Finding the right tankless hot water heater means balancing space, power needs, and how many points of use you want to serve at once. This guide highlights five solid options across electric and gas styles, suitable for apartments, small homes, and larger houses with multiple bathrooms. Each pick targets specific buyers: compact spaces, high flow needs, smart home features, or outdoor installations. Read on to compare installation requirements, performance, and practical buying tips.
| Product | |||
|---|---|---|---|
| SIVUATEK 14kW Tankless Electric | Electric | 14 kW; up to 99.8% efficiency; 1–2 points | Under-sink or compact setups |
| Rheem RTG Series 8.4 GPM | Gas | 8.4 GPM; 180,000 BTU | Whole-house, multi-bath homes |
| Orbek 14kW Tankless Electric | Electric | 14 kW; 3.38 GPM | 2–3 points of use; energy savvy |
| Westinghouse 14kW Wifi Electric | Electric | 14 kW; 3.4 GPM @ 62°F inlet | Smart home integration |
| NOVIEEX 18kW Tankless Electric | Electric | 18 kW; up to 4.9 GPM | 2–3 fixtures; space-saving |
SIVUATEK 14kW Tankless Electric, 240V
This 14kW electric unit delivers instant hot water for 1–2 points, like a kitchen and bathroom setup. It requires a 60-amp circuit and 1/2″ NPT connections. Best for compact under-sink installations where space is at a premium. Cautions: ensure your electrical panel can support a dedicated 60A circuit before purchase.
Rheem RTG Series 8.4 GPM Gas Tankless Heater
Designed for whole-house use, this outdoor gas model provides 8.4 GPM at a 35°F rise and up to 180,000 BTU/h. It’s best for larger homes with multiple showers or baths. A caveat: outdoor installation requires appropriate venting and weatherproofing; ensure outdoor setup complies with local codes.
Orbek 14kW Electric Tankless Water Heater
Orbek’s 14kW model provides up to 3.38 GPM and emphasizes energy efficiency with water‑electric separation technology. It’s best for 2–3 fixtures like a bathroom and kitchen. Best for homes with strong electrical capacity; consider using a licensed electrician to verify breaker and wiring requirements before installation.
NOVIEEX 18kW Tankless Electric
With up to 4.9 GPM and 18 kW, this unit suits small-to-medium homes or apartments needing simultaneous hot water for multiple fixtures. It requires two 40A double-pole breakers and adequate wiring. Choose this if you have a compatible electrical panel and want higher flow for several points of use.
Westinghouse 14kW WiFi Electric
Features smart home compatibility, temperature memory, and quick 3-second heating with 98% efficiency. Best for tech‑savvy buyers seeking convenient control via app or voice assistants. Limitation: ensure your home Wi‑Fi and smart hub can support the connection and routines you plan to use.
Jflapil 110V 3000W Tankless Electric
Compact under-sink option with 3,000W and temperature control. Best for small spaces and light hot water needs in kitchens or powder rooms. Note: 110V units may have limited flow compared to higher‑voltage models; verify circuit capacity and fixture requirements before installation.
Buying Guide
How do you pick between electric and gas tankless heaters? Consider installation location, circuit capacity, venting needs, and climate. Electric models are easier to install indoors and require less maintenance, but high-flow homes demand bigger electrical service. Gas units offer higher output for whole-house use but need proper venting and outdoor or vented installation. For smart features, confirm compatibility with your existing home automation. Always check local codes and hire licensed professionals for electrical or gas work.
Key purchase considerations
- Flow rate: Match GPM to your peak concurrent usage (showers, sinks, appliances).
- Electrical or gas service: Ensure your panel and breakers are sized appropriately for electric units; verify gas line and venting for gas models.
- Installation space: Choose a model that fits available space and supports under-sink or wall-mount installation.
- Efficiency and standby loss: Tankless units avoid standby energy but real-world efficiency varies with usage patterns.
- Smart features: If desired, pick models with WiFi/voice control and temperature memory for convenience.
FAQ
- What size tankless heater do I need for a small apartment? Often 14 kW electric units or similar flow ratings suffice for 1–2 fixtures, depending on climate and usage.
- Can I install a tankless heater myself? Consult local codes and hire a licensed electrician or plumber for electrical or gas connections and venting.
- Is gas more suitable than electric for whole-house hot water? Gas typically offers higher flow and outdoor installation advantages for larger homes.
- Do tankless heaters require venting? Gas models require venting; most electric models do not but check unit specifics.
- Will a WiFi-enabled heater work with Alexa or Google Home? Many models offer compatibility; confirm app support and routines.
- What maintenance is needed? Keep in mind mineral buildup in hard water areas; some models include protective features.