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Indoor Air Quality

Indoor Air Quality

Problem caused by poor indoor air quality

The term Sick Building Syndrome (SBS) is used to describe cases in which building occupants experience general non-specific symptoms of malaise such as irritation of the eye, nose, and throat, lethargy and dizziness. These acute health and comfort problems appear to be experienced by the sufferers during the time they occupy or spend in a building and disappear soon after they leave the building. There are no specific illnesses or causes that can be identified. The complaints may be localized on a particular floor in a zone or may be widespread throughout the building. Additional symptoms of the syndrome include nose bleeding, dry cough, burning in trachea, dry or itchy skin, nausea, heart palpitations, shortness of breath and/or exhaustion after normal activities, muscle cramps and joint pains, tremors, swelling of the legs, trunk and ankles, difficulty in concentration, chronic fatigue, sensitivity to odors, pregnancy problems including miscarriages and cancer. A building is referred to as ‘sick’ if 20% of its occupants suffer from the symptoms of SBS and get relief soon after leaving the building. The effect of the syndrome is reduction in worker productivity and an increased absenteeism including employee sick leave applications. Caution should be taken that complaints may also result from other causes. These may include illnesses contracted elsewhere, acute sensitivity e.g. to allergies, job related stress, or dissatisfaction and other psychological factors. The phrase sick building; argues, is often used as a misnomer as buildings do not actually get sick but people do.

Heat-exchange Technology that Refreshes Room Air Temperature and Humidity

Try blowing into a rolled up piece of paper. The warmth of your breath travels through the paper to your hands. Some 38 years ago, this simple principle led to the development of our most effective air-conditioning technology. Mitsubishi Electric's Lossnay Energy Recovery Ventilators?Heat-exchange technology that refreshes room air without affecting temperature and humidity. On an extremely harsh weather day, if you decide to ventilate a cool, air-conditioned room with fresh outside air, the hot air entering the room will cause the temperature and humidity of the room to rise. If you adjust the air conditioner to a more powerful setting to maintain the temperature and humidity of the room, your electricity bills will rise. The Mitsubishi Lossnay* ventilation system lets you refresh the room air while maintaining the same level of cool, dry air that you desire. The system prevents energy loss during ventilation and helps to reduce electricity usage. Lossnay Core: Heat exchange using a specially treated paper filter - At the heart of the Lossnay Energy Recovery Ventilator is the Lossnay Core, a heat exchange filter developed exclusively by Mitsubishi Electric. As the exiting room air and the fresh outside air pass through the Lossnay Core, they are kept separate by partition plates made of a specially processed paper. It allows the transmission of temperature and humidity but prevents the passage of air. The idea for this technology was sparked when an engineer, watching his daughter at play, rolled a sheet of paper into a tube and then blew air through it. He noticed that the heat of his breath was transferred through the paper to his hand.

Lossnay Core

The features and benefits of the Mitsubishi Lossnay ERV include:

• Clean air supply, dirty air exhaust by two air paths (OA to SA and RA to EA).
• Energy recovery by LOSSNAY core
• Free cooling by bypass damper.
• Multi ventilation mode for multi ventilation request (Power supply, Power supply/exhaust, power exhaust).
• Over 50 percent enthalpy exchange efficiency.
• For fan speeds on 300, 470, 600 models: extra low, low, high, extra high.
• M-NET connectivity for use with CITY MULTI central controllers and BMS interfaces.
• Reduced sound pressure level: maximum sound level 40.5 Db (A).
• Three ventilation modes: auto, bypass, heat recovery.

Lossnay can be adapted to many different applications. As the global demand for energy-efficient commercial and home heating and cooling systems increases, it's no wonder that Lossnay Energy Recovery Ventilators are found in a wide range of facilities, including office buildings, department stores, and municipal buildings. Around the world, Mitsubishi Lossnay Energy Recovery Ventilators are earning accolades for energy efficiency. The system has twice won Japan's Ministry of Economy, Trade and Industry's Energy Conservation Award. In addition, Japan and seven other countries in Europe and North America have awarded patents to Lossnay technology.

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