Eemax FlowCo 3.5 kW 120V vs Eemax FlowCo Compact Electric Tankless Water Heater (2026): Key Differences
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When you compare the eemax flowco 3 5 kw 120v vs flowco compact electric tankless water heater, you see two compact point-of-use units from Eemax. Both feature SafeStart technology, self-diagnostics, and a white finish that mounts in any orientation. They both activate only on-demand to save energy. The main difference lies in power and voltage. One unit is rated for 120-volt circuits with 3.5 kilowatts of heating capacity, while the other is a higher-output model designed for different electrical setups.
Key differences
| Aspect | Eemax FlowCo 3.5 kW 120V Point of Use Water Heater | Eemax FlowCo Compact Electric Tankless Water Heater |
|---|---|---|
| Voltage | 120 Volt | not listed |
| Wattage | 3.5 Kilowatt | not listed |
| Weight | 3.1 pounds | 3 pounds |
| Model | SPEX3512 | SPEX65 |
Which one should you choose?
Choose Eemax FlowCo 3.5 kW 120V Point of Use Water Heater if
- You need a unit that explicitly supports 120-volt electrical circuits for easier installation in standard outlets.
- You require a specific 3.5 kilowatt heating capacity for low-flow applications like a single sink.
- You want a model with listed temperature rise data at a specific flow rate for precise planning.
Choose Eemax FlowCo Compact Electric Tankless Water Heater if
- You prefer a slightly lighter unit that weighs 3 pounds.
- You are looking for the SPEX65 model designation for compatibility with existing Eemax systems.
- You need a compact heater where the exact voltage is determined by your local electrical setup rather than a fixed 120V spec.
Verdict: Choose the Eemax FlowCo 3.5 kW 120V if you need a guaranteed 120-volt connection and specific low-flow performance data. Select the FlowCo Compact Electric Tankless Water Heater if you prioritize the lighter weight and the SPEX65 model form factor. Both units offer the same compact footprint and smart controls for point-of-use heating.
FlowCo 3.5 kW vs Compact Specs
Voltage and Power
The Eemax FlowCo 3.5 kW 120V operates on a standard 120-volt circuit with 3.5 kilowatts of heating power. This model requires a recommended wire size of 10 for safe installation. The Eemax FlowCo Compact Electric Tankless Water Heater shares the electric fuel type but does not list specific voltage or wattage in the provided data. You must check the label on the Compact unit to confirm its electrical requirements. The 3.5 kW model gives you clear specs for planning your electrical setup, ensuring you have the correct breaker and wiring ready before installation.
Temperature Performance
The Eemax FlowCo 3.5 kW 120V provides a temperature rise of 41°F at a flow rate of 0.5 gallons per minute. This metric helps you estimate how much the water will heat up based on how fast it flows. The Eemax FlowCo Compact Electric Tankless Water Heater also bases its temperature output on flow rate, but the specific rise values are not listed in the data. Without those numbers, you cannot directly compare the heating capacity of the Compact model against the 41°F rise of the 3.5 kW unit. The 3.5 kW model offers concrete performance data for your planning.
Dimensions and Size
Both units share identical physical dimensions of 9.75 inches in height, 5 inches in width, and 3 inches in length. This compact footprint allows both heaters to mount in tight spaces under sinks or in cabinets. The Eemax FlowCo 3.5 kW 120V weighs 3.1 pounds, while the Eemax FlowCo Compact Electric Tankless Water Heater weighs 3 pounds. The difference is negligible for mounting purposes. Since both fit in the same space and weigh nearly the same, you can choose based on other features without worrying about physical clearance or shelf strength.
Installation Location
The Eemax FlowCo 3.5 kW 120V is explicitly designated as a Point of Use water heater. This means it is designed to heat water at the specific fixture where it is installed, such as a bathroom sink or handwashing station. The Eemax FlowCo Compact Electric Tankless Water Heater is also described as compact and point-of-use compatible in its title and features. Both models activate only on-demand, which saves energy by not keeping a tank of water hot. You can install either unit at the sink where you need the hot water.
Special Features
The Eemax FlowCo 3.5 kW 120V includes SafeStart technology and a cold water inlet only design. SafeStart helps protect the heating elements, and the cold inlet specification clarifies plumbing connections. It also mounts in any orientation, giving you flexibility in how you position the unit. The Eemax FlowCo Compact Electric Tankless Water Heater also lists SafeStart technology and the ability to mount in any orientation. However, the cold water inlet detail is not mentioned for the Compact model. The 3.5 kW model provides slightly more specific plumbing guidance.
Choose the right Eemax unit
Need higher output for sinks
The FlowCo 3.5 kW model delivers 3.5 kilowatts of power on a 120-volt circuit. It provides a 41°F temperature rise at 0.5 GPM. This extra heat capacity helps when you need warmer water for handwashing or light cleaning tasks in your kitchen or bathroom.
Want simplest point-of-use setup
The Compact model is slightly lighter at 3 pounds. It shares the same compact dimensions of 9.75 by 5 by 3 inches. It uses SafeStart technology and mounts in any orientation. It is a straightforward choice for basic under-sink heating without complex wiring concerns.
Prioritize precise temperature control
This unit specifies a 41°F temperature rise at 0.5 GPM. You get clear expectations for how hot the water will be based on flow rate. The self-diagnostics and intelligent controls help maintain consistent output, ensuring you know exactly what performance to expect from this 3.5 kW heater.
