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RZ eta-engl Kopie - HOWATHERM

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2<br />

Systems<br />

information<br />

orientation<br />

messages<br />

insights<br />

Systems<br />

create helpful<br />

standards, saving us<br />

time to develop individual<br />

solutions.<br />

Energy-<br />

optimized<br />

<strong>HOWATHERM</strong> Klimatechnik has been specializing<br />

for nearly 30 years in the development<br />

and production of efficient<br />

systems for air handling applications to<br />

create and maintain comfortable indoor<br />

atmospheres for people.<br />

In the evaluation of contracts, operating<br />

costs have long been a key parameter. An<br />

environmentally responsible and economical<br />

use of resources, in both the manufacture<br />

and the use of AHU equipment, are<br />

important decision-making factors to specifiers<br />

and equipment users. Electrical<br />

power savings are a particularly important<br />

criterion.<br />

This is why <strong>HOWATHERM</strong>'s engineers, in<br />

their ongoing design improvement, have<br />

made the reduction of electrical power<br />

consumption an overriding objective.<br />

Investment and operating cost<br />

estimates<br />

An evaluation of our ETA SYSTEM versus<br />

conventional designs may appear to show<br />

initially higher investment costs.<br />

If the equipment side is included in these<br />

calculations - and about 60% of all systems<br />

require converter control - the frequency<br />

converter cannot generally be taken into<br />

account in the pre-investment analysis.<br />

Without the frequency converter, however,<br />

the investment cost of an ETA SYSTEM<br />

looks even more favorable when compared<br />

against conventional equipment, given<br />

the reduced mechanical complexity. And<br />

even if the frequency converter is included<br />

in the analysis, the ETA SYSTEM offers payback<br />

periods of 1 - 2 years on average.<br />

With the fundamental option of an ondemand<br />

flow control system, this payback<br />

period will be cut by another 50%.<br />

Evidently, the elimination of the belt drive<br />

can often make a second filter stage dispensable.<br />

Let us assume that you intend to replace a<br />

conventional AHU with one from our<br />

energy-optimized ETA SYSTEM range, all<br />

other design characteristics being equal.

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