ECOS 18 - Whole House

EcoSmart® Element™ Tankless Electric Water Heaters Provide Endless Hot Water at a Great Value. The durable, compact design is easy to use, install and maintain. In warmer climates, 18 kW and 27 kW units can provide endless hot water to an entire single-family home.


  • On-demand water heating eliminates standby loss for greater efficiency. 
  • Copper immersion heating elements fit into a single chamber with threaded brass connections for easy replacement.
  • Patented self-modulating software compares the actual outlet temperature to the set temperature and makes power adjustments to deliver efficient water heating.
  • SafeStart™ technology engages upon start-up and any power outage to help avoid dry-fire occurrence. 
  • Durable, lightweight engineered polymer shell does not rust or corrode. 
  • Stainless steel heat exchanger reduces corrosion for long life. 
  • Digital temperature control in 1-degree increments ranging from 60 °F -140 °F.

Specification ECOS 18
Power (kW) 18
Voltage 240
Total Unit Amperage (AMPS) 75
Required Number of Dedicated
Circuit Breakers
3 x 40 A DP*
Household Electrical Service
Panel Recommendations
150 AMPS
Phase 1
Uniform Energy Factor (UEF) 0.96
Required Wire (75°C Insulation) 8 AWG
Water Connections 3/4" NPT
Dimensions 19”H x 9.25”W x 4.25”D
Weight 9.3 lbs.
Heat Exchanger Stainless Steel
Operating Pressure Minimum: 30 PSI | Maximum: 150 PSI

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