Tankless Water-heater Installs
Tankless Water-heater Installs | Plumbing | Greenback
Imagine endless hot water flowing the moment you turn the tap, no bulky tank devouring closet space, and monthly energy bills that finally make sense. HEP’s certified technicians bring that reality home to Greenback with swift, spotless tankless water-heater installs. We size the unit to your family’s habits, reroute gas or electric lines for peak efficiency, and wrap up the job so cleanly you’d never guess we’d re-engineered your whole water system—except for the satisfying steam rising from your next shower.
Behind the scenes, our team treats every connection, vent, and valve as a long-term investment in your comfort. From the first on-site evaluation to testing the final fixture, you can trust HEP’s deep-rooted expertise in plumbing and our 24/7 support to keep that endless hot-water promise alive for years to come. Ready to trade the tank for a smarter solution? Let’s schedule your install today and turn hot water into one less thing to worry about.
FAQs
What advantages does a tankless water heater offer Greenback homeowners compared with a traditional tank?
Tankless units heat water on demand, so you never run out of hot water, even during back-to-back showers. Because there is no storage tank continually reheating 40-50 gallons, you can cut water-heating energy use by 20–40 %. Tankless models are also far smaller, freeing up floor space, and they typically last 18–20 years—almost twice the life expectancy of a standard tank. In Greenback’s mild climate, incoming water temperatures are moderate, allowing the heater to reach set temperature with less fuel, which further improves efficiency.
How does the installation process work, and how long will my home be without hot water?
After a free in-home assessment, we pull any required Greenback or Loudon County permits and schedule a convenient installation date. On installation day we: 1) drain and remove the old tank, 2) mount the new tankless unit on an exterior or interior wall, 3) run venting (for gas models) or upgrade wiring (for electric models) as needed, 4) connect water, gas, and/or electrical lines, and 5) run and test the system. Most jobs take 6–8 hours, meaning you are typically without hot water for only part of one business day. Complex retrofits that require gas-line upsizing or panel upgrades may run into a second day, but we’ll let you know in advance.
What size or capacity tankless water heater do I need?
Sizing is based on simultaneous demand, measured in gallons per minute (GPM), and the temperature rise between incoming groundwater and your desired outlet temperature. In Greenback, groundwater averages 55–60 °F. For a 120 °F shower, you need a 60–65 °F rise. Add up the GPM of the fixtures you plan to use at once (e.g., shower 2.0 GPM + dishwasher 1.5 GPM = 3.5 GPM). We match that total to a heater that can deliver a 60 °F rise at or above 3.5 GPM—usually a 160–199 k BTU gas unit or a 27 kW electric unit for a three-bath home. Our technician will calculate this precisely during your assessment.
Will a tankless water heater really lower my utility bills in Greenback?
Yes. ENERGY STAR® studies show gas tankless units save the average household $95–$150 a year and electric models save $40–$60 by eliminating standby losses. Savings vary with usage habits and local energy costs, but Greenback’s moderate groundwater temperature means your unit does not have to work as hard as in colder regions, boosting efficiency. In addition, TVA and local gas providers occasionally offer rebates—ask us for current incentives when we quote your project.
Do I need to upgrade my gas or electrical service before installation?
Maybe. High-output gas tankless heaters require ¾-inch gas lines and venting with category III or IV stainless steel. Many 199 k BTU models also need a 120 V outlet for the control board and fan. Electric whole-house units demand 100–120 amps of dedicated 240 V breakers, which may exceed older 150-amp service panels. During our site visit we measure gas line capacity, check meter sizing, and inspect your electric panel. If upgrades are necessary, we include that work in your written estimate so there are no surprises.
How often does a tankless water heater need maintenance, and do you offer service plans?
Tankless systems are low maintenance but not maintenance-free. Because Greenback’s water is moderately hard (6–7 grains per gallon), we recommend an annual flush with a food-grade vinegar solution to remove scale from the heat exchanger, plus cleaning the inlet filter and checking the burner or heating elements. This 45-minute service protects efficiency and preserves the manufacturer’s warranty. We offer an affordable maintenance plan that includes the yearly flush, priority scheduling, and a 10 % discount on any additional plumbing repairs.