A tankless water heater delivers hot water on demand — no tank to run out, no standby heat loss, and a lifespan nearly twice that of a traditional tank unit. Honey Bear Plumbing installs and services tankless water heaters throughout Knoxville and the surrounding area, and we help you take advantage of TVA EnergyRight rebates that can offset a significant portion of the cost.
Call (865) 284-2424 for a free estimate.
Tankless vs. Tank: Is It Right for Your Home?
Tankless water heaters are the right choice for most Knoxville homeowners — but not every home. Here's the honest breakdown:
Tankless is a good fit when:
- Your current tank heater is at end of life and you're replacing it anyway
- You have natural gas service and want lower operating costs
- Your household runs out of hot water with a standard tank (large families, multiple showers)
- You're remodeling and want to reclaim the space a tank occupies
- You want a unit that lasts 20+ years instead of 10–12
Stick with tank if:
- Your home uses propane only (tankless gas units have higher propane demand)
- Your gas line can't support the higher BTU draw of a tankless unit without upgrade
- Upfront cost is the primary concern (tank units cost less to install)
We give you an honest recommendation based on your home — not just what's more expensive.
TVA EnergyRight Rebates in Knoxville
TVA's EnergyRight program offers rebates for qualifying high-efficiency water heaters, including ENERGY STAR-certified tankless gas units. Knoxville Utilities Board (KUB) customers may be eligible for rebates that reduce the net installed cost significantly. We handle the documentation and help you submit the rebate.
Tankless Water Heater Brands We Install
We install and service all major brands including Navien, Rinnai, Rheem, Noritz, and Bradford White. We recommend units sized for your home's peak demand — not just the cheapest option that might struggle during high-use periods.
What to Expect From Installation
A tankless water heater installation typically requires:
- Removing the existing tank unit
- Mounting the tankless unit (wall-mounted, usually in the same utility area)
- Upgrading the gas line if needed (tankless units require higher BTU flow)
- Installing a dedicated exhaust vent (direct-vent units are sealed combustion)
- Adjusting or adding water shut-off valves
Most installations take 3–5 hours. We handle everything including disposal of the old unit.
Tankless Maintenance
Tankless units need annual descaling to prevent mineral buildup, especially with Knoxville's moderately hard water. We offer annual maintenance visits and can set you up on our Bear Care Club membership for scheduled service.
Frequently Asked Questions
How much does tankless water heater installation cost in Knoxville?
A complete tankless installation runs $1,800–$3,500 depending on the unit and whether gas line upgrades are needed. After TVA rebates, the net cost is often $1,400–$2,800. Written estimate before any work begins.
Will a tankless water heater work with my existing gas line?
Maybe — it depends on the line size and your current appliance load. We assess the gas line during the estimate visit and tell you if an upgrade is needed and what it costs.
How long do tankless water heaters last in Knoxville?
With annual descaling maintenance, quality tankless units last 20–25 years — roughly twice the lifespan of a tank unit. The higher upfront cost typically pays back in 7–10 years through energy savings and longevity.
Can you service my existing tankless unit from another brand?
Yes — we service and repair tankless units from all major manufacturers, including units we didn't install.
Get a Tankless Water Heater Estimate
Call (865) 284-2424 or schedule online. We serve Knoxville and all surrounding communities — free estimates on new water heater installation.
This Service in Other Areas
Frequently Asked Questions
Tankless water heater installation in Knoxville runs $1,500–$3,500+ depending on the unit, venting requirements, and whether gas line upgrades are needed. Honey Bear Plumbing provides a firm quote before starting. License: TN CMC-A #83354.
Tankless water heaters typically last 15–20+ years with proper maintenance — significantly longer than the 8–12 year lifespan of tank water heaters. Annual descaling extends lifespan in areas with hard water.
For most Knoxville homeowners planning to stay 5+ years, yes. Tankless water heaters save 20–30% on water heating costs, never run out of hot water, and last nearly twice as long as tank units. The higher upfront cost pays back over the unit's life.
Yes. Knox County requires permits for tankless water heater installations. Honey Bear Plumbing handles the permit process and inspection coordination.