Performance, simplicity & reliability

Visit our online store to purchase a FORTIS™ tankless electric water heater.

Save Energy

FORTIS™ tankless electric eliminates stand-by heat loss. Save about 10% to 40 % of your water heating cost and more with vacation homes and businesses. 99% efficient, almost all of heat is absorbed by your water. Works only when you turn on your hot water.

Use Less Water

When installed near the baths & kitchens FORTIS© can save thousands of gallons of water and is compatible with recirculation.

Easiest Tankless Installation

All that is typically needed is a #2 AWG copper cable to power the tankless electric, 120 AMP at 240V. No vent needed, or gas line required. Built-in breakers makes installation easier, reduces time and cost. Homeowner simply needs a minimum 200 AMP electrical service at the house.

Hot Water, Endlessly©

Never run out of hot water again. Enjoy two showers at the same time, in most climates. Enough hot water for one to three bathrooms based on climate and season. Have enough hot water for visitors. By gallons per hour, FORTIS© can heat from 150 to over 250 gallons of fresh hot water in an hour.

Quality Inside

Siemens® quality components. Assembled in America using high-quality 304 & 316 grade stainless steel for superior performance & long lasting reliability. 16MHz Processor & a USB port for feature upgrades and usage logs, on tankless.com. Flush Valve for easy cleaning is just one reason a FORTIS© will outlast a tank water heater. All FORTIS™ come standard with a 10 year chamber & element warranty with 5 years parts.

Advanced Controller

Precise Digital Temperature Control with a range of 90°F to 140°F, adjusting to changes in demand while keeping you comfortable. Groundbreaking programmable options. Up to the minute data including flow rates, incoming water temperature, voltage, current and power usage. View hours of use, gallons & kW Hours, allowing you to track your usage. FORTIS™ is the only water heater in the world with a USB port, allowing you to easily upgrade your system. The only tankless system in the world that uses 5 data inputs in order to provide precise temperature control!

Downloads

FORTIS Installation Guide & Owners Manual (1.4MB)
FORTIS Brochure (432KB)
FORTIS Specifications (176KB)

FORTIS Firmware Software Update

FORTIS Firmware Software Update instructions (33KB)

NOTE:

• Before downloading, you must select the correct flow sensor below. Otherwise your Fortis will not function correctly! The versions are NOT interchangeable.

• The firmware can be upgraded from any previous version.

• Please check back periodically for updates.

To download the correct firmware version please click on the picture of the flow sensor installed on your FORTIS water heater.

NOTE: If you change the style of flow sensor connected to your FORTIS water heater you MUST upload the correct version of firmware to your FORTIS unit or it will NOT function properly.