On-demand Systems
On-demand Systems | Tankless Water Heater Install | Plumbing | Loudon
Imagine never running out of hot water during a chilly Loudon morning shower or while tackling a mountain of dishes after family dinner. HEP’s on-demand systems bring that luxury home, delivering a constant stream of perfectly heated water only when you need it—so you save energy, money, and precious storage space. Our local, licensed plumbers handle every detail, from removing bulky traditional tanks to fine-tuning gas, electric, or propane connections for maximum efficiency and safety.
When you schedule a tankless water heater install with HEP, you get more than cutting-edge equipment—you get the confidence of 24/7 emergency support, upfront pricing, and workmanship backed by solid guarantees. We arrive on time, respect your property, and leave you with a sleek, wall-mounted unit ready to power endless showers, spotless dishes, and lower utility bills for years to come.
FAQs
What advantages does a tankless (on-demand) water heater offer over a traditional storage tank for Loudon homeowners?
Tankless units heat water only when you open a tap, eliminating standby heat loss and typically cutting water-heating energy use by 20–40 %. They mount on a wall, freeing up floor space, and last 18–20 years—about twice the life of a tank. Because the water is not stored, you also greatly reduce the risk of leaks and tank corrosion. Many Loudon residents appreciate the endless hot-water supply for back-to-back showers or large soaking tubs.
Can a tankless water heater be retrofitted to the existing plumbing and gas/electrical service in my Loudon home?
In most cases, yes. Our technicians inspect the incoming gas line, venting route, electrical service (for electric or ignition), and water piping. Older homes may require a gas line upsizing to ensure the 120–199 kBtu/hr flow that many natural-gas tankless models need. If you have propane, we check tank capacity and regulator size. Electric units may call for one or more 40- to 60-amp breakers. We handle all local permitting and adhere to Loudon County and Tennessee mechanical codes.
How do I determine the correct size (flow rate) for a tankless water heater?
Sizing is based on simultaneous demand (gallons per minute, GPM) and the temperature rise from incoming water to desired hot-water set-point. In Loudon, groundwater averages 55–60 °F. To reach 120 °F you need about a 60 °F rise. Add up GPM for appliances you might run at once—for example, 2.5 GPM shower + 1.0 GPM kitchen tap = 3.5 GPM. We recommend a 7–9 GPM gas unit for most three-bath homes and a 4–6 GPM electric unit for small households. Our consultation includes a detailed load calculation so you never run out of hot water.
What is the typical installation timeline and what should I expect on the day of service?
A straightforward replacement takes 4–6 hours. Complex retrofits—gas line upsizing, new vent chase, or electric service upgrade—may extend to a full day. We arrive with drop cloths, shut off utilities, drain the old tank, mount the tankless unit, install isolation valves, run venting (or outdoor direct-vent termination), pressure-test all connections, and flush the heat exchanger. Before we leave, we program the temperature, register the warranty, and show you how to use and maintain the unit.
How much does a tankless water heater installation cost in the Loudon area, and are there rebates?
Installed prices generally range: • Gas tankless (mid-efficiency): $2,200–$2,800 • Gas tankless (high-efficiency, condensing): $3,000–$3,800 • Whole-house electric tankless: $1,800–$2,600 (service-panel upgrade may add costs) Tennessee Valley Authority (TVA) often offers $200–$400 rebates for ENERGY STAR® tankless units, and federal tax credits of 30 % up to $600 apply to eligible high-efficiency models through 2032. We file all rebate paperwork for you and accept major credit cards and 0 % financing (subject to approval).
What maintenance does a tankless water heater require after installation?
Annual service is recommended: flush the heat exchanger with a 50/50 white-vinegar solution for 45 minutes to remove mineral scale, clean the inlet filter screen, and check the venting and condensate line. Loudon’s water is moderately hard (about 120 ppm), so scale control is important. We offer a low-cost maintenance plan that includes the flush, a full safety inspection, and firmware updates. With proper care, your tankless heater should deliver reliable, efficient hot water for two decades.