CAMPLUX Electric Water Heater 6kW 240V On Demand - Instant Sink Hot

In this review of the CAMPLUX Electric Water Heater 6kW 240V, the bottom line is simple: this compact under-sink unit is for anyone who needs near-instant hot water at a sink without a tank. The reviewer found it delivers hot water fast, with a clear LED touch display and smart temperature response to flow changes, making it ideal for kitchen prep, handwashing and outdoor sink setups. It is a true point-of-use heater that saves space and energy, but it requires a permanent 240V hardwired installation and is not suitable for bathing.

Key Features

• On demand heating: Heats water only when needed so there is no waiting to preheat and it can reduce energy use compared with a continuously heated tank.
• Fast temperature rise: Delivers a temperature rise of about 50F at 1.0 GPM, providing usable hot water quickly for sink tasks.
• Digital touch control: Real-time LED display and touch controls make it easy to set and monitor outlet temperature while adjusting for flow.
• Durable water path: 304 food-grade stainless steel water tube reduces concerns about scaling and extends functional life with hard water.
• Compact, point-of-use design: Small footprint fits under most sinks and is designed to be mounted vertically near the outlet for minimal heat loss.
• Safety features: Built-in protections include anti-leakage, waterproofing, overheat protection and dry combustion protection for safer operation.

Who It's For

This unit is best for homeowners, RV owners, van lifers or anyone who needs a dedicated hot water source at a sink or outdoor station where a compact, point-of-use heater makes sense. It works well for kitchen prep, washing vegetables, cleaning dishes and handwashing where quick hot water is wanted without a large tank.

It is not for people who want a whole-house solution or a shower/bath supply; the product is explicitly rated for sink use only and has a limited flow range that will not support bathing. Also, buyers should be comfortable arranging a 240V hardwired installation to a dedicated breaker.

Pros & Cons

Pros

• Fast warm-up and consistent hot water at sink flow rates for immediate use.
• Compact size and vertical mount make under-sink installation straightforward when space allows.
• Clear LED touch display for easy temperature monitoring and adjustment.
• 304 stainless water tube and multiple safety protections improve durability and safety.

Cons

• Must be hard wired to a 240V circuit with the correct breaker; no plug is provided.
• Not suitable for bathing or high-flow applications; limited to sink use and lower GPM ranges.

Specifications

Wattage	6kW
Voltage	240V
Required breaker	35A recommended (unit draws up to 25A)
Wire gauge	12AWG minimum
Water flow range	0.26 GPM - 1.8 GPM
Temp rise range	86F - 131F
Dimensions (L x W x H)	10.95 in x 7.4 in x 2.52 in

Our Verdict

The CAMPLUX 6kW on demand unit is a strong value for anyone needing instant hot water at a sink and willing to install a permanent 240V connection. Its fast temperature rise, compact footprint and safety features make it a practical choice for kitchens, outdoor sinks and small point-of-use needs, but it is not a replacement for shower or whole-house heaters.

Frequently Asked Questions

Can this unit be plugged in?
The unit must be hard wired to a dedicated 240V circuit and cannot use a plug; a 12AWG minimum feed and appropriate breaker are required.

Is it safe to use with hard water?
The water tube is 304 food-grade stainless steel to reduce scaling concerns, and the unit includes safety protections like overheat and dry combustion prevention.

Can it support showering?
No, this model is designed for sink use only and does not provide the flow or sustained output needed for bathing.