Tankless
TANKLESS WATER HEATER INSTALL & REPAIR — ENDLESS HOT WATER
Hot water that doesn't run out. 25-30% less gas use. 20-year lifespan instead of 10. Rinnai, Navien, Noritz — installed, permitted, warrantied by our in-house crew.
4.9 · 4,400+ reviews
Verified Google reviews
4.9★ on Google
4,400+ reviews
24/7 Emergency
60–90 min dispatch
Licensed & insured
LA Master Plumber #1874
North Louisiana
Ruston to Shreveport
Flat-rate pricing
Quoted before we start
Overview
When tankless makes sense — and when it doesn't
A tankless water heater heats water on demand instead of keeping 50 gallons hot 24 hours a day. When you turn on a hot faucet, water flows through a heat exchanger, gets heated instantly, and comes out hot for as long as you want. No tank to run out, no standby energy loss, no 12-year replacement clock. Done right, tankless is the single best upgrade for a family that actually uses hot water.
But tankless isn't automatically better for every household. A two-person apartment with one bathroom doesn't see the payback. Tankless shines for larger families (3+ people), households with high simultaneous hot water demand, homes where you're already mid-remodel and touching the gas and venting, or anyone planning to stay in the house 10+ years for the gas savings to pay back the upfront cost.
What we install
- Rinnai — our default recommendation for most North Louisiana homes. Reliable, well-supported parts network, 12-year residential warranty
- Navien — condensing units, higher efficiency (94-98%), best for larger homes and low-gas-bill priority
- Noritz — commercial and larger residential, long track record on apartment buildings and light commercial
- Indoor and outdoor models — we specify based on venting access, climate, and space
- Gas and propane — most installs are natural gas; propane for homes beyond gas service
What changes during install
A tankless replacement is more than a swap. Expect the following as part of a proper install. Gas line upgrade — tankless needs a 3/4" gas line minimum, sometimes 1", and often the existing 1/2" line from a tank install won't do it. Gas meter capacity check — older homes may need a meter upgrade from the utility. Venting — condensing tankless units run PVC or polypropylene vent pipe direct through the wall; non-condensing units need category III stainless. Condensate drain — condensing units produce acidic condensate that needs a neutralizer and a drain path. Electrical — tankless units need a 120V outlet. Water softener recommended — hard water destroys tankless heat exchangers 2-3x faster than soft water; we pair tankless with softeners on most installs.
Honest tankless math for North Louisiana
A 50-gallon tank install runs $1,850-$2,850. A tankless install runs $3,500-$6,800. The upfront delta is $1,500-$4,000. Tankless saves 25-30% on gas usage, which on a typical North Louisiana family hot water bill ($35-$55/mo on gas) is $9-$16/mo or $108-$192/yr. Payback on upfront delta is 10-20 years — the same time as the tankless lifespan. You're not buying tankless to save money. You're buying it for endless hot water, smaller footprint, and longer lifespan. If that's worth the premium to you, it's the right call.
Classic Membership members get annual descaling included, which is the single biggest thing you can do to hit the 20-year lifespan on a tankless in North Louisiana hard water territory.
Free quote
Schedule a tankless assessment
In-home assessment checks gas line, venting, and electrical. Quote includes everything needed for a code-compliant install.
4.9★
24/7
Emergency
Free
Quote
Current coupons
View all$200 OFF
Tankless water heater install
New equipment only. One per household.
Expires 12/31/2026
$400 OFF
Tankless + water softener install together
Standard pricing. Must mention at booking.
Expires 12/31/2026
UP TO $300
Mail-in rebate on qualifying tankless models
Call for qualifying models and details.
Expires 12/31/2026
Mention coupon when booking. One offer per household.
Warning signs
Signs Tankless Is The Right Upgrade For You
Tankless isn't for everyone. It shines in specific situations — here's when it makes sense.
Large family (4+ people) regularly running out of hot water mid-shower
Current tank is 10+ years old and approaching end-of-life
You want to reclaim the floor space a tank currently takes up
You're already doing a remodel that touches the gas line and utility room
Planning to stay in the home 10+ years and want long-term lower gas bills
High-demand simultaneous use (shower + dishwasher + laundry) overwhelms current tank
You have a vacation home that sits unused and you don't want a tank heating nothing
Currently have a 75-gallon tank and want to downsize footprint without losing capacity
Prior water heater experience includes tank rupture and flooding
You value endless hot water for luxury tubs or big soaking baths
Endless hot water
Nobody takes the last shower.
Tankless heats water on demand. Shower, dishwasher, and washer running simultaneously — still hot. 20-year lifespan, 25-30% less gas, wall-mount saves floor space.
Typical lifespan
20yr
Across Ruston, Monroe, Shreveport, Bossier City, and North Louisiana.
The Process
How a Tankless Install Runs
On the truck
Professional tools, parts, and diagnostics — every call.
In-home assessment
Tech reviews existing gas line size, gas meter capacity, venting routes, electrical availability, water supply line, and softener status. You get a scoped quote with any required upgrades built in — no surprise add-ons during install.
Unit selection and scheduling
We recommend a specific Rinnai, Navien, or Noritz model based on household size, simultaneous use, and vent type. Most installs schedule 3-7 days out; sooner if inventory's on hand and your old unit is leaking.
