• Description
  • Specification
  • Sizing & Installation
  • Replacement Parts

POU 3.5 | Point of Use 3.5kW Water Heater

This model is ideal for hand washing applications, and great in places like bathrooms, wet bars, strip malls, doctor’s offices, boats, recreational vehicles (RV).


The POU 3.5 is a true point-of-use model. It has a slightly less heating capacity than the POU 6. It has a maximum flow rate of 0.5 gallons per minute (gpm) and includes a 0.5 gpm sink aerator. In mid-level climates, this unit can heat half a sink, but in warm climates, it can heat a sink and a half. Use the EcoSmart interactive sizing guide to find out which model is ideal for you.

POU 3.5 Features:

  • On-demand, consistent and endless hot water
  • Digital display that shows output temperature
  • Copper and stainless steel components designed for efficiency, durability and easy replacement
  • Compact size


Voltage 120
Phase Single
KW 3.5 kW
Elements 1 x 3.5 KW @ 120
Amperage Draw 29
Required Breaker 30
Required Wire 10 AWG
Electrical Panel 100 Amps
HZ 50/60
Connection Fitting 1/2" NPT
Dimensions (in.) 7" x 11" x 3"
Weight 4 lbs.
Exchanger Stainless Steel
Protection Thermal Auto
Activation Flow .25 GPM
Energy efficiency: 99.8%
Certification: ETL Listed to UL 499 & CSA
Warranty 1 Year


Installation of your EcoSmart tankless water heater requires certain wiring and electrical specifications. To ensure maximum performance and to maintain your warranty, it is recommended that you have a licensed professional install the unit. If you have any questions regarding product sizing, contact customer support at 877-474-6473.

Click here to download the installation manual




CB QC POU - $38.65

Control Board

Compatible with:

POU 3.5 & POU 6


ENC FPOU - $22.22

Front Enclosure

Compatible with:

POU 3.5 & POU 6


FSA NFPOU - $13.25

Flow Sensor Assembly

Compatible with:

POU 3.5 & POU 6

HE 35120

HE 35120 - $33.78

Heating Element 3.5 KW @ 120V

Compatible with:

POU 3.5

PSC 10

PSC 10 - $23.94

Power Supply Cord #10

Compatible with:

POU 3.5 & POU 6


TRC QC POU - $13.25

Triac for POU

Compatible with:

POU 3.5 & POU 6

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