VR 400/700 DCV/DC Good
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VR 400/700 DCV/DC Good ventilation For dwellings, smaller offices and business premises www.systemair.com

2 Our indoor air Recent years research shows that we are less productive when we breathe poor quality indoor air. In general we spend up to 70% of our time indoors and in colder climates such as some parts of Northern Europe this can be as much as 90%. It goes without saying that the approximately 15 000 litres of indoor air that we breathe in daily should be fresh and oxygen rich but is this the case today? Yes, our offices as a rule have good ventilation, but it is in our homes where we often have problems. If we want good indoor air, we must have good ventilation, there are no short...

3 of the building, and also limit the installed electric power in single houses with direct electrical heating as the main source of heating. The new regulations on energy management put great requirements on the design and workmanship. Ventilation, insulation and so on must be adapted to the lower energy use. A ventilation system that does not meet these demands or is poorly designed will not be helped by modern construction methods and could indeed contribute to poor air quality in the home. Well insulated houses can suffer with mould growth within the fabric of the building if there is...

Solutions Home The VR 400/700 DC can be installed on a wall or in loft spaces. The picture shows a typical installation in a laundry room, but the location could just as well have been in the garage or in the basement. In the kitchen a separate kitchen extract fan with its own duct to roof cowl is installed. Small premises In smaller premises up to approx. 100 m2, such as offices and shops, the VR 400/700 DC are suitable for installation in loft space if available or on a wall. Control functions The new control system has a very user-friendly interface that makes it easy to commission and...

5 VR 400/700 DCV and DC are complete air handling units suitable for homes, smaller offices and similar premises. With EC-fan motors and a new regulation system the energy use is optimized to be able to meet the new regulations on energy management. Compared to AC-motors EC-motors maintain efficiency throughout the motor speed range when speed controlled and are therefore suitable to use in demand controlled ventilation units. Measurements show that an EC-motor reduces the energy use with up to 50% compared to a traditional voltage controlled AC-motor. To ensure optimal operation, the...

6 Technical data Energy saving functions Rotary heat exchanger with up to 80% heat recovery. No need for defrosting, which means continuous recovery of heat from the warm extract air. Separate adjustment of supply and extract air means less need of regulating dampers and thus avoiding increases in system pressure. Built-in week timer adapts the units operation to the buildings activities. For example, an office: Monday-Friday 08.00-17.00 Normal ventilation Remaining time Min. ventilation (incl. Saturday and Sunday) The cool recovery function is used in the summer in combination with an...

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