Dux Non Condensing Unit 21L

Dux Non Condensing Unit 21L


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Dux Non Condensing Unit 21L

The Dux non condensing 21L unit is compact and efficient.  Dux’s latest range of Continuous Flow units are an excellent option for New Zealand homes. Dux gas continuous flow water heaters heat the water only as needed, not wasting energy by keeping water in a tank hot, earning it a 6 star (or higher) energy rating. With several flow capacity models available, ensure you select a Dux continuous flow water heater that best suits to the number of outlets in the home.

  • 6 star or higher energy rating
  • Never run out of hot water
  • Space saving design
  • Providing homes with superior technology straight from Noritz, Japan’s leading manufacturer of household water heaters
  • Electronic ignition means no standby pilot light
  • Suitable for 3 outlets
  • Also available in 17L and 26L/min model
  • 12 year warranty on heat exchanger, including 3 year full parts and labour*

Gas Type

Available for Natural Gas or LPG, specify gas type at time of purchase.



Install Guide

Accessories Technical Specification


Gas Type


Shipping times vary for different products please see the list below for estimated shipping timeframes.

Product Shipping Times
Accessories 2-3 days
Basins 5-7 days
Baths 3-5 days
Showers 5-7 days
Toilet 5-7 days
Vanities (excluding Brighton range) Vanities are custom made and have a lead time of 2 weeks. A delivery date will be emailed on receipt of your order.
Vanities (Brighton range) 5-7 days
Heat Pumps 5-7 days
Gas Fires 3-5 days
Installation Accessories 2-3 days
Laundry 3-5 days
Pumps 3-5 days
Tapware 3-6 days
Water Filters 3-5 days
Water Heating Products 3-5 days

View our returns policy