Modern Office Strandards Poland 2020

Modern Office Standards Poland 2020 / Rolfe Judd / CBRE /

Recommendation: Heating Cooling & Ventilation (*8)

B) INTERNAL HEAT GAINS — SMALL POWER

• Office equipment (diversified load): 30 W/ sq m based on 7 sq m/ person occupancy ratio and 80% utilization factor • Risers / bus bars on floor distribution boards: 2% of installed power • Heat gains from low voltage systems (security, fire detection, etc.) are so small that they are usually omitted

Internal design temperatures according to PN-EN 15251:2012 and PN-EN 7730:2006:

Winter 20,0–24,0°C (*8), recommended 21,0°C

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Summer 23,0–26,0°C (*8), recommended 24,0°C

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With air velocity not higher than the mandatory one

/ CBRE / Rolfe Judd / Modern Office Standards Poland 2020

Heating, cooling and ventilation / B19

C) INTERNAL HEAT GAINS — IT SERVICES

Winter max 0,15 m/s

• •

Summer max 0,18 m/s

Central server room: 30 kW

• •

Local distribution points: 10 kW

Mechanical Ventilation Rates •

Minimum fresh air is legally required at 30 cubic m per hour per person, however it is recom- mended to provide 40–50 cubic m per hour per person (*7). Higher exchange creates better internal environment. It should be noted that best practice is typically set over a minimum level of 36m 3 per hour per person recommended during BREEAM certification. Recommended value of CO2 concentration [ppm] above the concentration in the outside air for A class buildings is at the level of 350ppm (maximum 500ppm) (*8) • Assume higher Ventilation Rates than provided in the regulations • Fresh air supply provided also in the spaces dedicated for coffee points and kitchens • Higher air supply for the conference rooms (individual control panels)

D) INTERNAL HEAT GAINS — LIGHTING

5–10 W/ sq m

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B19 / Heating, cooling and ventilation

E) INTERNAL HEAT GAINS — OCCUPANTS

150 W/ person

•

Humidity Control •

40–60% in summer and winter

Free cooling system

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• Dedicated HVAC for medic and fitness sector — and some spar air to distribute

Thermal environment meets the requirements of category A in the building, if the temperature is met in at least 95% of the rooms used class A requirements by more than 97% time of use during the year; speed air and noise in at least 95% rooms used do not exceed the limit values.

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