Install day
Old tank removed and hauled off. New tankless mounted to wall. Gas line upgraded if needed. Venting installed through exterior wall. Condensate drain routed to drain. Water connections made with service valves for future descaling. Full day for most jobs, two for major gas line upgrades.
Commissioning and testing
Pressure test the gas line, check for combustion air, run hot water through every fixture, verify temperature stability, register warranty with manufacturer. You get a walkthrough on how to use the unit and what the error codes mean.
Permit and inspection
We pull the city permit before install and schedule the inspection afterward. Pass the inspection, register the manufacturer warranty (12 years on parts for most Rinnai residential), and include our 10-year workmanship warranty on the paperwork.
Pricing
Tankless Water Heater Cost in North Louisiana
Flat-rate, quoted after the assessment. Pricing depends on unit size, venting complexity, and required upgrades.
Standard Rinnai tankless install (condensing)
Most common North Louisiana residential install
Standard
$4,500–$6,800
Member · save 15%
$3,825–$5,780
Navien condensing tankless install
Higher-efficiency option, larger family homes
Standard
$4,800–$7,200
Member · save 15%
$4,080–$6,120
Noritz tankless install
Reliable workhorse for standard residential
Standard
$4,200–$6,500
Member · save 15%
$3,570–$5,525
Non-condensing tankless install
Lower upfront, slightly lower efficiency
Standard
$3,500–$5,200
Member · save 15%
$2,975–$4,420
Gas line upgrade (3/4" to 1")
Often required on tank-to-tankless conversion
Standard
$485–$1,250
Member · save 15%
$412–$1,063
Gas meter upgrade coordination
Utility handles actual meter — we coordinate
Standard
Included–Included
Member · save 15%
Included–Included
Tankless descaling service (annual)
Included for Classic Membership members
Standard
$195–$325
Member · save 15%
$166–$276
Tankless repair service call
Waived if you approve the repair
Standard
$129–$189
Member · save 15%
$110–$161
Heat exchanger replacement (out of warranty)
Rare; prevented by annual descaling
Standard
$650–$1,450
Member · save 15%
$553–$1,233
Emergency after-hours surcharge
Nights, weekends, holidays
Standard
$95–$150
Member · save 15%
$81–$128
Member pricing reflects the Classic Membership 15% repair discount. Service call fees are separate.
Prices reflect 2026 North Louisiana residential work. Commercial multi-unit setups quoted separately.
Classic Membership
One plan. Whole-home peace of mind.
For $189 a year, members get 15% off every HVAC and plumbing repair, two complete HVAC tune-ups, a free plumbing and drain check-up, and priority scheduling on every call.
- 15% off repairs
- Priority scheduling
- 2 HVAC tune-ups/yr
- After-hours discounts
- $25 savings certificate
- Guaranteed flat-rate
Classic Membership
$189/year
One flat yearly price covers your whole home — everything listed, no per-visit fees, no surprises.
Questions? (318) 319-0220
Cancel anytime · 1-yr min
Compare
Tank vs. Tankless vs. Heat Pump Water Heater
Three ways to make hot water. The right one depends on family size, fuel type, upfront budget, and how long you're staying.
| Feature | Tank (gas) | Tankless (gas) | Heat Pump |
|---|---|---|---|
| Upfront install | $1,850 – $2,850 | $3,500 – $6,800 | $3,200 – $4,800 |
| Lifespan in North Louisiana | 8 to 12 years | 15 to 20 years | 10 to 15 years |
| Hot water supply | 50-75 gal then recovery | Endless, flow-limited | 50-80 gal then recovery |
| Gas/electric use | Baseline | 25-30% less gas | 50% less total energy |
| Space used | 2x2 ft floor footprint | Wall-mount, saves floor | 2x2 ft plus clearance |
| Best for | Budget, 2-person households | Families 3+, long-term owners | All-electric homes, mild climate |
| Downsides | Runs out, 12-yr replace | Higher upfront, needs descaling | Needs warm space, fan noise |
FAQ
Tankless FAQs
A standard condensing tankless install runs $4,500 to $6,800 all-in — unit, mount, gas line upgrade if needed, venting, condensate drain, permit, and 10-year workmanship warranty. Non-condensing units are cheaper ($3,500-$5,200) but less efficient. Add $485-$1,250 if the existing gas line is too small and needs to be upgraded from 1/2" to 3/4" or 1".
Related services
Related Plumbing Services
Water Heater Repair & Install
Standard tank water heater service and replacement.
Water Softener Install
The #1 thing that extends tankless life in North Louisiana hard water.
Gas Line Repairs
Gas line upsize, leak repair, meter coordination.
Water Filtration
Whole-home filtration extends tankless and appliance life.
24/7 Emergency Plumber
No hot water emergency? 60-90 minute dispatch.
Available Around the Clock
Emergency?
We answer 24/7.
Burst pipe, water heater out, sewer backup? Real plumbers pick up — no answering machines. Mark Johnson & Sons Plumbing serves North Louisiana any time, day or night.
LA Master Plumbing #1874 · Backflow Cert #28131 · Master Natural Gas Fitter #LMNGF9062 · State Contractors #35794