$742.92
- Can support whole house applications; only one fixture at a time
- Consult electrician and/or plumber; requires 3 x 40-204 volts
- Same-day installation in most areas. Call 1-855-400-2552 by noon.
- View More Details
How to Get It
Product Overview
Ideal for replacing your electric storage tank water heater, the Bosch WH27 electric whole house tankless water heater is compact and powerful and can installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings. Designed to replace a 40 Gal. electric tank, the Bosch WH27 electric tankless water heater is built to last with solid copper heat exchangers, and can help provide homeowners with a lower energy bill.
- Compact, lightweight tankless electric water heater
- Zero standby loss - only heat the water that you need
- Solid copper heat exchanger
- Built-in flow sensor ensures constant output temperature
- External temperature control knob
- Thermal cut-out for safety - protects elements from damage
- Can be installed in several locations
- Also requires 3 separate 40 Amp 2-pole circuit breakers and six #8 AWG wires plus ground, minimum 200 Amp breaker panel (not included)
- Flow sensor to provide a constant output temperature
- 220/240-Volt - 120 Amp
- Requires 3 double pole 40 Amp
- See model WH17 for warmer climate applications and requires less Amp's than WH27
- Click here to check out our buying guide on water heaters
- Click here for more information on Electronic Recycling Programs
- California residents
Additional Resources
From the Manufacturer
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Compare Similar Tankless Electric Water Heaters
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| Brand | EcoSmart | Bosch | Stiebel Eltron | Stiebel Eltron |
| Name | ECO 27 Tankless Electric Water Heater 27 kW 240 V | 27 kW 220/240-Volt 4.0 GPM Whole House Tankless Electric Water Heater | Tempra 29 Plus Adv Flow Control and Self-Modulating 28.8 kW 5.66 GPM Residential Electric Tankless Water Heater | Tempra 36 Plus Advanced Flow Control & Self-Modulating 36 kW 7.03 GPM Compact Residential Electric Tankless Water Heater |
| Price | $53900 | $74292 | $79900 | $84900 |
| Ratings | (1607) | (30) | (24) | (14) |
| Required Volt Connection | 240 volt | 240 volt | 240 volt | 240 volt |
| Application Type | Residential | Residential | Residential | Residential |
| Wattage (watts) | 27000 W | 26850 W | 28800 W | 36000 W |
| Indoor/Outdoor | Indoor | Indoor | Indoor | Indoor |
| Water Heater Features | Wall Mounted | Overheat Protection | Overheat Protection,Wall Mounted | Overheat Protection,Wall Mounted |
| Number of Showers | 1-2 | 1-2 | 1-2 | 1-3 |
| Fuel Type | Electric | Electric | Electric | Electric |
| Efficiency Level | High | |||
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
| Product Depth (in.) | 4.5 in | Product Height (in.) | 12.5 in |
|---|---|---|---|
| Product Width (in.) | 15.25 in | Water Connection Size (in.) | 3/4 in |
Details
| Amperage (amps) | 120 A | Application Type | Residential |
|---|---|---|---|
| Efficiency Level | High | Electricity Phase | Three Phase |
| Finish Family | White | Flow Rate @ 35°F Rise (gallons/min) | 4.5 gal (US)/min |
| Flow Rate @ 45°F Rise (gallons/min) | 4 gal (US)/min | Flow Rate @ 55°F Rise (gallons/min) | 3 gal (US)/min |
| Flow Rate @ 65°F Rise (gallons/min) | 2 gal (US)/min | Fuel Type | Electric |
| Heat Exchanger Warranty | 5 Year | Indoor/Outdoor | Indoor |
| Maximum Temperature (F) | 131 °F | Minimum Activation Rate (gpm) | 0.8 |
| Minimum Temperature (F) | 0 °F | Number of Elements | 3 |
| Number of Showers | 1-2 | Pack Size | 1 |
| Product Weight (lb.) | 22 lb | Required Volt Connection | 240 volt |
| Returnable | 90-Day | Uniform Energy Factor | 0.8 |
| Water Heater Features | Overheat Protection | Wattage (watts) | 26850 W |
Warranty / Certifications
| Certifications and Listings | CSA Listed,UL Listed | Labor Warranty | No Warranty |
|---|---|---|---|
| Part Warranty | 2 Year |
Questions & Answers
Typical questions asked about products:
- Is the product durable?
- Is the product easy to use?
- What are the dimensions of the product?
Customer Reviews
Apr 1, 2020
Replacement for my 12 year old Bosch tankless. Love it.
Replacement for my 12 year old Bosch tankless. Love it.
by
Feb 25, 2020
Product is compact, clean and easy to install. The digital thermometer is nice to have to get ju...
Product is compact, clean and easy to install. The digital thermometer is nice to have to get just the right temp. So far it seems to work fantastic.
by
Jun 1, 2022
Easy to install. Works as advertised...
Easy to install. Works as advertised
by
May 25, 2022
Provides plenty of hot water on demand. My only complaint...
Provides plenty of hot water on demand. My only complaint is that when the electricity goes of the water heater resets to a low temperature of 95º. It is difficult to reach the knob to turn the temperature up with my installation.
by
Apr 13, 2022
Good heater for 3 bedroom house.
Good product for the money spent.
by
Jun 3, 2021
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
Jun 2, 2021
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
Apr 21, 2021
Easy to install, heats water well..
Easy to install, heats water well..
by
Mar 6, 2021
by
Jan 30, 2021
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
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