Is 18 kW enough for a whole house?

No. Senville sizes this unit for point-of-use and small-zone use, such as a bathroom, sink or workshop. Whole-house demand from several fixtures at once calls for a larger, multi-unit or differently specified system.

What electrical supply does it need?

It runs on 208–240 V. An 18 kW unit draws high current, so it needs a dedicated circuit sized for that load, and many homes need an electrical panel upgrade before install.

Does it work without a storage tank?

Yes. It heats water only when flow is detected, so there is no tank to keep hot and no standby loss from a stored supply. Hot water arrives on demand at the fixture it serves.

Where can it be installed?

It is an indoor wall-mounted unit for utility rooms, condos, cabins, apartments and workshops. Mount it near the fixture or zone it serves so hot water does not travel far through the pipes.

What comes in the box?

The heater, wall-mount hardware, and user and installation documentation. Plumbing and electrical fittings for the install are not included.

How does it compare with a tank heater?

It frees the floor space a tank takes and avoids keeping a tank hot all day. In return it needs a high-amperage electrical supply and delivers hot water only as fast as its 18 kW can heat the flow.

Senville 18kW Electric Tankless Water Heater Price History: $39.70

Q: Where is the Senville SENWH-DSF18-0EG 18kW Electric Tankless Water Heater cheapest?

At Geary Sales, for $39.70, 87% under what the other stores charge, as of our latest check.

Q: Where can I buy the Senville SENWH-DSF18-0EG 18kW Electric Tankless Water Heater?

8 stores we checked sell it, including Geary Sales, Amazon, Senville, Walmart, Best Buy.

From Home Outlet Direct

18 kW electric heating for higher-demand point-of-use and small-zone use
Heats water only when flow is detected, so hot water is on demand
Tankless design can reduce standby energy loss versus a storage tank
Compact indoor wall-mounted unit frees up floor space
Built-in safety features such as temperature monitoring and overheat safeguards
Suited to sinks, bathrooms, offices, workshops and other smaller hot water zones

Guarantee: 5 Year manufacturer warranty.
Returns: 30-Day Return Policy: return requests must be submitted within 30 days of delivery; products must be unused, uninstalled and in original packaging; a restocking
Shipping: Free shipping on all orders; small items ship via standard ground delivery (FedEx or similar).
In the box: Senville 18 kW Electric Tankless Water Heater, Wall-mount hardware, User and installation documentation

About the Senville SENWH-DSF18-0EG 18kW Electric Tankless Water Heater

The Senville 18 kW Electric Tankless Water Heater is a compact, wall-mounted unit that supplies hot water on demand. It heats water only when it detects flow, so there is no storage tank to keep hot all day. This can reduce standby energy loss compared with a traditional storage tank heater.

It is built for higher-demand point-of-use and small-zone applications, such as near a sink, a bathroom, an office space or a workshop. Without a tank, it frees up floor space in utility rooms, condos, cabins and apartments. Built-in safety features include temperature monitoring and overheat safeguards.

Professional installation is recommended. The unit needs properly sized breakers and wiring, and installation must comply with local electrical codes. It is designed for indoor wall-mounted installation.

Power: 18 kW
Voltage: 208~240 V
Power source: Electric
Type: Tankless, point of use
Installation: Indoor, wall-mounted
Safety: Temperature monitoring and overheat safeguards
Warranty: 5 years, manufacturer
In the box: Water heater, wall-mount hardware, user and installation documentation
Not included: Plumbing fittings and electrical components
Prop 65: Carries a California Proposition 65 warning