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    		You are here: Home /Products /Instant Electric Water Heaters - EEMAX /EEMAX System Size Calculator

    Hot Water Usage Calculator

    On-Demand Heating Considerations At A Glance
    • Water crystalises at about 4°C so don't use an on-demand appliance if the incoming cold water temperature is likely to fall below 5°C
    • For safety, do not set a temperature rise such the the outlet temperature can exceed the legal specification for showers - 45°C
    • If using in conjunction with a solar hot water system, a TP valve on the inlet side is mandatory.
    • It is best to measure the actual flow rates at each hot water outlet connected to a system.
    Before placing an order please pay attention to the following:
    1. Ensure that the appliance you are ordering is compatible with your supply voltage.
    2. Before ordering, ensure that your power supply is able to handle the load expected.
    3. If you are in doubt about anything, consult your electrician and or plumber.
    Groundwater temperature in °C for various NZ locations.
    This will not necessarily be accurate for you but gives some idea of the temperature to expect. Deduct 1/2 to 1 degree from the location nearest you and use it as your base temperature.
    Alternatively you may be able to get more accurate local information from your water services provider.
    Calculate your rise in temperature.
    1. Select a weather station near you from the panel above and deduct between 1/2 and 1 degree to estimate your base temperature.
    2. Enter the base temperature and the temperature you expect from the system
    3. Press Calculate
    Base Temperature [°C] Expected Temperature [°C]
    Your result will appear here.
    Flow Rate Chart
    Rates shown below are indicative only. For best results measure your own system.
    Outlet Dunny Basin Shower Unit Bath or Shub Vanity Basin Wash Tubs Kitchen Sink Dish Washer Washing Machine
    LPM/outlet 2 - 4 6 - 16 6 - 16 2 - 4 2 - 6 2 - 6 2 - 6 2 - 6
    EEMAX System Size Calculator
    Choose a system based on the number of outlets you expect to be operating at once
    For a whole of house system this is often one or two showers and a washer or sink.
    Desired Flow Rate [LPM]
    		 Temperature Rise [°C]
    Your result will appear here.
    EEMAX Flow Rate Calculator
    Use this calculator to check that the system you are looking at will work for you.
    Power Rating [Kw] Temperature Rise [°C]
    Your result will appear here.
    This calculator is copyright © 2004 - 2008 Quadrix Energy Ltd.

    Legal Notice

    • EEMAX systems are 99% efficient and have a power factor of 1. This information applies ONLY to EEMAX systems. It is not intended for use with any other system.
    • While we strive for accuracy in the calculations presented we will not be held responsible for any inaccuracies or omissions.
    • If you wish to use this calculator on your web site please contact us first.

    Copyright © 2004 - 2008 Quadrix Energy Ltd