9 Best 60 Gallon Electric Water Heater | Outlasts the Houses

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The Rinnai CX199iN hits a 97% thermal efficiency rating — one of the highest in the tankless category — meaning it converts nearly all its fuel into usable heat. With 199,000 BTU and 11.1 GPM flow capacity, this unit can support a large home with multiple showers and appliances running simultaneously without any lag. It’s a natural gas condensing unit, so it requires a gas line, but it offers indoor or outdoor installation flexibility thanks to the Versa Vent system.

Real users upgrading from older Rinnai models report noticeably faster hot water arrival at distant faucets and a sharp drop in monthly fuel usage. The built-in Smart Sense gas control automatically detects whether it’s connected to natural gas or propane, which simplifies installation if you’re switching fuel types. The Bluetooth-enabled Rinnai Central app lets you monitor performance and troubleshoot from your phone.

This unit does require professional installation for warranty compliance, and the 11.1 GPM flow rate demands a sufficiently sized gas supply line and proper venting. Some users mention the unit is taller than previous models, so check your available clearance. For a household that wants power, efficiency, and smart-home integration, this is the benchmark.

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The RXP199iN shares the same 199,000 BTU and 11.1 GPM foundation as the CX199iN but adds a built-in recirculation pump with Smart-Circ technology. This pump learns your household’s water usage patterns and pre-heats the water in the pipes during high-demand periods, reducing the wait for hot water at remote faucets and cutting water waste. The UEF rating of 0.98 places it at the very top of residential gas tankless efficiency.

Owners who replaced older tank-style heaters with this unit report that even with a dishwasher, washing machine, and two showers running, the water temperature stays rock steady. The condensing design uses Schedule 40 PVC for venting instead of expensive stainless steel, and the integrated pump can be set to either economy or comfort mode depending on your priority. It installs indoors or outdoors, and the RX-OVC vent cap handles exterior setups.

Some users note the recirculation pump is louder than expected — you can hear it running 70 feet away in a quiet house. The frequency of the pump cycle isn’t adjustable beyond the two presets, which can be a minor annoyance. If you want the absolute fastest hot water delivery and don’t mind a little pump hum, this is the most advanced home unit Rinnai makes.

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The Noritz NRC66DVNG is a 6.6 GPM condensing gas unit that fits homes where space is at a premium — it measures just 13.8 inches wide by 23.6 inches tall. Despite its small footprint, it produces enough hot water for a family of five across a three-story home, as confirmed by multiple long-term owners. The Schedule 40 PVC venting eliminates the need for expensive stainless steel flues, and the included remote thermostat allows zone-based temperature control.

Users report a noticeable 10-20% reduction in gas consumption over six months compared to their previous tank heaters. The condensing design captures exhaust heat that would otherwise be lost, boosting overall efficiency. The low NOx burner also meets strict emissions standards in California and other regulated regions. The cold-water sandwich phenomenon — a brief burst of cold water when the unit fires up after idle — is present but manageable with pipe insulation.

This unit requires a gas meter capable of handling its 120,000 BTU draw; some homes may need a meter upgrade. A few owners mention the fan creates a noticeable buzzing sound during operation. If you have a moderately sized home and want a condensing tankless without paying for peak flow you’ll never use, this is the sweet spot.

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The Rheem RTEX-36 packs 36,000 watts of heating power into a compact wall-mounted unit that’s under 20 inches tall, making it an ideal solution for homes where tank space is unavailable. With a 99.8% energy efficiency rating and a flow rate of 6 GPM, it can handle two simultaneous showers in most climates. The external digital thermostat allows precise adjustment from 80°F to 140°F without opening the unit.

Switching from two 50-gallon tank heaters to this single unit cleans up garage space dramatically. Owners in snowy regions note that hot water takes slightly longer to reach distant fixtures compared to a tank system, but the never-ending supply more than makes up for it. The brass and copper water connections resist corrosion better than cheaper steel or plastic fittings found on budget models.

This unit demands a serious electrical setup — typically three 50-amp breakers with 6-gauge wire. Some local building codes may require specific amperage ratings that the RTEX-36 doesn’t meet, so check with your inspector before buying. If your panel is already maxed out, the electrical upgrade cost may approach the unit price itself. For homes with available capacity, it’s the most efficient electric tankless at this price point.

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Stiebel Eltron’s Tempra 36 Plus uses Advanced Flow Control technology that automatically adjusts flow rate to maintain your set temperature even when inlet water temperatures drop. This is a crucial feature for northern climates where cold winter groundwater can overwhelm lesser units. The 36 kW output provides up to 7.0 GPM depending on incoming water temperature, and the solid copper heating system ensures long-term reliability.

