Eemax SP35 Tankless Water Heater Review: Who It Fits and Who Should Skip It
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This eemax sp35 tankless water heater review focuses on a compact, single-point unit designed for hand washing. It delivers 3.5kW of power at 240V, heating water at a flow rate of 0.5 GPM. The device provides a 48°F temperature rise at that specific flow. Its small footprint measures 10.75 inches wide, 5.25 inches high, and 3 inches deep. This model is built for installation under a single lavatory sink. It requires only one cold water line and no temperature and pressure relief valve. The unit weighs just 3 pounds and connects via 3/8-inch compression fittings.
What stands out
- 3.5kW heating element for rapid on-demand hot water
- Compact 10.75 x 5.25 x 3 inch dimensions fit tight spaces
- Single-point design eliminates need for T and P valve
- Simple 3/8-inch compression fittings for easy plumbing connection
- 48°F temperature rise at 0.5 GPM flow rate
Who it fits
Good fit for
You should choose this heater if you need hot water for a single bathroom sink or small lavatory. It suits homes where space is limited under the counter. The 0.5 GPM flow rate is ideal for hand washing and light face rinsing. If you want a simple, wall-mounted solution without complex piping, this unit fits your needs. It works well in apartments or small bathrooms where a full household tankless system is unnecessary or too large.
Who should skip it
Skip this model if you need hot water for a shower, kitchen sink, or multiple fixtures. The 0.5 GPM flow rate is too low for bathing or filling large containers. It is not suitable for whole-house applications. If you require higher temperature rises or greater flow capacity, this single-point unit will not meet your demands. Look for a larger, higher-kilowatt tankless heater for those tasks.
Verdict: The Eemax SP35 is a specialized, space-saving solution for single-sink hot water needs. It delivers reliable performance for hand washing but cannot support higher flow demands.
Key specs explained for Eemax SP35
Voltage: 240V
You need a dedicated 240-volt electrical circuit to power this unit. Most standard household outlets provide 120V, so you must verify your home’s wiring supports this higher voltage. This requirement means you likely need an electrician to install a new breaker. It is not a plug-and-play device for standard kitchen or bathroom outlets.
Wattage: 3.5kW
The 3.5-kilowatt heating element determines how much thermal energy is added to the water. This power level is modest for tankless heaters, which often range from 11kW to 27kW. It limits the unit to low-flow applications. You cannot expect to heat water for a shower or bathtub with this wattage. It is designed strictly for small tasks like hand washing.
Flow Rate: 0.5 GPM
This unit only heats water flowing at half a gallon per minute. This low flow rate confirms it is a single-point heater. You must use a low-flow faucet aerator to maintain this rate. If you open the tap fully, the water will not get hot. It is unsuitable for sinks that require high-volume water for filling pots or rinsing dishes.
Temperature Control: 48°F rise at 0.5 GPM
The heater increases water temperature by 48 degrees Fahrenheit at the specified flow. If your incoming water is 50°F, the output will be 98°F. This rise is sufficient for hand washing but may feel lukewarm in cold climates. You should compare this rise with other single-point models to ensure it meets your local groundwater temperature needs.
Dimensions: 10.75 x 5.25 x 3 inches
The compact footprint allows installation under small lavatories or in tight utility closets. The depth of only three inches makes it easy to mount on a wall without protruding significantly. You can fit this unit where larger tankless heaters would not. Check your cabinet space to ensure the width and height clear any existing pipes or shelves.
Design and build overview
According to the listing, the Eemax SP35 features a white finish. The unit measures 10.75 inches wide, 5.25 inches high, and 3 inches deep. It weighs only 3 pounds. This small footprint allows it to mount directly above a sink. You can place it in tight spaces where larger units would not fit. The compact design keeps the plumbing lines short. Shorter lines mean less heat loss before the water reaches your hands.
The device uses 3/8-inch compression fittings at the top. These connections require only one cold water line to the lavatory. You do not need a temperature and pressure relief valve for this installation. This simplifies the setup compared to whole-house systems. The single-point design targets hand washing tasks specifically. It is not intended for showers or kitchen sinks with higher flow demands.
The control interface is minimal. The unit relies on the 240V, 3.5kW power rating to heat water. It provides a 48°F temperature rise at 0.5 GPM. This specific rise ensures the water is warm enough for washing hands. The straightforward build means fewer parts that could fail. You get a simple, reliable solution for point-of-use heating. The white casing blends into most bathroom environments. The low weight makes mounting easy for most homeowners.
