Fans | Vertical Unit Ventilators | Air Distribution Products | Fire Safety | Air Curtains and Heating Products | Tunnel Fans Changeair Series Intelligently Quiet vertical unit ventilators for classroom environments
| Changeair Series. Vertical Unit Ventilators Our data speaks volumes 2011 ASHRAE Applications Handbook, Chapter 48, Noise and Vibration Control cites ANSI/ASA Standard S12.60-2010 for classroom acoustics as a guideline for school mechanical design. ”Accurate acoustical analysis of HVAC systems depends in part on reliable equipment sound data. When reviewing manufacture’s sound data, obtain certification that the data have been obtained according to one or more of the relevant standards.
Changeair Series. Vertical Unit Ventilators Contents Teach with confidence Provides the perfect environment for learning. 4 Design with confidence Utilizes data gathered in an accredited reverberant laboratory. 10 Built & Tested with confidence Tuned and tested to perfection. 16 Maintain with confidence Quality, reliability and ease of maintenance, all in one package.
| Changeair Series. Vertical Unit Ventilators Teach with confidence Teachers, I believe, are the most responsible and important members of society because their professional efforts affect the fate of the earth.
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| Changeair Series. Vertical Unit Ventilators Challenges of classrooms Noisy classrooms = Disadvantaged students and educators A serious problem in our schools How many times would you ask someone to repeat themselves before giving up on hearing what was said? Most adults ask once, maybe twice, before embarrassment overtakes their desire to learn. A child in a classroom is unlikely to ask at all.
Changeair Series. Vertical Unit Ventilators Background noise HVAC equipment and ventilation flow generates background noise. This raises the level of noise in a classroom, which in turn requires the teacher’s voice to increase in order to be heard. a classroom. Much like dropping a pebble in a pond, at the source the sound amplitude (wave height) is higher, thus louder. As the wave travels it loses energy and its amplitude decreases. The increase is generally accepted to be about +15 dB.
| Changeair Series. Vertical Unit Ventilators Understanding tone The human ear calculates sound at different volumes throughout the spectrum of audible tones. At each octave in tone a certain dB level is required for that tone to be heard. As shown on the diagram, a lower pitched sound (<250 Hz) must have more dB’s for the human ear to hear it. This is the reason why subwoofers require amplifiers. Higher tones (>1000 Hz) do not need as much energy to be heard.
Changeair Series. Vertical Unit Ventilators A new standard for classroom acoustics These facts have not gone unnoticed by the American National Standards Institute (ANSI). As far back as the mid1990s, ANSI initiated a commission of audiologists, acoustic engineers, educators, architects, manufacturers, and others to begin developing a standard that would address excessive noise in classrooms. Today, that standard is known as ANSI/ ASA S12.
| Changeair Series. Vertical Unit Ventilators Design with confidence Speaking as a builder, if you start something, you must have a vision of the thing which arises from your instinct about preserving and enhancing what is there.
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| Changeair Series. Vertical Unit Ventilators Two different HVAC philosophies Forget what you think you know Zone control Cost Comfort IAQ Building use flexibility Centralized HVAC systems Centralized HVAC systems are often recommended as the quietest way to achieve comfort in classrooms. Comfort, of course, requires a delicate balance of temperature, humidity, and ventilation. Providing all of these in an entirely centralized HVAC design creates many challenges for mechanical designers.
Changeair Series. Vertical Unit Ventilators Time to retune your school HVAC selection System comparison There are many selection criteria used to determine the mechanical ventilation needs of a school application: Community use, Total cost of ownership, Classroom footprint, Energy efficiency, Ease of maintenance and Sound. Not all HVAC equipment is created equal to provide thermal comfort and indoor air quality the same way. These criteria are not all weighted the same.
| Changeair Series. Vertical Unit Ventilators LEED® Leadership in Energy and Environmental Design Today’s school buildings are designed to be sustainable, adaptable, and energy efficient. Changeair is committed to helping design and construction professionals achieve these goals. We offer solutions for indoor air quality and unsurpassed project support. We can assist you with designing your project, ensuring that the indoor environmental quality complements your unique vision.
Changeair Series. Vertical Unit Ventilators | 15 LEED for schools: New construction and renovations The LEED for Schools rating system recognizes the unique nature of the design and construction of K-12 schools. It addresses issues such as classroom acoustics, master planning, mold prevention and environmental site assessment.
| Changeair Series. Vertical Unit Ventilators Built and Tested with confi Manufacturing is more than just putting parts together.
