SFP

systemair

Fans | Air Handling Units | Air Distribution Products | Fire Safety | Air Curtains and Heating Products | Tunnel Fans

The straight way to energy efficiencyis all in the details

Facts in brief

AAAHighest available credit rating during last 16 years

80More than 80 engineers from 13 development teams

48Delivery within 48 hrsfor selected products

19Production facilities in Europe, North America and Asia

100Exports to 100 countries on a regular basis

55companies in the Group worldwide

2of our facilities earned ISO 14001 environmental certification

SYSRListed on the NASDAQ OMX Nordic Exchange

5We have five development centers at our disposal

1MilMillion orders annually

700Million USD Sales in fiscal year 2012/2013

10of our productionfacilities have ISO 9001certification

Systemair is a leading ventilation company with operations on four continents. Systemair manufactures high-quality standardized ventilation products. Our main focus is to develop products which are simple, robust and that supply, extract, convey, heat, cool and distribute air energy-efficiently in a building. Our products are robust and easy to select, install and use.

Simple, effective and reliable

Say the words “energy efficiency” and it sounds like a magical incantation. But just take a moment and think what they mean to you?

The impact of efficiency now manifestsin every single aspect of your life, from the smallest decisions like a lamp for your dwelling to the biggest decisions like engineering systems in the largest construction projects. Today‘s energy efficiency is being embraced by all. There is no illusion about it. This magic is being created through todays’ technologies which are combined with a strong emphasis on functionality and performance.

They are many advantages, and will soon be clear. Please, read on.

Total cost for the ventilator’s dutycycleThe energy consumption of a ventilation system usually represents the majority of a ventilator’s duty cycle’s cost,better energy efficient ventilators will have a significantimpact towards preserving not only the environment but alsoimproving your bottom line.

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Cost

Efficient working point Unusually high operating costs of ventilation systems areoften caused by inefficient fan operation that, in turn, can bethe result of improper fan selection, poor system design, orwasteful airflow control practices. Improper fan selection oftenmeans the fan is oversized for the application, resulting in highairflow noise and affecting space and maintenance issues. Poorsystem design can lead to high operating and maintenancecosts by promoting poor airflow conditions. An effective way ofminimizing maintenance and operating costs is to keep a fanoperating at its optimal efficiency point.

The cost-effective operation and maintenance of a ventilationsystem requires attention not only to the needs of the individualcomponents, but also to the total system performance.

At Systemair, we are aware of our responsibilities.Our contribution to modern environmental protectionis efficient use of energy. The ‘GreenVentilation’ symbol identifies intelligenttechnology in harmony with the environment.

It shows that our products are suitable for thefuture. In this way we offer our customersa means of combining sustainability with

economy, and reaping the benefit fromstraightforward, well-planned installations.

The key to your savings

SFP

Energy efficiency is the key to your savings Energy efficient ventilation is about designing the system ina smart way, using high efficient ventilators and adjusting theventilation rate to actual needs, rather than always operating atfull capacity.

To ensure that power consumption in a building isas efficient as possible, a special concept known as

the Specific Fan Power (SFP) is used. It indicates the demand on power efficiency of supply air

and exhaust air ventilators in a building.

The SFP should be determined during the earlydesign stage of the building concept. It will helpto choose the proper equipment to satisfy therequired energy consumption.

SFP

3.0W/l/s is the

recommended SFP whenmaintaining ventilation

systems 2.0W/l/s is required SFPtarget value for newventilation systems

and installtaions

The use of the SFP approach in the fanselection process will result in a quieter,more efficient, and more reliable system.

Principle to select an appropriate equipment The SFP principle in fan selection is to choose a fan to deliverone flow at one pressure in a particular system using as lesselectrical energy as possible and all other factors being equal.Figure 1 illustrates the operating points of both high and lowresistance systems, which might be chosen by either keeping asystem efficient at the SFP equal 1.51 W/l/s or non-efficient atthe SFP equal 4.36 W/l/s. It is best to select a fan that will givean operating point in the higher range. The low static pressureend of the performance curve is to maintain the fan rationallyand to avoid it from stalling.

Figure 1. Fan/system interaction

SFPE = qf

Ptf + Pff (W/l/s)

What is the Specific Fan Power?SFP is a measurement of the electric power that is needed todrive a fan, relative to the air volume that is circulated throughthe fan. This value is not constant for a given fan, but changeswith both airflow rate and fan pressure rise.

For a given operating point the SFP value can be defined as:

wherePtf - total power for supply air fans, W Pff - total power for exhaust air fans, W qf - dimensioned air flow, l/s

The lower the value, the more efficient the system is attransferring the air.

Each particular system should be analyzed for possible reduction in the overall resistance to airflow. Other considerations, such as available space and power, noise, reliability, and operating environment should also be brought to bear on fan choice.

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Free delivery

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Low resistance systemHigh resistance system

We offer you the best productsthat maintain a lo w SFP value

Demand controlWith demand controlled ventilation, the airflow is adjusted to the actual demand. Therefore, only the energy needed to create the right level of comfort is used. The fan automatically slows down reducing the airflow when there is less demand. Demand controlled ventilation gives a more energy effective solution with lower running costs, reduced wear and less negative environmental effects. It also provides lower noise levels and longer service life. In other words, you get much better comfort for less money!

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Our product`s unique compact design makes it possible to solve all space-saving issues for even the most varying ventilation challenges.

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DVC

Air handlers

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Commercial supply and exhaust fans

Integral electronic controls ensure that the motoralways operates at its optimal working point.

Energy studies Recent studies show that the electrical energy consumptioncan be reduced rather easily from the “traditional“ level(between 5 and 10 W/l/s) to a better level (1,5 to 3,0 W/l/s)with proper design and installation.

Efficiency as an advantageEach fan’s efficiency remains constant along the same systemline. Fans with a high static pressure value frequently have agreater efficiency value than fans at a low pressure. But thesehigher levels of efficiency are only achievable within a limitedarea where the system line represents a weaker air flow witha high resistance. The blue curve in Figure 2 illustrates such acase, whereas the green line gives less resistance.

Meanwhile, the fan results in higher efficiency values at a given pressure in low resistance systems. Therefore a fan with the lower SFP factor would have to be selected.

Figure 2. Efficiency at various working points

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Contact your local representative for energy-efficient ventilation solutions for your next project.To find a local Rep in your area, please follow on our web-site.

www.systemair.net

Simple, effective and reliable