We can get high temperatures but are they needed?
1. We do not need the very high temperature necessary to kill Legionella Bacteria because we are not storing water in an environment that is suitable for its growth.

2. If we keep the temperature to 52C or below then we don't need a TPR valve because the water will never get hot enough to cause burns, under normal circumstances.

3. The rationale behind the high temperatures used in the past was to stop us from running out of hot water too quickly with the then grossly undersized standard hot water cylinders used in most homes.

4. Most appliances that need very hot water have their own very efficient heating systems built in.

Typical System Set Up
For a shower hot water supply we need less than 42C. The lower the temperature setting the higher the flow rate achieved and since we are only heating to the level required there is more power saved.

If we aim for 42C then introducing cold into the system becomes a problem because it's difficult to get only a "dribble" of cold water through the shower mixer and the inevitable result will be that comfort is difficult to achieve.

Check the water supply temperature by either measuring the temperature at the cold tap or ask the plumber, most already know roughly what it is in their area. Usually, for NZ, it is greater than 10C and could be up to around 18-20C.

Assuming a fairly low temperature of 10C, to achieve 48C at the hot tap requires a temperature rise of about 38C.

If we set a maximum flow rate of about 7 Litres per minute then we will be within the range that the heater can handle and then set the output temperature to about 48C, which is a good compromise. We can regulate the shower water temperature fairly easily and there is sufficient total flow to have a reasonable shower using a low flow shower.

If we wished, we could also add a grey water heat recovery unit into the shower drain system and this would raise the temperature of the incoming water so that an even greater flow could be achieved or less power would needed to heat the water.

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PARALLEL Models (Twin Module) COLD WATER feed only For higher flow rate hot water applications (i.e. Industrial Processes). Min. flow, 6 LPM.
Specifications
Orientation	Model	Options	Kw	Amps	Price	Applications
EX	144	P2	15.5Kw	64A (2*32A)	$1317.63	Industrial Processes High Flow Activation Cold Water Feed Only Laboratories
EX	190	P2	19Kw	80A (2*40A)	$1317.63

Options

NONE

PARALLEL Models (Twin Module) With Two Thermostats For PRE-HEATED WATER feed (dishwashers, photo processing, etc. Min. flow, 6 LPM.
Specifications
Orientation	Model	Options	Kw	Amps	Price	Applications
EX	144	T2	15.5Kw	64A (2*32A)	$1317.63	Commercial Dishwashers Photo Processing Booster (Solar) Commercial/Industrial Precise Temperature Setting+/– 0.27°C Adjustable, up to 82°C Anti Scald Protection
EX	190	T2	19Kw	80A (2*40A)	$1317.63

Options
EE	Emergency eye/face wash	ANSI Z358.1 tepid water
S	Sanitation	180 Degrees F - 80 Degrees C

SERIES TWO Models (Twin Module) With Single Thermostat. Turns on in stages based on hot water demand- (showers, etc.). Min. flow, 3 LPM.
Specifications
Orientation	Model	Options	Kw	Amps	Price	Applications
EX	144	T, TC	15.5Kw	64A (2*32A)	$1317.63	Residential Showers Industrial Processes Photo Processing Precise Temperature Setting+/– 0.27°C Adjustable, up to 82°C Anti Scald Protection Solar backup (TC) only
EX	190	T, TC	19Kw	80A (2*40A)	$1317.63

Options
T	Cold Water Feed
TC	Hot or Cold Water Feed
ML	Multi Lavs.	Turns on in stages. Powers up to 4 lavs at 40°- 43° C

Orientation
EX	Bottom Water Connections	1/2 (5/8 OD)Compression Fittings
Warranty
Provided that ALL warranty conditions have been met: Element Warranty. Heater Element Cartridges are guaranteed for a period of ONE YEAR from date of installation. Full Factory Warranty. Heaters are guaranteed against failure due to leaks of the heater body or element for a period of FIVE YEARS. Installation Warranty. Heaters are guaranteed against failure due to poor workmanship for a period of TEN YEARS.

• Please Call for Dealer Pricing
• Prices quoted include GST.
• Freight Paid (free) anywhere in New Zealand.
• Prices subject to change without notice.
• EEMAX products are generally available off the shelf, however some products may be temporarily out of stock. Lead time for out of stock products is normally about 4 weeks.