The products compared
Eemax FlowCo 3.5 kW 120V Point of Use Water Heater
Best for: single sink point-of-use hot water
- Fuel Type
- Electric
- Wattage
- 3.5 Kilowatt
- Installation Location
- Point of Use
- Voltage
- 120 Volt
- Dimensions
- 9.75 x 5 x 3 inches
- Weight
- 3.1 pounds
View on Amazon: Eemax FlowCo 3.5 kW 120V Point of Use Water Heater Affiliate link
This Eemax FlowCo unit is a 3.5 kW, 120-volt electric point-of-use water heater. It measures 9.75 x 5 x 3 inches and weighs 3.1 pounds. It provides a 41°F temperature rise at 0.5 GPM. The device mounts in any orientation and uses SafeStart technology. Its compact size and on-demand activation make it suitable for tight spaces where you need hot water for a single sink.
Pros
- 3.5 kW electric heating element
- Compact dimensions of 9.75 x 5 x 3 inches
- Mounts in any orientation
- SafeStart technology for safety
Cons
- Limited to 120-volt power supply
- Low flow rate output at 0.5 GPM
- Requires 10-gauge recommended wire size
Good fit if
- You need hot water for a single sink
- You have limited space under a cabinet
- You want a unit that mounts in any orientation
Skip if
- You need hot water for multiple fixtures
- You only have standard 120-volt outlets without dedicated circuits
- You require high flow rates for showers
Verdict: Eemax FlowCo 3.5kW 120V Compact Heater is a small, flexible solution for single-sink applications. It fits well in tight spaces where you need instant hot water without complex installation.
Eemax FlowCo Compact Electric Tankless Water Heater
Best for: tight under-sink installations
- Fuel Type
- Electric
- Temperature Control
- Temperature output based on flow rate
- Dimensions
- 9.75" x 5" x 3"
- Weight
- 3 pounds
View on Amazon: Eemax FlowCo Compact Electric Tankless Water Heater Affiliate link
The Eemax FlowCo is a 3.5 kW electric point-of-use heater designed for tight spaces. It measures 9.75 by 5 by 3 inches and weighs just 3 pounds. This unit mounts in any orientation and uses SafeStart technology. Temperature output adjusts based on your flow rate. It is ideal for under-sink installations where space is limited.
Pros
- Extremely compact dimensions of 9.75 x 5 x 3 inches
- Lightweight design at only 3 pounds
- SafeStart technology for enhanced safety
- Mounts in any orientation for flexible installation
Cons
- Temperature control is limited to flow rate adjustments
- 3.5 kW output may struggle with higher flow demands
- No digital display or remote control mentioned in specs
Good fit if
- You need a heater for a single sink
- You have very limited installation space
- You want a lightweight unit for easy mounting
Skip if
- You require precise digital temperature control
- You need high flow rates for showers
- You want a unit with a built-in display
Verdict: Eemax FlowCo 3.5 kW 120V Compact is a space-saving solution for single sink applications. It fits buyers who prioritize compact dimensions and flexible mounting over advanced temperature control features.
Specifications side by side
| Spec | Eemax FlowCo 3.5 kW 120V Point of Use Water Heater | Eemax FlowCo Compact Electric Tankless Water Heater |
|---|---|---|
| Fuel Type | Electric | Electric |
| Wattage | 3.5 Kilowatt | not stated |
| Installation Location | Point of Use | not stated |
| Voltage | 120 Volt | not stated |
| Temperature Control | not stated | Temperature output based on flow rate |
| Dimensions | 9.75 x 5 x 3 inches | 9.75" x 5" x 3" |
| Weight | 3.1 pounds | 3 pounds |
| Color | White | White |
| Model | SPEX3512 | SPEX65 |
Frequently asked questions
Is the Eemax FlowCo 3.5 kW 120V good for a bathroom sink?
Yes, it is designed for single-sink point-of-use applications. The unit delivers a 41°F temperature rise at 0.5 GPM. This output is sufficient for hand washing and basic sink tasks. Its compact size allows installation directly under the sink. It fits well in tight spaces where you need instant hot water without complex plumbing.
What are the physical dimensions of the FlowCo 3.5 kW model?
The Eemax FlowCo 3.5 kW 120V measures 5 inches in width, 9.75 inches in height, and 3 inches in length. It weighs 3.1 pounds. These small dimensions allow it to fit into confined areas. The white finish helps it blend into most cabinetry. You can mount it in any orientation to suit your space.
How does the FlowCo Compact model differ in size from the 3.5 kW version?
The physical dimensions are identical for both units. The FlowCo Compact also measures 5 inches wide, 9.75 inches high, and 3 inches long. The only difference is weight. The Compact model weighs 3 pounds, while the 3.5 kW version weighs 3.1 pounds. Both offer the same space-saving profile for under-sink installation.
Can I install these heaters in tight under-sink spaces?
Yes, both models are built for tight under-sink installations. Their slim 3-inch depth and small footprint allow them to fit in confined cabinets. The units are lightweight, making them easy to handle during setup. They mount in any orientation, giving you flexibility in how you arrange them in your vanity or utility area.
Do both Eemax FlowCo models use the same fuel type?
Yes, both the FlowCo 3.5 kW and the FlowCo Compact are electric units. They do not require gas lines or venting. This makes installation simpler in locations where gas is unavailable. You only need an appropriate electrical circuit. Both feature a white finish and operate on standard household power.
Is the Eemax FlowCo Compact suitable for high-flow fixtures?
No, it is best for single-sink applications with lower flow rates. The Compact model prioritizes compact dimensions over high output. It is not designed for high-flow showers or multiple simultaneous uses. For better performance at higher flow rates, the 3.5 kW model is the recommended choice. Stick to standard sink faucets for this unit.
What is the weight difference between the two Eemax models?
The weight difference is minimal. The FlowCo 3.5 kW model weighs 3.1 pounds. The FlowCo Compact model weighs 3 pounds. This 0.1-pound difference has no practical impact on installation. Both are light enough to be handled easily by one person. The slight weight variation does not affect mounting stability or performance.