- HEP Plumbing
- Tankless Water Heaters

Tankless Water Heaters
Tankless Water Heaters | Tankless Water Heater Install | Plumbing | Signal Mountain
Picture the freedom of endless hot water flowing through your Signal Mountain home—no bulky tank, no standby energy waste, just pure, on-demand comfort. HEP’s licensed plumbers specialize in compact, high-efficiency systems that mount neatly on the wall and slash utility costs from the moment they fire up. With decades of local experience, we know the mountain’s unique water conditions and tailor each unit to deliver whisper-quiet performance, rock-solid reliability, and the perfect temperature every time you turn the tap.
Our crew handles every step of your tankless water heater install, from precise sizing and gas-line upgrades to final code inspections and haul-away of the old tank. You’ll get transparent pricing, same-day service windows, and the peace of mind that comes with HEP’s satisfaction guarantee—so the only thing you’ll ever run out of is reasons to love your new hot water setup.
FAQs
What are the main advantages of installing a tankless water heater in my Signal Mountain home?
Unlike storage-tank models, tankless heaters produce hot water on demand, so you never “run out.” They also eliminate standby heat loss, cutting energy use by 20–40 percent, which can lower monthly utility bills. Their compact wall-mounted design frees up floor space, and life expectancy is 20+ years—roughly double that of a conventional tank. Finally, because Signal Mountain’s moderate climate keeps incoming water temperatures within a favorable range, tankless units operate very efficiently here year-round.
How long does a typical tankless water heater installation take?
Most residential replacements are completed in one day. A straightforward swap of a gas tank for a gas tankless unit usually requires 4–6 hours: 1–2 hours to remove the old heater, 1–2 hours to mount and connect the new unit, and another 1–2 hours for venting, gas line adjustments, start-up, and inspection. Projects that need a larger gas line, new vent path, or electrical upgrade may extend the job to a full 8-hour day or, rarely, a second visit. Our team schedules the Hamilton County permit and coordinates any required inspection so you have a single seamless appointment.
What size (GPM) tankless water heater do I need?
Sizing is based on simultaneous demand, not storage volume. First we total the flow rates (gallons per minute) of fixtures you might use at once—e.g., shower (2.0 GPM) + dishwasher (1.5 GPM) = 3.5 GPM. Next we calculate the temperature rise: in Signal Mountain, incoming water averages 55 °F; if you want 120 °F hot water, the rise is 65 °F. A family of four with two showers running at the same time generally needs a 7–9 GPM gas unit or a 5–7 GPM electric unit. We provide a free in-home evaluation and recommend the right model so you never experience a drop in pressure or temperature.
Are there rebates or incentives for tankless water heaters in Signal Mountain or Tennessee?
Yes. Many of our customers qualify for a $300 federal tax credit (25C) for ENERGY STAR® certified gas tankless units placed in service before 2032. EPB and TVA occasionally offer additional rebates—typically $100–$250—on high-efficiency electric models. Hamilton County’s Green Rebate Program also covers up to $50 of the permit fee for ENERGY STAR® installations. We’ll complete all rebate paperwork and provide the model and efficiency documentation you need to claim your incentives.
What maintenance does a tankless water heater require?
To keep warranty coverage intact and ensure peak efficiency, manufacturers recommend an annual service: flushing the heat exchanger with food-grade vinegar to remove mineral scale, cleaning the water and air filters, and checking burner calibration. Signal Mountain’s water is moderately hard—about 6–7 grains per gallon—so we advise flushing at least once a year; homes with hardness above 10 gpg should flush twice a year or add a scale-reduction filter. Routine maintenance takes about an hour and costs far less than repairing a scaled-up heat exchanger.
Can a tankless water heater work with my existing plumbing and utility connections?
In most cases, yes. The water lines tie into the same hot and cold pipes as your old tank. Gas models may need a larger ¾-inch gas line and Category III or IV stainless venting, which we can run through an exterior wall or the roof. Electric models require a dedicated 240-volt circuit, typically 40–60 amps per heating module; our licensed electricians can upgrade your panel if needed. Before work begins, we perform a load calculation, verify gas pressure or electrical capacity, and pull any required permits to ensure your new tankless system integrates safely with existing infrastructure.