South Carolina (SC) Heat Pump Sizing Guide

South Carolina is in IECC Climate Zone 2 (Hot-Dry/Mixed), with approximately 2,300 cooling degree days and 2,500 heating degree days per year. The average electricity rate in South Carolina is $0.13/kWh, which directly affects heat pump operating costs and the payback period compared to a gas furnace.

South Carolina Heat Pump Data

Heat Pump Suitability for South Carolina

With 2,300 cooling degree days, South Carolina homeowners will use their heat pump primarily in cooling mode. A high-SEER unit (18+) will maximize savings. Heating needs are modest, so standard heat pump models work well without supplemental heating in most of South Carolina.

Heat Pump Incentives in South Carolina

South Carolina residents may qualify for the federal 25C tax credit of up to $2,000 for qualifying heat pump installations under the Inflation Reduction Act. Many South Carolina utilities offer additional rebates ranging from $300 to $3,000 for energy-efficient heat pump installations. Check the DSIRE database and your local utility's website for current South Carolina heat pump rebate programs. Some South Carolina municipalities also offer property tax exemptions or reduced permit fees for heat pump installations.

Sizing Recommendations for South Carolina

For a typical 2,000 sq ft home in South Carolina with average insulation, we recommend a 2.5-3 ton heat pump. At $0.13/kWh, annual operating costs will be significantly affected by equipment efficiency. Every point of SEER improvement reduces cooling costs by approximately 5-7%. Use our heat pump sizing calculator for a personalized recommendation based on your specific home details.

Use our calculator for personalized recommendations, or browse all states to compare data across the country.