Owners who replaced 75-gallon tank heaters report that the Tempra 36 delivers 100°F+ hot water in one to two minutes versus five to seven minutes for the old tank, with no recovery wait. The digital display and preset memory buttons make temperature changes simple, and the unit runs nearly silently. The self-modulation feature scales power usage to match demand, so you’re not pulling 36 kW to wash your hands.

The electrical requirements are substantial — three 50-amp breakers with 6 AWG wire for the full 36 kW model. Some users experienced inconsistent temperature when their electrical supply dropped voltage, and a few report higher-than-expected electric bills because the unit can draw near-maximum power during long showers. If you have the electrical infrastructure, the Tempra 36 is the most refined electric tankless on the market.

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The Tempra 24 Plus is the lower-wattage sibling of the 36, designed for homes with 150-amp electrical service where the 36 kW model would require a panel upgrade. It still delivers endless hot water with the same Advanced Flow Control and self-modulation technology, but with a maximum flow rate suitable for one to two simultaneous showers. At 24 kW and 240V, it requires two 50-amp breakers and 8-gauge wiring.

Users in moderate climates report great results — the unit maintains consistent 115°F water temperature even during back-to-back showers. The energy savings are immediate because there’s no tank to keep hot 24/7; one owner calculated their electric bill dropped by roughly half the unit’s purchase price within the first year. The compact size, quiet operation, and seven-year leakage warranty add peace of mind.

Owners in colder northern states caution that the 24 kW model may struggle to deliver full flow during winter when groundwater temperatures drop below 50°F. You’ll still get hot water, but the flow rate will be reduced automatically to maintain temperature. If your home has high simultaneous demand or you live in a very cold region, the 36 kW version is a better fit.

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The Suburban Advantage SAW6D is a 6-gallon RV water heater that uses LP gas for primary heating with an optional electric element for backup — a niche unit far smaller than a 60-gallon home tank but worth reviewing for serious RV dwellers who live on the road full-time. The porcelain-lined steel tank resists corrosion better than aluminum competitors, and the replaceable anode rod simplifies annual maintenance. The direct-fit design matches the cutout dimensions of Atwood and other popular RV water heaters, making replacement straightforward.

Owners replacing old Atwood units report that the Suburban fits the existing opening perfectly, with plumbing connections lining up without modification. The LP gas burner heats the 6-gallon tank in about 6-7 minutes, and the electric element provides a slower but useful backup when parked with shore power. The included high-altitude orifice lets you operate in mountain regions without derating.

This unit does not include an exterior access door — you must reuse your existing one. The included control board mounting uses a velcro strip that some users replace with screws for a more secure fit. If you need a replacement for a failing RV water heater and want something that drops in without cutting new holes, this is the most reliable option in this specific size.

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The Reliance 20-gallon electric water heater is a compact 120V unit designed for mobile homes, skoolie conversions, and small workshops — not a substitute for a 60-gallon house unit, but the most affordable purpose-built electric tank for limited spaces. It plugs into a standard 15-amp household outlet and uses a 1,650-watt element to heat 20 gallons of water. The glass-lined steel tank resists rust, and the 150 PSI maximum pressure rating matches residential standards.

Skoolie and mobile home owners consistently report that this unit provides enough water for 15-minute showers at 1 GPM when the thermostat is set to 140°F. The compact 68-pound weight makes it manageable for a single installer. Multiple long-term users report this heater lasting about 10 years with annual sludge draining, which is impressive for the entry-level price tier.

The main drawbacks are the slow recovery time — roughly one hour to reheat the full 20 gallons after depletion — and reports of units arriving with dents or broken drain valves. The heating element can burn out if the tank is powered on while dry, so bleed the air before plugging it in. For a detached cabin, small workshop, or single-person RV setup, this is a functional and economical choice.

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The AQUASTRONG Inverter Pool Heat Pump is a completely different product category — it’s a heat pump for swimming pools, not a domestic water heater — but it’s included here because it solves the large-volume hot water problem for pool owners. With 35,000 BTU output and a 15.8 COP, it heats pools up to 9,000 gallons much more efficiently than electric resistance heaters. The DC inverter technology adjusts power consumption in real time, achieving 70% energy savings over traditional electric pool heaters.

Users with 11,000-gallon pools report that the unit raises water temperature 4-6°F per day in winter conditions, with a daily running cost around -4 once the initial heat-up is complete. The 48 dB noise level is genuinely quiet — you can hold a conversation next to it. The WiFi app provides scheduling, temperature monitoring, and energy tracking, and the auto-defrost cycle allows year-round operation in cold climates.

Installation requires a 30-amp or 40-amp breaker depending on the model, plus the included hose adapters and PVC pipe connectors. Some users experienced occasional app disconnections that required a breaker reset to resolve. If you’re managing a pool and want to extend your swimming season without a gas bill spike, this is the most energy-efficient solution available at this price.