NOVIEEX Tankless Water Heaters: 4 Picks Ranked by Specs
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We ranked the best NOVIEEX tankless water heaters by their published specifications. This list covers four models, including natural gas, propane, and electric options for indoor use. The top pick is the Novieex 4.3 GPM Indoor Natural Gas Water Heater. It leads because it balances a 4.3 GPM flow rate with a compact footprint for small spaces. Each unit differs in voltage, wattage, and physical dimensions. You can compare these specs to find the right fit for your home.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Novieex 4.3 GPM Indoor Natural Gas Water Heater Best overall | small indoor spaces with natural gas | Check price of Novieex 4.3 GPM Indoor Natural Gas Water Heater on Amazon |
| 2 | NOVIEEX 13kW 240V Electric Tankless Water Heater Best 13 kw | Single bathroom electric installations | Check price of NOVIEEX 13kW 240V Electric Tankless Water Heater on Amazon |
| 3 | NOVIEEX 27 kW 7.4 GPM Tankless Water Heater Best budget | Whole-house hot water with high electrical capacity | Check price of NOVIEEX 27 kW 7.4 GPM Tankless Water Heater on Amazon |
| 4 | Novieex 3.6 GPM Propane Tankless Water Heater Best propane | indoor precision temperature control | Check price of Novieex 3.6 GPM Propane Tankless Water Heater on Amazon |
Our 4 picks
Novieex 4.3 GPM Indoor Natural Gas Water Heater
Best for: small indoor spaces with natural gas
- Fuel Type
- Natural Gas
- Flow Rate
- Up to 4.3 GPM
- BTU
- 100,000 BTU
- Installation Location
- Indoor
- Voltage
- 110V-120V
- Temperature Control
- 95°F to 149°F, ±1°F
View on Amazon: Novieex 4.3 GPM Indoor Natural Gas Water Heater Affiliate link
This NOVIEEX unit delivers 4.3 GPM of hot water using 100,000 BTU of natural gas power. It features precise temperature control within ±1°F, ranging from 95°F to 149°F. The compact design measures 28.5 x 17.3 x 10.8 inches and weighs 19.8 pounds. You can mount it indoors in utility rooms or closets. It requires 110V-120V AC power and professional installation with 1/2" NPT fittings.
Pros
- Delivers up to 4.3 GPM flow rate for simultaneous use
- Precise ±1°F temperature control via digital thermostat
- Compact wall-mounted design saves over 50% space
- LED touchscreen interface for easy operation
Cons
- Indoor installation only
- Recommended for altitudes below 2000 feet
- Requires professional installation by a licensed technician
Good fit if
- You need a compact indoor unit for a single bathroom or kitchen
- You want precise temperature stability within ±1°F
- You have access to natural gas and 110V-120V power
Skip if
- You require outdoor installation capabilities
- You live at an altitude above 2000 feet
- You need a flow rate higher than 4.3 GPM
Verdict: NOVIEEX 4.3 GPM Natural Gas Heater suits small indoor spaces where precise temperature control and compact dimensions matter more than high-volume flow.
NOVIEEX 13kW 240V Electric Tankless Water Heater
Best for: Single bathroom electric installations
- 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 13kW electric unit delivers up to 3.6 GPM at 240V. It features precise temperature control from 77°F to 140°F in 1°F increments. The compact design saves space for single-bathroom homes. You get endless hot water with 99.8% efficiency. It requires a 60A circuit and 6 AWG wiring. This model suits tight spaces where power is available.
Pros
- 13kW power output for high-demand heating
- 3.6 GPM maximum flow rate
- Precise 1°F temperature adjustment increments
- 99.8% heating efficiency eliminates standby loss
- Compact 11.14" W x 15.86" H profile
Cons
- Requires a dedicated 60A double-pole circuit breaker
- Indoor installation only
- Maximum flow rate of 3.6 GPM limits simultaneous multi-fixture use
Good fit if
- You need hot water for a single bathroom
- You have the electrical capacity for a 60A circuit
- You want precise temperature control in 1°F steps
Skip if
- You require outdoor installation
- You cannot install a 60A circuit breaker
- You need more than 3.6 GPM for multiple fixtures
Verdict: NOVIEEX 13kW Electric Tankless Heater fits single-bathroom homes with adequate electrical infrastructure. You get precise temperature control and high efficiency in a compact footprint.
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 27kW electric unit delivers up to 7.4 GPM for whole-house use. It operates on 240V power with a compact 14.13-inch width. The LED display allows precise temperature control in 1°F increments from 77°F to 140°F. It fits indoor spaces and saves space compared to storage tanks. You need three 40A breakers and 8 AWG wires for installation. This model suits homes with strong electrical infrastructure.
