NOVIEEX 13kW 240V Electric Tankless Water Heater vs NOVIEEX 27 kW 7.4 GPM Tankless Water Heater (2026): Key Differences
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The novieex 13kw 240v electric tankless water heater vs 27 kw 7 4 gpm comparison highlights two electric units from the same brand. Both models offer indoor installation and precise digital temperature control. They share identical safety features and high efficiency ratings. The main difference lies in their power output. One unit is designed for single-bathroom use, while the other supports whole-house demand. You must check your electrical capacity before choosing either option.
Key differences
| Aspect | NOVIEEX 13kW 240V Electric Tankless Water Heater | NOVIEEX 27 kW 7.4 GPM Tankless Water Heater |
|---|---|---|
| Wattage | 13 kW | 27 kW |
| Flow Rate | 3.6 GPM | 7.4 GPM |
| Voltage | 240V | 240V |
| Installation Location | Indoor | Indoor |
| Use | 1-2 point | Whole House |
| Water Connections | 1/2" NPT | 3/4" NPT |
Which one should you choose?
Choose NOVIEEX 13kW 240V Electric Tankless Water Heater if
- You need hot water for only one bathroom at a time.
- Your electrical panel can support a single 60A circuit.
- You want a compact unit for tight utility spaces.
Choose NOVIEEX 27 kW 7.4 GPM Tankless Water Heater if
- You need to run multiple fixtures simultaneously.
- Your home requires higher flow rates for bathtubs or showers.
- You have the electrical capacity for three 40A breakers.
Verdict: Choose the 13 kW model if your needs are limited to a single bathroom and you have simpler electrical requirements. The 27 kW unit is the better choice for larger households that demand simultaneous hot water at multiple points. Both models provide reliable indoor performance with identical safety and control features.
13kW vs 27kW Electric Heater
Power Output
The 13kW model delivers 13,000 watts of heating power, requiring a single 60A double-pole circuit breaker and 6 AWG wires. In contrast, the 27kW unit provides 27,000 watts, needing three 40A double-pole breakers and three sets of 8 AWG wires. Both operate at 240V, but the higher wattage of the larger unit demands significantly more electrical infrastructure. You must verify your home's capacity before choosing the more powerful option. This difference directly impacts your ability to run multiple fixtures simultaneously without voltage drops.
Flow Rate
Flow rate determines how much hot water you get at once. The 13kW heater offers a maximum flow of 3.6 GPM, which suits one or two simultaneous uses like a shower and a sink. The 27kW heater provides up to 7.4 GPM, supporting three to four applications at once, such as a shower, tub, and washing machine. If you need to run multiple outlets concurrently, the higher flow rate of the 27kW model prevents temperature drops. The 13kW unit is sufficient for smaller households with lower concurrent demand.
Water Connections
The physical connection size affects plumbing compatibility. The 13kW model uses 1/2" NPT water connections, which is standard for single-fixture installations. The 27kW unit features larger 3/4" NPT connections to handle the increased volume of water. This difference means you may need different adapters or piping depending on your existing plumbing setup. The larger connections on the 27kW model support its higher flow capacity. Ensure your home's supply lines match the chosen unit's inlet and outlet sizes to avoid pressure loss.
Temperature Control
Both units offer precise digital temperature management. You can adjust settings from 77°F to 140°F in exact 1°F increments on an LED display. Each model features smart adaptive heating to maintain constant temperatures and prevent cold shocks. The 13kW unit uses a smart adaptive system, while the 27kW model employs a smart centralized heating matrix. Both eliminate scalding risks and provide stable output. Since the control range and precision are identical, neither model holds an advantage in user interface or temperature accuracy.
Dimensions
Size matters for installation space. The 13kW heater measures 11.14 inches wide, 15.86 inches high, and 3.18 inches deep. The 27kW unit is slightly wider at 14.13 inches, while sharing the same height and depth. Both are wall-mounted and indoor-only. The 13kW model is more compact, making it easier to fit in tight closets or small utility areas. The 27kW unit is wider but still slim. If space is extremely limited, the narrower 13kW model offers a better fit without compromising height requirements.
Choose the right NOVIEEX model
Single bathroom or tiny home users
You need a compact unit for one or two fixtures. The 13kW model delivers up to 3.6 GPM, which handles a shower and sink simultaneously. It requires only one 60A breaker and 6 AWG wiring, making installation simpler for smaller electrical setups in apartments or condos.
Whole house or multi-point households
You require high flow for three to four simultaneous uses. This 27kW unit provides 7.4 GPM to support bathtubs, washing machines, and multiple showers. Note that it needs three 40A breakers and 8 AWG wires, so verify your electrical capacity before purchasing this heavy-duty option.
Users prioritizing simpler electrical installation
You want to avoid complex wiring requirements. The 13kW heater uses a single 60A double-pole circuit breaker and one set of 6 AWG wires. This single-circuit setup is easier to manage than the three-circuit requirement of the 27kW model, reducing installation complexity for standard homes.
The products compared
NOVIEEX 13kW 240V Electric Tankless Water Heater
Best for: single-bathroom homes with 60A electrical capacity
- Fuel Type
- Electric
- Flow Rate
- 3.6 GPM
- Wattage
- 13kW
- Installation Location
- Indoor
- Voltage
- 240V
- Temperature Control
- 77°F to 140°F, 1°F increments
View on Amazon: NOVIEEX 13kW 240V Electric Tankless Water Heater Affiliate link
This NOVIEEX unit delivers 13kW of heating power at 240V, providing up to 3.6 GPM of flow. It features a slim 11.14-inch width and precise temperature control from 77°F to 140°F in 1°F increments. You get endless hot water with 99.8% efficiency. It suits single-bathroom homes or tight utility spaces where space saving matters more than high-volume multi-point output.