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| Changeair Series. Vertical Unit Ventilators Sound and airflow test laboratory Our dedication to education Sound data you can trust The Systemair laboratory is designed and equipped to perform testing in accordance with AMCA Standard 300, Reverberant room method for sound and AMCA Standard 210 for airflow performance. Since the lab first earned AMCA accreditation, Systemair has worked to continually increase the lab’s capabilities.
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| Changeair Series. Vertical Unit Ventilators Top features of cabinet design These change everything Electronically Commutated motors (ECM) Not only do they offer a greater efficiency range with minimumal noise, they are also mounted in a dual fan assembly which is double isolated from the unit's structure. Enhanced coil Our aluminum wave fin coils were specifically engineered to enhance sound performance while maximizing efficiency.
Changeair Series. Vertical Unit Ventilators Airtight cabinet Our unique manufacturing process ensures an airtight cabinet seal free of unwanted and unnecessary sounds. Non-toxic acoustic insulation The cabinet panels are thermally and acoustically insulated with 1”(2.54 cm) thick flexible acoustic insulation.
| Changeair Series. Vertical Unit Ventilators Vertical Non-Compressorized Unit Ventilator You expect precise thermal control, great quality and value. Vertical noncompressorized unit ventilator surprises with superior sound performance options with the Intelligently Quiet design. It offers the most versatile unit ventilator solution for quiet, comfortable and healthy indoor environment.
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Changeair Series. Vertical Unit Ventilators 70 65 60 60 55 50 45 40 40 NC Lw (Room) dB 50 35 30 30 25 20 20 15 10 63 125 250 500 1000 2000 4000 8000 Hz Lwradiated @ 0.00“ ESP Lwradiated @ 0.25“ ESP Diagram: Sound data for 1,000 cfm airflow Measurement point: 450 cfm of fresh air ESP Lwradiated Lwdischarge Sound Power Sound Pressure 63 Hz 125 Hz 250 Hz 500 Hz 1,000 Hz 2,000 Hz 4,000 Hz 8,000 Hz LwA dBA NC 0.00” 55.9 52.6 37.6 30.1 22.4 17.8 23.8 20.4 38.
*B-cabinet shown 26 | Changeair Series Series.
Changeair Series. Vertical Unit Ventilators Air Source Heat Pump / Packaged AC When cooling is your priority Changeair offers two air to air options. The Air Source Heat Pump can be configured as an air source heat pump or, simply, as a self contained a/c unit with integral evaporator and condenser. Two stage compressors and easily accessible components allow the Sophomore to deliver efficient cooling year after year. With many available options the Sophomore meets and exceeds all specifications.
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Changeair Series. Vertical Unit Ventilators 70 60 65 60 50 55 45 40 40 NC Lw (Room) dB 50 35 30 30 25 20 20 15 10 63 125 250 500 1000 2000 4000 8000 Hz Lwradiated @ 0.00“ ESP Lwradiated @ 0.25“ ESP Diagram: Sound data for 1,000 cfm airflow Measurement point: 450 cfm of fresh air 3 ton unit; compressor on stage 2 ESP Lwradiated Lwdischarge Sound Power Sound Pressure 63 Hz 125 Hz 250 Hz 500 Hz 1,000 Hz 2,000 Hz 4,000 Hz 8,000 Hz LwA dBA NC 0.00” 66.9 62.6 52.
| Changeair Vertical unit Series. ventilators Vertical Unit Ventilators Maintain with confidence The test of the machine is the satisfaction it gives you. There isn’t any other test. Robert M.
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| Changeair Series. Vertical Unit Ventilators Changeair Series Engineered for ease Simplicity Freshman units require very little attention to stay running quietly and effectively. Our designers continuously improve the access, reliability and simplicity of our Classroom Air Handlers. Controllability The power of a Changeair unit’s modulation capability is best experienced with Factory supplied controls.
Changeair Series. Vertical Unit Ventilators | 33 Visit systemair.
| Changeair Series. Vertical Unit Ventilators 11 12 10 13 9 8 16 3 2 15 7 6 20 19 14 25 FACILITIES IN 20 AROUND THE WORL 1 In the summer of 2012 Changeair was added to the Systemair group of companies. More than 5,000 employees work for more than 60 subsidiaries located in 45 countries making Systemair a leading ventilation company worldwide. In 1974 in Skinnskatteberg, Sweden the Systemair success story began with the invention of the inline duct fan.
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