Optimal OPTI15 Indoor Electric Tankless Water Heater 11.4 L/min

Name: Optimal OPTI15 Indoor Electric Tankless Water Heater 11.4 L/min
Brand: Optimal
Price: 252.45 USD
Availability: InStock

$252.45 $459.00

Taxes included. Shipping calculated at checkout.

Wattage 12000 14500 18000 27000

The Optimal OPTI15 electric tankless water heater delivers continuous on-demand hot water while significantly reducing energy costs by up to 50%. Its compact, wall-mounted profile saves valuable floor space, making it an efficient replacement for bulky conventional storage tanks.

Featuring advanced ultrasonic flow technology and integrated dry-fire protection, this unit ensures reliable, long-lasting performance. Built-in LED diagnostics provide real-time status monitoring, and standard 3/4-inch bottom connections allow for straightforward indoor installation without the need for venting.

Key Features

Brand	Optimal
Model Number	OPTI15
Product Type	Tankless Water Heater
Power Source	Electric
Use Location	Indoor
Installation Type	Wall Mount
Flow Rate	11.4 L/min
Voltage	240 V
Wattage	14500 W
Product Dimensions (L x W x H)	29.2 x 29.2 x 31.8 cm
Depth	8.9 cm
Weight	3.4 kg
Water Connection Size	3/4-in
Water Connection Location	Bottom
Display Type	Digital
Minimum Temperature	26.7 °C
Maximum Temperature	60 °C
Uniform Energy Factor	0.99
Safety Listing	ETL safety listing
Warranty	25-year limited

Highlights

Advanced ultrasonic flow technology for precise and efficient operation
Compact wall-mounted design reclaims valuable storage space
Reduces water heating energy costs by up to 50%
Built-in LED diagnostics for easy system monitoring and troubleshooting
Dry-fire protection prevents heating elements from burning out
Standard 3/4-inch bottom water connections with no venting required

Downloads

Frequently asked questions

Does this water heater require venting?

No, this electric tankless water heater does not require any venting for indoor installation.

What is the maximum flow rate of this unit?

This unit provides a maximum flow rate of 11.4 L/min (3 GPM).

What type of water connections does it use?

It features standard 3/4-inch water connections located at the bottom of the unit.

What safety protections are built into the heater?

The heater includes dry-fire protection, overheat shut-off, leak detection, and scale prevention.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

Orders typically ship within 5–7 business days. Returns are accepted within 30 days of delivery — see our Shipping Policy and Refund & Return Policy pages for full details.