How Much Does Tankless Water Heater Cost in Hawaii?
Hawaii pricing is above the national average. Updated for 2026.
Tankless Water Heater Pricing in Hawaii
In Hawaii, the average cost for tankless water heater is $4,544 installed, which is 42% higher than the national average of $3,200. Most Hawaii residents pay between $2,556 and $7,810.
Hawaii has a higher cost of living than most states, which translates to higher labor rates and material costs. Urban areas within Hawaii may be even higher.
Tankless (on-demand) water heaters heat water only when you need it, eliminating the standby energy loss of traditional tank heaters. They're compact, last longer, and can reduce water heating bills by 20-34%.
Hawaii vs National Average
What Affects Tankless Water Heater Cost in Hawaii?
Fuel Type
Gas tankless: $2,500-$5,500 installed. Electric tankless: $1,500-$3,000 installed
Retrofitting
Switching from tank to tankless may need new gas line ($500-$1,500), venting ($500-$1,000), or electrical upgrade ($300-$800)
Brand
Rinnai and Navien: $1,200-$2,500 for unit. Noritz: $1,000-$2,000. Budget brands: $500-$1,000
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💡 Tips to Save on Tankless Water Heater in Hawaii
- 1.Electric units cost less upfront but gas units have lower operating costs
- 2.Check for federal tax credits (up to $2,000 for qualifying units)
- 3.Consider point-of-use units ($200-$500) for single fixtures instead of whole-home
- 4.Get quotes from plumbers who specialize in tankless — general plumbers may overcharge
📈 Tankless Water Heater in Hawaii Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $3,860 | — |
| 2021 | $4,022 | +4.2% |
| 2022 | $4,283 | +6.5% |
| 2023 | $4,403 | +2.8% |
| 2024 | $4,544 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Tankless Water Heater in Hawaii
Recent Reports
Frequently Asked Questions
Is a tankless water heater worth it?
For most homes, yes. Despite higher upfront cost ($1,500-$3,000 more than tank), they save $100-$150/year on energy and last 20+ years vs 10-12 for tank heaters. Break-even is typically 6-10 years.
Can a tankless water heater run out of hot water?
Not in the traditional sense — they heat water continuously. However, they have a maximum flow rate (typically 5-10 GPM). Running multiple showers simultaneously can exceed capacity.
Tankless Water Heater Cost in Other States
Related Cost Guides for Hawaii
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