Setup and everyday use
Installation focuses on simplicity for a single-point application. You connect one cold water line directly to the unit. The listing notes that no temperature and pressure relief valve is required for this setup. This reduces the complexity of the plumbing work compared to larger whole-house systems. The water connections use 3/8-inch compression fittings located at the top of the device. This specific fitting size is standard for many lavatory supply lines, which may simplify your material list. The compact dimensions of 10.75 inches wide and 3 inches deep allow it to fit in tight spaces above a sink. The white finish helps it blend into most bathroom decor. For daily use, this unit is designed exclusively for hand washing. It operates at a flow rate of 0.5 gallons per minute. At this specific flow, the heater provides a temperature rise of 48 degrees Fahrenheit. This means it heats water effectively for tasks like washing hands or face. It does not support higher flow rates. You cannot use this unit for showering or filling a bathtub. The 3.5kW power output at 240V ensures consistent heating for low-volume tasks. You should verify that your electrical circuit can handle the dedicated 240-volt requirement before installation. The small size and straightforward connections make it a practical choice for under-sink applications where space is limited and water usage is minimal.
Before you buy the Eemax SP35
This unit is a single-point heater, meaning it serves only one faucet. You must verify that your electrical panel can support a dedicated 240V circuit. Standard 120V outlets will not work. You also need to confirm the plumbing fits the 3/8-inch compression fittings. Since it heats water at 0.5 GPM, it is not suitable for showers or tubs. It is best for hand washing sinks where flow is low. You should check if your local codes allow installation without a temperature and pressure relief valve. The small size allows mounting above the sink, but ensure you have enough clearance. Unlike whole-house units, this device does not heat water for multiple fixtures simultaneously. It is a niche solution for specific, low-flow applications. If you need hot water for a shower, look at higher-capacity models. This heater fits only in tight spaces with the right electrical setup.
Check before you buy
- Verify you have a dedicated 240V electrical circuit available.
- Confirm your sink plumbing accepts 3/8-inch compression fittings.
- Ensure the location allows for a 10.75-inch wide mount.
- Check local codes regarding relief valve requirements.
The product at a glance
Eemax Single-Point Handwashing Tankless Water Heater
Best for: Single sink hand washing
- Flow Rate
- 0.5 GPM
- Wattage
- 3.5kW
- Voltage
- 240V
- Temperature Control
- 48°F rise at 0.5 GPM
- Dimensions
- 10.75 x 5.25 x 3 inches
- Weight
- 3 pounds
View on Amazon: Eemax Single-Point Handwashing Tankless Water Heater Affiliate link
The Eemax SP35 is a single-point tankless water heater designed for hand washing sinks. It operates on 240V power with 3.5kW capacity. The unit delivers a 48°F temperature rise at 0.5 GPM flow. Its compact 10.75 x 5.25 x 3-inch footprint fits tight spaces. It requires no T and P valve, simplifying installation by using only one cold water line.
Pros
- 3.5kW power output for consistent heating
- Compact 10.75 x 5.25 x 3-inch size
- No T and P valve required for installation
- Single cold water line connection
Cons
- Limited to 0.5 GPM flow rate
- Requires 240V electrical circuit
- Designed only for single-point use
Good fit if
- You need hot water for a single sink
- You have limited space under a lavatory
- You want simplified installation without extra valves
Skip if
- You need hot water for multiple fixtures
- You only have a 120V outlet available
- You require high flow rates for showers
Verdict: Eemax SP35 Compact Hand Washing Unit is a specialized solution for single sinks. It fits buyers who need compact, efficient heating for hand washing only.
Specifications side by side
| Spec | Eemax Single-Point Handwashing Tankless Water Heater |
|---|---|
| Flow Rate | 0.5 GPM |
| Wattage | 3.5kW |
| Voltage | 240V |
| Temperature Control | 48°F rise at 0.5 GPM |
| Dimensions | 10.75 x 5.25 x 3 inches |
| Weight | 3 pounds |
| Size | not_applicable |
| Color | White |
| Model | SP35 |
Frequently asked questions
Can the Eemax SP35 heat water for a kitchen sink?
No. This unit is designed for single-point hand washing. It delivers 0.5 gallons per minute at a 48°F temperature rise. This flow is insufficient for washing dishes or filling pots. You should choose a higher-flow model for kitchen tasks.
Does the SP35 require a gas line for installation?
No. It is an electric unit that operates on 240V. You need a dedicated 240-volt electrical circuit. Standard 120V outlets will not power it. You must verify your home’s wiring supports this voltage before purchasing.
Is a temperature and pressure relief valve needed?
No. The listing states that no relief valve is required for this setup. This reduces plumbing complexity. You connect one cold water line directly to the unit. This simplifies the installation process for a single faucet.
How much space does the heater take up?
It is very compact. The unit measures 10.8 inches wide, 5.25 inches high, and 3 inches deep. It weighs only 3 pounds. This small footprint allows you to mount it directly above a sink without taking up much room.
What is the maximum flow rate of this heater?
The maximum flow rate is 0.5 gallons per minute. It provides a 48°F temperature rise at this specific flow. This output is suitable for hand washing. It is not adequate for showers or tubs which require higher flow.
Can I use this for a bathroom vanity?
Yes. It is ideal for single sinks. The compact design fits above a vanity. It provides warm water for hand washing. You must ensure you have a dedicated 240V circuit available at that location for proper operation.