18 kW
ES18-D
For apartments, larger residential loads, and service applications when properly sized. Wi-Fi enabled for remote temperature monitoring and control.
View ES18-DDrakken application family
High-Flow & Light Commercial
Higher-output electric tankless systems for larger residences, multiple fixtures, busy service areas, and professionally engineered light-commercial demand.
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Models in this family
Compare the right starting points.
Larger residences, multi-bath applications, restaurant prep and service kitchens, utility areas, and specialty projects.
27 kW
ES27-D
For larger homes, multiple fixtures, and light-commercial applications when properly engineered. Wi-Fi enabled for remote temperature monitoring and control.
View ES27-D36 kW
ES36-D
A separate 36 kW platform for demanding residential and light-commercial installations. Wi-Fi enabled for remote temperature monitoring and control.
View ES36-DApplication ideas
Built around real hot-water demand.
Each image below represents the application named—select the product only after confirming flow, temperature rise, energy source and installation requirements.
Large Residences
Busy Commercial Kitchens
Multi-Bath Homes
Commercial Utility
La diferencia Drakken
Separate the water from the heating elements.
Drakken’s patent-pending water-isolated heat-transfer design separates the water path from the heating elements. Multiple controlled power stages respond to demand while the engineered exchanger supports consistent heat transfer in properly sized high-flow applications.
By isolating the heating elements from direct water contact, the design is intended to avoid dry-fire exposure, reduce mineral contact at the elements, eliminate routine screw-plug heating-element replacement, and deliver more consistent hot water when the system is correctly sized and installed.
Water-isolated heatingReduced calcium exposureNo screw-plug element changesControlled, consistent output
Confidence backed by replacement coverage. Qualifying registered products include a 5-year replacement warranty. After year five, coverage may be eligible for paid reactivation, subject to Drakken approval and the current written warranty terms. Patent pending.
Electric temperature-rise planning
See how flow changes achievable temperature rise.
The curves below include electric models only and use the standard theoretical heat-balance calculation from rated electrical input. Actual performance changes with efficiency, voltage, inlet temperature, water pressure, and installation. Use the values as a planning reference until manufacturer-tested curves are approved.
| Model | 0.5 GPM | 1 GPM | 1.4 GPM | 2 GPM | 2.5 GPM | 3 GPM | 4 GPM |
|---|---|---|---|---|---|---|---|
| ES18-D | 246°F ΔT | 123°F ΔT | 88°F ΔT | 61°F ΔT | 49°F ΔT | 41°F ΔT | 31°F ΔT |
| ES27-D | 368°F ΔT | 184°F ΔT | 132°F ΔT | 92°F ΔT | 74°F ΔT | 61°F ΔT | 46°F ΔT |
| ES36-D | 491°F ΔT | 246°F ΔT | 175°F ΔT | 123°F ΔT | 98°F ΔT | 82°F ΔT | 61°F ΔT |
Planning reference only—not certified performance data or final sizing approval. A qualified professional must verify the current submittal, manual, rating label, electrical capacity, and site conditions.