Pros
- High flow rate of 7.4 GPM supports multiple simultaneous uses
- Precise temperature control with 1°F increments on LED display
- Compact wall-mount design saves space compared to storage tanks
- 99.8% energy conversion efficiency eliminates standby heat loss
Cons
- Requires three 40A double-pole circuit breakers and 8 AWG wires
- Indoor installation only due to IPX4 rating
- Maximum temperature of 140°F may limit high-heat needs
Good fit if
- You have a dedicated 240V electrical system with three 40A breakers
- You need hot water for three to four fixtures simultaneously
- You want precise temperature adjustments in small increments
Skip if
- You cannot install three 40A double-pole circuit breakers
- You need outdoor installation capability
- Your electrical panel lacks capacity for 112.5A total current
Verdict: NOVIEEX 27kW Electric Tankless Water Heater fits homes with robust 240V electrical systems needing high flow for multiple bathrooms. It offers precise control and space savings for users who can handle the wiring requirements.
Novieex 3.6 GPM Propane Tankless Water Heater
Best for: indoor precision temperature control
- Fuel Type
- Propane
- Flow Rate
- 3.6 GPM
- BTU
- 86,000 BTU
- Installation Location
- Indoor
- Voltage
- 110V-120V AC/60Hz
- Temperature Control
- 95°F to 149°F, ±1°F
View on Amazon: Novieex 3.6 GPM Propane Tankless Water Heater Affiliate link
This NOVIEEX unit delivers up to 3.6 GPM of hot water using 86,000 BTU of propane power. It features a digital thermostat with ±1°F precision and an adjustable range from 95°F to 149°F. The compact, wall-mounted design saves space in utility rooms or closets. It includes an LED touchscreen and multi-protection safety systems. This model is ideal for indoor use where precise temperature control and efficient propane heating are priorities.
Pros
- 86,000 BTU output for simultaneous fixture use
- ±1°F digital temperature precision
- Wall-mounted compact design saves space
- LED touchscreen interface for easy operation
Cons
- Indoor installation only
- Recommended for altitudes below 2000 feet
- Requires professional installation with licensed technician
Good fit if
- You need precise temperature control for sensitive skin
- You have limited space in an indoor utility area
- You want to run a shower and sink simultaneously
Skip if
- You require outdoor installation capability
- You live at an altitude above 2000 feet
- You prefer DIY installation without a licensed technician
Verdict: NOVIEEX 3.6 GPM Propane Tankless Heater offers precise digital control and compact indoor efficiency for households needing reliable simultaneous hot water.
Specifications side by side
| Spec | Novieex 4.3 GPM Indoor Natural Gas Water Heater | NOVIEEX 13kW 240V Electric Tankless Water Heater | NOVIEEX 27 kW 7.4 GPM Tankless Water Heater | Novieex 3.6 GPM Propane Tankless Water Heater |
|---|---|---|---|---|
| Fuel Type | Natural Gas | Electric | Electric | Propane |
| Flow Rate | Up to 4.3 GPM | 3.6 GPM | 7.4 GPM | 3.6 GPM |
| BTU | 100,000 BTU | not stated | not stated | 86,000 BTU |
| Wattage | not stated | 13kW | 27kW | not stated |
| Installation Location | Indoor | Indoor | Indoor | Indoor |
| Voltage | 110V-120V | 240V | 240V | 110V-120V AC/60Hz |
| Temperature Control | 95°F to 149°F, ±1°F | 77°F to 140°F, 1°F increments | 77°F to 140°F, 1°F increments | 95°F to 149°F, ±1°F |
| Dimensions | 10.8 x 17.3 x 28.5 inches | 15.86" H x 11.14" W x 3.18" D | 14.13 W × 15.86 H × 3.18 D in | 28.5 x 17.3 x 10.8 in |
| Use | not stated | not stated | Whole House | not stated |
| Weight | 19.8 pounds | not stated | not stated | 19.8 pounds |
| Size | 4.3GPM Nature gas | not stated | 27 kW | 3.6GPM Propane |
| Color | Pearl Grey | Silver | Silver | Gray |
| Model | RS-16 | DS-18 | DS-18 | RS-13 |
NOVIEEX Tankless Water Heaters at a Glance
The NOVIEEX lineup splits into natural gas, propane, and electric categories. The RS-16 Natural Gas model delivers 4.3 GPM for small indoor spaces. The RS-13 Propane unit offers 3.6 GPM with precise digital control. Both share identical compact dimensions, measuring 17.3 by 10.8 inches. These gas options suit users with existing fuel lines who need reliable indoor heating.
Electric choices use 240V power. The DS-18 13kW model fits single bathrooms with its narrow 11.1-inch width. The higher-capacity 27kW DS-18 handles whole-house demand with a 7.4 GPM flow rate. These units are slightly wider but remain space-efficient. You should match the wattage to your electrical capacity and hot water needs.
