High–efficiency Models

High–efficiency Models | Tank Water Heater | Plumbing | Charleston

Enjoy endless hot water without the endless utility bills. HEP’s high-efficiency models are engineered for Charleston’s coastal climate, blending robust corrosion resistance with cutting-edge insulation and smart controls. Our licensed technicians size and install each tank water heater for maximum performance, so you get rapid recovery, lower operating costs, and peace of mind backed by industry-leading warranties.

From the first consultation to the final temperature check, we handle every detail—permits, haul-away, and routine maintenance reminders—so your upgrade feels effortless. Schedule today and discover why homeowners across the Lowcountry trust HEP to turn an ordinary water heater replacement into a streamlined, energy-saving experience.

FAQs

What makes a tank water heater “high-efficiency” and how is it different from a standard unit?

High-efficiency (HE) tank water heaters use advanced heat exchangers, thicker insulation, and electronic ignition systems to achieve an Energy Factor (EF) or Uniform Energy Factor (UEF) at least 10–15 % higher than standard models. This means they convert more of the fuel they consume into hot water, reducing wasted energy and lowering operating costs. Many HE units in the Charleston market are ENERGY STAR® certified, indicating they meet or exceed rigorous federal efficiency guidelines.

How much can I expect to save on utility bills in Charleston with a high-efficiency tank water heater?

Savings depend on your hot-water usage, energy rates, and the efficiency difference between your current heater and the new model. On average, Charleston homeowners who switch from a 0.58 UEF gas tank to a 0.70–0.72 UEF high-efficiency gas tank report annual gas savings of 10–20 %, or roughly $40–$100 per year at current SCE&G natural-gas rates. Electric HE units can save 15–30 % compared with older electric tanks, amounting to $60–$150 per year. Over a 10- to 12-year lifespan, these savings generally offset the higher purchase price and installation cost.

Are rebates or tax incentives available in the Charleston area for upgrading to a high-efficiency water heater?

Yes. Dominion Energy South Carolina currently offers rebates of $150–$400 for qualifying ENERGY STAR® natural-gas tank water heaters and up to $700 for heat-pump (hybrid electric) water heaters. Federal tax credits under the Inflation Reduction Act (extended through 2032) allow up to 30 % of project cost, capped at $600 for gas or $2,000 for heat-pump models. Local plumbers can file the paperwork for you, and we’ll supply model and AHRI certificates needed to claim both the utility rebate and federal credit.

How do I determine the correct size high-efficiency tank water heater for my household?

The key sizing metric is First-Hour Rating (FHR)—how many gallons of hot water the unit can deliver in the busiest hour. For Charleston households: • 1–2 people: 40-gallon HE gas or 50-gallon HE electric (FHR 50–60 gal) • 3–4 people: 50-gallon HE gas or 65-gallon heat-pump electric (FHR 70–80 gal) • 5+ people or multiple bathrooms: 65- or 75-gallon HE gas (FHR 90+ gal) A quick rule: add 10 gallons if you have a soaking tub or high-flow rain shower. Our technicians perform a usage audit and recommend a model that balances capacity with energy efficiency so you never run out of hot water yet avoid paying to heat more water than you need.

What is involved in replacing my existing water heater with a high-efficiency model?

Most replacements are completed in one visit. Steps include: 1. Drain and remove the old tank. 2. Bring the installation area up to current code—seismic strapping, drip pan, and expansion tank if required. 3. Install the HE unit, connect water, gas or electric, and secure proper venting. HE gas models often need 3- or 4-inch PVC power-venting rather than metal flue; we handle ducting through the roof or side wall. 4. Insulate hot-water piping to preserve efficiency. 5. Test for leaks, verify combustion or electrical safety, and set the thermostat (120 °F is recommended in Charleston to curb scalding and reduce energy use). Typical downtime is 3–5 hours, and we haul away the old unit for environmentally responsible recycling.

How much maintenance do high-efficiency tank water heaters need and what kind of warranty comes with them?

Maintenance is straightforward: flush the tank once a year to remove Lowcountry sediment, inspect the anode rod every 2–3 years, clean the air filter on heat-pump units, and test the T&P valve. These tasks keep efficiency high and help the unit reach its full 10- to 15-year service life. Most manufacturers provide a 6- or 10-year limited parts tank warranty, with optional labor-coverage extensions. We include the first annual flush at no charge and offer affordable service plans that satisfy warranty requirements and give you priority scheduling if repairs are ever needed.