Pros
- 13kW heating power at 240V for strong performance
- Slim 11.14-inch width saves over 80% space
- Precise LED control in 1°F increments from 77°F to 140°F
- 99.8% heating efficiency eliminates standby loss
Cons
- Lower 3.6 GPM flow rate limits simultaneous multi-fixture use
- Requires 60A double-pole circuit breaker and 6 AWG wiring
- Indoor installation only
Good fit if
- You need a compact unit for a single bathroom
- You have the electrical capacity for a 60A breaker
- You want precise temperature adjustments in 1°F steps
Skip if
- You need high flow for multiple bathrooms running at once
- You cannot install a dedicated 60A double-pole circuit
- You require outdoor installation capability
Verdict: NOVIEEX 13kW 240V Electric Tankless Water Heater fits single-bathroom households that prioritize space savings and precise temperature control over high-volume flow.
NOVIEEX 27 kW 7.4 GPM Tankless Water Heater
Best for: Whole-house hot water with high electrical capacity
- Fuel Type
- Electric
- Flow Rate
- 7.4 GPM
- Wattage
- 27kW
- Installation Location
- Indoor
- Voltage
- 240V
- Temperature Control
- 77°F to 140°F, 1°F increments
View on Amazon: NOVIEEX 27 kW 7.4 GPM Tankless Water Heater Affiliate link
This NOVIEEX 27kW unit delivers up to 7.4 GPM at 240V, supporting three to four simultaneous water sources. It features a slim 14.13-inch width and precise 1°F temperature control. The high wattage requires three 40A breakers and 8 AWG wiring. It suits whole-house needs where electrical capacity allows and space is limited.
Pros
- 27kW heating power for high flow rates
- Max 7.4 GPM output for multiple fixtures
- Precise 1°F temperature increments on LED display
- Slim 14.13-inch width saves wall space
- 99.8% energy conversion efficiency
Cons
- Requires three 40A double-pole circuit breakers
- Needs three sets of 8 AWG wires
- Indoor installation only
Good fit if
- You need high flow for multiple bathrooms
- You have the required 240V electrical capacity
- You want a compact wall-mount design
Skip if
- You cannot install three 40A breakers
- You need outdoor-rated equipment
- Your wiring is smaller than 8 AWG
Verdict: NOVIEEX 27kW Electric Tankless Water Heater fits homes with strong electrical panels needing high-volume hot water for multiple simultaneous uses.
Specifications side by side
| Spec | NOVIEEX 13kW 240V Electric Tankless Water Heater | NOVIEEX 27 kW 7.4 GPM Tankless Water Heater |
|---|---|---|
| Fuel Type | Electric | Electric |
| Flow Rate | 3.6 GPM | 7.4 GPM |
| Wattage | 13kW | 27kW |
| Installation Location | Indoor | Indoor |
| Voltage | 240V | 240V |
| Temperature Control | 77°F to 140°F, 1°F increments | 77°F to 140°F, 1°F increments |
| Dimensions | 15.86" H x 11.14" W x 3.18" D | 14.13 W × 15.86 H × 3.18 D in |
| Use | not stated | Whole House |
| Color | Silver | Silver |
| Model | DS-18 | DS-18 |
| Size | not stated | 27 kW |
Frequently asked questions
Can the 13kW NOVIEEX unit supply hot water to multiple bathrooms at once?
No, it cannot. The 13kW model is designed for single-bathroom homes with limited electrical capacity. It delivers up to 3.6 gallons per minute. This flow rate handles one shower and one sink simultaneously. It is not suitable for whole-house use or multiple bathrooms running at the same time.
What electrical panel capacity is required for the 27kW NOVIEEX heater?
You need a strong electrical panel for the 27kW unit. It requires three 40A double-pole breakers. You also need three sets of 8 AWG wires. This high power demand supports whole-house hot water needs. It is not compatible with standard single-circuit setups found in smaller homes.
Do both NOVIEEX tankless heaters use the same voltage and fuel type?
Yes, both models share the same fuel type and voltage. They are both electric units. Each requires a 240V power supply. This commonality simplifies compatibility checks. However, the wattage differs significantly, which dictates the necessary circuit breaker size and wiring gauge for each installation.
Which NOVIEEX model is better for saving space in a small utility room?
The 13kW model is better for space savings. It measures 11.1 inches in width and length. The 27kW unit is wider at 14.1 inches. Both are silver and fit indoor installations. If your utility room is tight, the compact 13kW footprint provides precise temperature control without taking up extra wall space.
Is the 27kW heater suitable for a whole house with high hot water demand?
Yes, it is built for whole-house use. The 27kW unit provides 7.4 gallons per minute. This high volume supports multiple simultaneous uses. It fits homes with strong electrical panels. If you need hot water for several fixtures at once, this model delivers the necessary volume compared to the lower-output 13kW version.
What is the difference in physical size between the two NOVIEEX models?
The height is identical for both, at 15.9 inches. The width and length differ. The 13kW model is 11.1 inches square. The 27kW model is 14.1 inches square. The larger unit accommodates its higher 27kW power output. You should measure your installation space to ensure the wider 27kW unit fits comfortably.
Can I install the 27kW heater if I only have a 60A circuit?
No, you cannot. The 27kW heater requires three 40A double-pole breakers. A single 60A circuit is insufficient for its 27,000 watts of power. The 13kW model works with one 60A breaker. You must upgrade your electrical panel and wiring if you choose the higher-capacity 27kW unit for your home.