Tankless Water-heater
Tankless Water-heater | Plumbing | Greeneville
Experience endless hot water and lower energy bills with HEP’s cutting-edge tankless solutions right here in Greeneville. Our certified technicians swap out bulky tanks for sleek, on-demand units that heat water only when you need it, freeing up space and trimming monthly costs. Whether you’re upgrading a busy family home or a cozy mountain cabin, we tailor each installation to your household’s flow rate, fuel type, and budget—so you get perfect temperatures every time you turn on the tap.
From the first consultation to final inspection, HEP handles every step with precision plumbing expertise and hometown courtesy. We arrive on schedule, protect your property with drop cloths and shoe covers, and back our workmanship with industry-leading warranties. Ready to future-proof your hot water supply? Call or click today and see why Greeneville homeowners trust HEP for comfort that never runs cold.
FAQs
How does a tankless water heater work compared to a traditional tank in Greeneville homes?
A tankless, or “on-demand,” water heater heats water only when a hot-water tap is opened. Cold water passes through a high-efficiency heat exchanger—either gas-fired or electric—which raises the water to the set temperature within seconds. Because it does not store 40–50 gallons of hot water, it eliminates standby heat loss that occurs with traditional tanks. For Greeneville residents, this means steady hot water even during long showers and lower energy bills due to reduced heat loss.
Will a tankless unit really save me money on utilities in Greeneville, TN?
Yes. ENERGY STAR® estimates gas tankless units save an average household 25–35 % on water-heating costs. In Greeneville, where winters can push water-heater demand higher, the savings can be even greater because the unit fires only when you actually need hot water. Local natural-gas rates are lower than the national average, so a high-efficiency gas tankless model usually pays for itself in 5–7 years through utility savings. You may also qualify for TVA energy-efficiency rebates or a federal tax credit of up to 30 % of the installed cost (consult your tax advisor).
What size (flow-rate) tankless water heater should I choose for my household?
Sizing is based on peak hot-water demand measured in gallons per minute (GPM) and the required temperature rise. In a typical Greeneville home you might run a shower (2.0 GPM) and a washing machine (2.5 GPM) at the same time, so you’d need at least 4.5 GPM. Because Greeneville’s incoming winter water temperature can dip to about 50 °F, a 70 °F rise is required to reach 120 °F. Most families of 3–4 do well with a 7–9 GPM gas unit or an 18–27 kW electric model. Our technicians perform a free on-site assessment to confirm the exact model that matches your fixtures and lifestyle.
Can a tankless water heater be retrofitted into my existing plumbing and venting?
In most cases, yes. For gas units we verify gas-line capacity (a ¾-inch line is often needed) and add stainless-steel or PVC direct venting to meet Greene County Building Code. Electric models require a 150–200 amp service panel and dedicated breakers. Water lines connect to the same hot and cold feeds as your old tank, and we usually install a scale-reduction filter to address Greeneville’s moderately hard water. The entire retrofit typically fits in a space half the size of a conventional tank, freeing up valuable square footage.
How long do tankless water heaters last and what maintenance do they need?
A quality tankless water heater has a life expectancy of 20–25 years—roughly double that of a storage tank. Annual maintenance is simple: we flush the heat exchanger with a vinegar solution to remove mineral scale, inspect the burner or heating elements, and clean the inlet filter. Greeneville’s hardness averages 6–8 grains per gallon, so descaling once a year keeps efficiency and warranty intact. Many manufacturers provide 12- to 15-year warranties on the heat exchanger when professional maintenance records are kept.
What is the installation timeline, and how long will my water be off?
A straightforward replacement of a gas tank takes about 6–8 hours: morning removal of the old unit, mid-day venting and gas-line upgrades, and afternoon commissioning of the new tankless heater. Your water is typically off for 2–3 hours during the changeover. For electric models, add 1–2 hours if panel upgrades are required. We schedule inspections with Greeneville’s building department and handle all permits, so you have hot water the same day with no paperwork hassles.