- HEP Heat and Air
- Whisper-quiet Heat Pumps

Whisper-quiet Heat Pumps
Whisper-quiet Heat Pumps | HVAC Unit Replacement | Heating and Air Conditioning | Charleston
With Charleston’s sultry summers, salt-tinged breezes, and the occasional chilly snap, every home deserves a comfort system that can keep pace—quietly. HEP’s whisper-quiet heat pumps combine powerful heating and air conditioning performance with near-silent operation, so you can enjoy cool, dehumidified air in July and cozy warmth in January without the background hum. If your current system strains, rattles, or sends your energy bills soaring, an HVAC unit replacement with one of our advanced heat pumps is the simplest way to restore calm, efficient comfort.
Our licensed technicians make the switch seamless, handling everything from precise load calculations to eco-friendly disposal of your old unit. The result is a sleek, ENERGY STAR®-rated system that can cut your utility costs, improve indoor air quality, and boost your home’s resale value—all while whispering along at conversation-level decibels. Schedule your free in-home assessment today and discover why Charleston homeowners are choosing HEP for a quieter, smarter kind of comfort.
FAQs
How quiet are your whisper-quiet heat pumps compared to a traditional HVAC system?
Our premium variable-speed heat pumps operate as low as 55–58 dB(A)—about the volume of a soft conversation. Conventional single-stage outdoor condensers often run at 70–75 dB(A), so you’ll typically experience a 50–60 % reduction in perceived noise. Indoor air-handler blowers modulate down to a near-silent 25 dB(A), making the system ideal for Charleston’s dense historic neighborhoods where exterior and interior noise ordinances can be strict.
Will a heat-pump system provide reliable heating during Charleston’s occasional winter cold snaps?
Yes. Today’s cold-climate inverter heat pumps deliver 100 % of their rated heating capacity down to 17 °F and continue operating efficiently at −5 °F. Because Charleston’s average January low is about 43 °F, the unit rarely has to engage its optional back-up electric resistance strips. For extra peace of mind, we size each system using ACCA Manual J calculations and can integrate dual-fuel (heat-pump + gas furnace) operation if you prefer redundancy.
How long does an HVAC replacement usually take from removal to commissioning?
For most single-family homes we can complete removal of the old equipment, set the new heat-pump condenser, replace the indoor coil or air handler, run new line-sets, evacuate, pressure-test, and commission the system in one full day (about 6–8 hours). Larger homes, ductwork alterations, or attic installs may require a second day. We schedule the city permit inspection within 24 hours and register your manufacturer warranty before we leave.
What incentives or rebates are available in Charleston for installing a high-efficiency heat pump?
1. Federal Inflation Reduction Act (IRA) tax credit: up to 30 % of project cost, capped at $2,000, for ENERGY STAR® certified heat pumps (through 2032). 2. South Carolina rebate: Santee Cooper and Dominion Energy customers can claim $300–$700 per qualifying system, plus a $100 bonus for smart thermostat integration. 3. Charleston County Greenbelt loan programs: Low-interest financing for energy-efficiency upgrades. We handle all paperwork, provide AHRI certificates, and deduct utility rebates instantly from your invoice so you don’t have to wait for checks.
Does the salty, humid coastal air affect the lifespan of a heat-pump unit?
Coastal conditions can accelerate corrosion on outdoor equipment, but our recommended models include: (a) epoxy-coated aluminum micro-channel coils, (b) stainless-steel fasteners, and (c) marine-grade powder-coated cabinets. We also apply an extra anti-corrosion spray to the coil after installation. With routine maintenance—annual coil washing and a visual corrosion check—life expectancy remains 12–15 years, comparable to inland installations.
What maintenance is required to keep my new system running efficiently and quietly?
• Replace or wash return-air filters every 30–60 days during peak pollen and cooling seasons. • Schedule spring and fall tune-ups: we inspect refrigerant charge, clean coils, lubricate ECM blower motors, and update firmware. • Keep a 2-ft clearance around the outdoor unit and rinse it with a garden hose quarterly to remove salt spray. • Enroll in our Comfort Club plan: $18/month covers two visits, priority service, 15 % repair discount, and extends labor warranty from 1 to 5 years. Following these steps preserves efficiency, maintains whisper-quiet operation, and validates your 10-year parts warranty.