Find the Best Tankless Water Heater for Your Home
We compare and rank gas, propane, and electric tankless water heaters on flow rate, efficiency, and real install cost — so you get endless hot water without the guesswork.
Latest Reviews & Guides
Rinnai RX199iN Review 2026: Sensei RX vs RXP199iN vs the Old RU199iN, and the Warranty Fine Print
Rinnai RX199iN review for 2026: 0.98 UEF, 4.6 to 9.0 GPM by groundwater temperature (not 11.1), $1,532.79 to $1,768.98 at Rinnai-authorized dealers, and why the RXP199iN beats adding the $510 pump kit later.
Best PicksTankless Water Heater Brands 2026: Who Actually Makes Each One (and the 7 Worth Buying)
The best tankless water heater brands for 2026, ranked, plus who really builds them: ENERGY STAR's gas-tankless list shows two companies behind 72% of US models, one A.O. Smith heater under six badges, and Rheem owning EcoSmart.
Best PicksVEVOR Tankless Water Heater Review 2026: Electric, Propane and RV Units, and the Specs VEVOR Doesn't Publish
VEVOR sells 10 electric tankless heaters (8-36 kW, $122.99-$419.90), outdoor and indoor propane units, and 15x15 RV heaters. Real GPM math for every size, the 12-month warranty, the breaker sizes, and the one VEVOR to skip.
Best PicksFogatti Tankless Water Heater Review 2026: InstaGas Home Units, InstaShower RV Units, and the 24-Month Warranty
Fogatti sells two unrelated tankless lines: InstaGas non-condensing home heaters (120,000-180,000 BTU, $499-$766 at Home Depot) and InstaShower propane RV units. Real winter GPM from Fogatti's own catalog, the 24-month warranty it publishes itself, and who should buy one.
Buying GuidesDoes a Home Warranty Cover a Tankless Water Heater? (2026 Guide)
Home warranty service contracts and a tankless water heater's manufacturer warranty are not the same thing. Here's what American Home Shield, HomeServe, and other home warranty providers actually cover on a tankless unit — and the BTU cap and point-of-use exclusion that catches a lot of buyers off guard.
Buying GuidesWhat Does UEF Mean on a Tankless Water Heater? (2026 Guide)
UEF (Uniform Energy Factor) is the number on every water heater spec sheet, but it's one of the most misread stats in the category. Here's what it actually measures, why a 0.95 UEF doesn't always beat a 0.81, and how to compare it correctly across tankless models.
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Spec-Driven Reviews
We rank on measured GPM flow rate, UEF efficiency, and real-world install cost — not marketing claims.
Tankless Specialists
Gas, propane, condensing, and electric on-demand units — we know Rinnai from Rheem and UEF from GPM.
Every Budget
From under-$200 point-of-use electric units to premium condensing whole-home systems — clearly labelled.
Updated for 2026
Prices, picks, efficiency ratings, and tax-credit notes kept current.