliance
South Carolina requires a mechanical permit; failing to pull one can lead to fines or issues during home sales.
Humidity Control
Irmo's hot-humid climate demands proper system sizing and dehumidification to prevent mold and discomfort.
AC Installation FAQs — Irmo
Yes, South Carolina requires a mechanical permit for AC installation. A licensed contractor typically handles the permit process.
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