Decentralized air conditioning via the building facade.
To air condition office and administrative buildings having facades with floor-to-ceiling glazing, Krantz supplies ventilation units for raised floor mounting; they provide the required minimum percentage of outdoor air and remove the internal cooling and heating loads. The unit type LG-ZUM-M-LB has an additional function with recirculated air.

 

Data

Supply air volume flow rate	33 l/s [120 m3/h]
Supply air temperature, summer	18 °C (with outdoor air 32 °C / 40% relative humidity)
Total cooling output: including	560 W
– for cooling down 33 l/s [120 m3/h] of outdoor air	240 W
– for cooling a room with tR = 26 °C	320 W
Chilled water temperature	15 / 17 °C
Supply air temperature, winter	34 °C (with outdoor air –12 °C)
Total heating Output: including	1 840 W
– for heating up 33 l/s [120 m3/h] tR = 22 °C of outdoor air	1 360 W
– for room heating with tR = 22 °C	480 W
Hot water temperature	50 / 40 °C
Control signal for fan speed	0 – 10 V DC
Effective power of fan	20 W (for volume flow rate = 33 l/s [120 m³/h])
Operating voltage	230 V / 50 Hz

Features 

• Outdoor air intake directly through the facade; return air extraction via central system
• Cooling and heating via air-to-water heat exchanger
• Cooling with outdoor air (free cooling)
• Mixing & displacement ventilation close to facade
• Energy-efficient EC radial-flow fan
• F7 class filtration of outdoor air