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
How to Winterize a Tankless Water Heater (2026): Home vs. RV Steps
Draining a home tankless water heater for winter storage uses a different procedure than an RV unit — and pouring RV antifreeze into the wrong one can damage it. Step-by-step for both, sourced from Rinnai, Eccotemp, and RV manufacturer guidance.
Best PicksBest Richmond Tankless Water Heaters 2026: RMTEX-27, RMTG-70DVLN & RMTGH-95 — and Why It's Actually a Rheem
Richmond tankless water heaters are made by Rheem and sold mostly through Home Depot at a lower price than the Rheem-badged lineup. We ranked the whole-home electric RMTEX-27, the non-condensing gas RMTG-70DVLN-3, and the condensing RMTGH-95 — real prices, specs, and what you give up for the discount.
Best PicksBest Atmor Tankless Water Heaters 2026: Point-of-Use to Whole-Home, and What the Shorter Warranty Buys You
Atmor is a budget-focused, direct-to-retail electric tankless brand sold at Home Depot, Lowe's, and Amazon — real prices and specs on the AT-35WH-HD point-of-use unit, the 29kW AT-29WH-HD whole-home model, and the 36kW PRO XTP, plus why its 2-year parts warranty is half of what Rheem and EcoSmart offer.
Buying GuidesShould You Rent or Buy a Tankless Water Heater? The 2026 Cost Math
Rental programs like Reliance and Enercare charge $40–$58 a month for a tankless water heater with free installation. We run the real numbers against buying outright to find the break-even point — and the one home-sale detail that catches new owners off guard.
GuidesTankless Water Heater Temperature Setting: The 120°F Guide (2026)
What temperature to actually set a tankless water heater to, why 120°F is the CPSC/DOE-recommended balance of safety and energy savings, and how tankless units sidestep the Legionella risk tank systems carry at that setting.
Buying GuidesTankless Water Heater Operating Cost: What It Actually Costs Per Month (2026)
What a tankless water heater actually costs to run monthly — electric vs gas, by household usage, using 2026 EIA electricity and gas rates — not the installed price, the ongoing utility bill.
Why Trust TanklessHeaterLab?
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.