A Black Friday "deal" is often a normal price next to an inflated list price. Here a tankless water heater only counts as on sale when its checked price is at least 15% below its own typical price over the last 90 days, from our price history. The best-rated models are listed too, since many are good value without a sale.
On sale now
No tankless water heater rated 3.8 or higher is 15% or more below its typical price at the last price check (October 31, 2026). Prices are rechecked through the sales; this list updates when one drops. See the recent price changes.
Best buys at their normal price
The top-rated models in each fuel. A sale on one of these is worth more than a big discount on a weaker model.
Best Gas Tankless Water Heaters
- Rinnai Sensei RX199i#1 of 20Full review
A top choice for a large home that wants one heater for three or more showers at once with the lowest gas bills Rinnai offers.
Amazon $1,532.79$1,532.79199,000 BTU/h11 GPM0.98 - Rheem RTGH-95DV#2 of 20Full review
A well priced condensing whole home heater for buyers who want PVC venting and lower gas bills.
Amazon $1,411.70 Amazon $1,411.99$1,411.70199,900 BTU/h9.5 GPM0.93 - Eccotemp 7GB Builder Grade#3 of 20Full review
A strong value outdoor heater for a natural gas home in a mild climate, with a better warranty than most budget rivals.
Amazon $499$499180,000 BTU/h7 GPM-
Best Electric Tankless Water Heaters
- EcoSmart ECO 36#1 of 20Full review
For a large home with 300 A service that wants all electric hot water. The lifetime warranty and low price per kilowatt make it a strong value if a pro installs it.
Amazon $699$69936 kW8.8 GPM0.94 - Stiebel Eltron Tempra 36 Trend#2 of 20Full review
The pick for a larger home with 300 A service that wants electric whole house hot water, even in cooler regions. Few electric heaters match its power and warranty.
Amazon $749$74936 kW7.5 GPM0.98 - Stiebel Eltron Tempra 29 Trend#3 of 20Full review
For homes with 200 A service in mild climates that want two showers at once from one heater.
Amazon $639.99$639.9928.8 kW6 GPM0.98
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.