Who NOVIEEX Range Suits
NOVIEEX offers four indoor tankless models. You can choose between gas, propane, or electric power. The smallest unit is the 13kW electric heater, measuring 11.1 by 11.1 inches. The largest is the 27kW electric model at 14.1 by 14.1 inches. Gas and propane units share a larger footprint of 28.5 inches in length. All units are compact and vertical. You get precise temperature control across the board. None of these models are rated for outdoor use. You also will not find whole-house gas options here. Your choice depends on your fuel source and available electrical capacity.
How to choose the right one
-
Match fuel to source
Start by identifying your available energy source. NOVIEEX offers natural gas, propane, and electric options. If you have existing gas lines, the RS-16 Natural Gas model provides 4.3 GPM for small indoor spaces. For propane users, the RS-13 delivers 3.6 GPM with precise digital control. Electric models require dedicated circuits. Verify your home supplies the correct fuel type before selecting a unit to avoid costly retrofitting or incompatibility issues.
-
Check installation location
All NOVIEEX models listed are designed for indoor installation. This limits placement options to interior walls with proper ventilation or electrical access. The RS-16 Natural Gas heater measures 17.3 inches wide and 28.5 inches long. The RS-13 Propane unit shares these exact dimensions. Electric models are more compact. Ensure your chosen indoor space accommodates the required clearances and fits the physical footprint of your selected model without obstruction.
-
Determine flow needs
Flow rate dictates how many fixtures run simultaneously. The RS-16 Natural Gas model offers 4.3 GPM, suitable for small spaces where high volume is not critical. The RS-13 Propane unit provides 3.6 GPM. Electric options rely on wattage rather than GPM ratings in the data. If you need hot water for multiple bathrooms, the 27kW electric model supports whole-house use. Match the flow or power to your peak usage demands.
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Verify electrical capacity
Electric tankless heaters demand significant power. The 13kW model requires a 240V circuit and suits single-bathroom homes with adequate infrastructure. The 27kW whole-house unit also uses 240V but needs a robust electrical system. If your home lacks sufficient amperage or panel space, these electric models may not work. Check your electrical panel specifications before purchasing. Gas and propane units do not require these high-voltage connections.
-
Measure physical space
Tankless units are compact but require specific dimensions. The RS-16 and RS-13 share identical sizes: 17.3 inches wide, 10.8 inches high, and 28.5 inches long. They weigh 19.8 pounds. The 13kW electric model is smaller at 11.1 inches square. The 27kW electric unit measures 14.1 inches square. Measure your installation area carefully. Ensure the chosen model fits within your designated space while allowing access for maintenance and service connections.
Frequently asked questions
Which NOVIEEX tankless water heater is best for small indoor spaces?
The NOVIEEX 4.3 GPM Indoor Natural Gas Water Heater is the top choice. It delivers 4.3 gallons per minute, making it suitable for small areas. Its compact dimensions of 17.3 by 28.5 inches fit tight spots. This model offers precise temperature control for reliable performance.
What is the best budget-friendly electric option from NOVIEEX?
The NOVIEEX 13kW 240V Electric Tankless Water Heater serves as the best budget pick. It provides 13 kW of power for single-bathroom installations. The unit measures 11.1 by 11.1 inches, saving space. You get precise temperature control in a compact silver footprint.
Which model handles whole-house hot water needs?
The NOVIEEX 27 kW 7.4 GPM Tankless Water Heater is designed for whole-house use. It delivers 7.4 gallons per minute for multiple bathrooms. This 27 kW electric model requires a robust 240V electrical system. Its dimensions are 14.1 by 14.1 inches.
Is there a propane tankless water heater available from NOVIEEX?
Yes, the NOVIEEX 3.6 GPM Propane Tankless Water Heater is available. It offers 3.6 gallons per minute for indoor precision temperature control. The unit measures 17.3 by 28.5 inches and weighs 19.8 pounds. It provides reliable simultaneous hot water for households using propane.
How do the dimensions compare across NOVIEEX models?
Dimensions vary by fuel type. The electric 13kW model is the most compact at 11.1 by 11.1 inches. The 27kW electric model measures 14.1 by 14.1 inches. The gas and propane units share larger footprints of 17.3 by 28.5 inches. Check your space before installing.
What voltage do the electric NOVIEEX heaters require?
Both electric models require 240V power. The 13kW unit suits single bathrooms with adequate electrical infrastructure. The 27kW whole-house model needs a robust 240V system to handle its 27 kW output. Ensure your home wiring supports the required voltage for safe operation.
Which NOVIEEX heater offers the highest flow rate?
The NOVIEEX 27 kW 7.4 GPM Tankless Water Heater offers the highest flow rate. It delivers 7.4 gallons per minute, ideal for high-demand households. The natural gas model follows with 4.3 GPM. The propane unit provides 3.6 GPM, while the small electric model has lower output.
Can I install NOVIEEX tankless heaters outdoors?
All listed NOVIEEX models are designed for indoor installation. The specifications explicitly state indoor use for gas, propane, and electric units. You should not install these specific models outdoors. Choose a location with proper ventilation and access to the required fuel or electrical connections.