Water heater replacement is one of those purchases that happens twice in most homeowners' lifetimes. Get it right and you forget about it for 10-15 years. Get it wrong and you're paying for it on every utility bill and every cold shower. Here's how we help our Las Vegas customers think through it.
Start with the right size, not the technology
Before deciding tank vs tankless, figure out how much hot water you actually need. Rough sizing for tank heaters:
- 1-2 people: 30-40 gallons
- 3-4 people: 40-50 gallons
- 5+ people: 50-80 gallons (or tankless)
- Large home with multiple bathrooms used simultaneously: tankless or two tanks
If you're constantly running out of hot water with your current heater, size up. If you have leftover hot water at the end of the day, you can downsize and save on energy.
Tank water heaters: the workhorses
Tank heaters store 30-80 gallons of pre-heated water. When you turn on a hot tap, you get hot water immediately because it's already heated.
Pros
- Cheapest upfront: $1,200-$2,400 installed in Vegas
- Simple, reliable technology
- Works during power outages (gas units)
- Same-day replacement available
Cons
- Standby heat loss — you pay to keep water hot all day even when not using it
- Limited supply — runs out during high-demand periods
- Shorter lifespan (8-12 years in Vegas due to hard water)
- Takes up significant space
Best for
Small to medium households with predictable hot water use. Renters of property with limited budget. Replacements where you're not changing the configuration.
Tankless water heaters: endless hot water
Tankless units heat water on demand — only when you turn on the tap. No storage tank, no standby loss.
Pros
- Endless hot water (sized appropriately)
- 20-30% lower energy bills vs tank
- Longer lifespan: 15-20 years typical
- Smaller footprint — wall-mounted
- Federal tax credit up to $600 for high-efficiency units
Cons
- Higher upfront: $2,800-$4,500 installed
- May need gas line upgrade (tankless gas units draw more BTU)
- Slight delay in hot water at the tap
- Requires annual descaling in Vegas hard water
- May need water softener to protect investment
Best for
Larger households (4+ people). Homes where someone takes the last shower with cold water. Homeowners staying 10+ years. People prioritizing energy efficiency.
Vegas-specific tankless tip
Our water is HARD — 18-22 grains per gallon. Tankless heat exchangers scale up fast. If you go tankless, plan for annual descaling ($150-$250) OR install a water softener at the same time. Skipping this can cut your tankless lifespan in half.
Hybrid (heat pump) water heaters: most efficient
Heat pump water heaters use ambient air to heat water — 3x more efficient than electric tanks.
Pros
- Most efficient: $200-$400/year energy savings vs electric tank
- Federal tax credit up to $2,000
- Long lifespan: 13-15 years
- Works as a dehumidifier (bonus in summer)
Cons
- Higher upfront: $2,400-$3,500 installed
- Needs space (~1,000 cu ft) for air intake
- Slight hum during operation
- Slower recovery rate during heavy demand
- Only makes sense if currently electric
Best for
Homes with electric water heaters. Garages or large utility rooms. Owners who want maximum efficiency and willing to pay slightly more upfront.
Gas vs electric in Vegas
If your current heater is gas, stick with gas. The line is already there, gas water heating is generally cheaper per gallon, and gas units have faster recovery.
If your current heater is electric, consider a heat pump unit. The efficiency gain is huge. Adding a gas line ($600-$1,500) usually doesn't pay back for water heating alone.
What about brand?
For tank heaters: Rheem, Bradford White, AO Smith are all solid. We stock all three. For tankless: Rinnai, Navien, Noritz. Rinnai has the most consistent track record in Vegas hard water. Navien has the highest efficiency.
For MOEN Smart Valve owners — make sure whatever heater you choose has good external sensors so MOEN can monitor properly.
What it costs in Vegas (installed)
- 40-gallon gas tank, basic install: $1,200-$1,600
- 50-gallon gas tank, basic install: $1,400-$1,800
- 50-gallon gas tank, full code-update install: $1,600-$2,400
- Tankless gas, replacing existing tank: $2,800-$3,800
- Tankless gas, new gas line + venting: $3,800-$4,500
- Heat pump 50-gallon: $2,400-$3,200
- Permit fees: $80-$200 depending on jurisdiction
"My advice is usually this: if your old heater is under 8 years old and just needs a part, repair it. If it's 10+ years old and you're getting cold showers, replace it. Don't put a $500 repair into a unit that's going to die in 2 years anyway." — Matt, owner
The replacement process
Standard tank replacement: 3-4 hours. Tankless install (replacing tank): 6-8 hours. Tankless with gas line work: full day.
We pull permits (when required by your jurisdiction), haul away the old unit, and pressure test the new system. All installs include workmanship warranty plus the manufacturer warranty on the unit itself.
Get an honest recommendation
Call (702) 682-1626 and tell us about your current setup. We'll help you decide which option fits your needs and budget without pushing the most expensive choice. See our Water Heater services page for full details.