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[EnergyPlus_Support] thermostatic control

I am simulating a 3 stores building with very low insulation level and 
an heating system with boiler and aluminum radiator (BASEBOARD 
HEATER:Water:convective). I set a single heating setpoint thermostatic 
zone control for the three conditioned zones (one each floor) and 
nothing for other uncontrolled zones (stairs, technical zones). Heating 
setpoint is 0°C (system switched off) during the night and 20 °C during 
the day. The real building I am simulating is also monitored by a data 
acquisition system collecting indoor and weather parameters. The 
question regards the indoor air temperature: the up (from 0 to 20 °C) 
and down (from 20 to 0 °C) slope in the simulation are sharper than in 
the real working conditions and the temperature pattern during the day 
is perfectly on the setpoint temperature in the simulation and only 
around the setpoint in the real working conditions (with waver of a 
couple of degree: from 19 to 21 °C). Is there a way to define a more 
real thermostat in EnergyPlus (the one so far simulated is too 
theoretical, too perfect!).

Thank you very much for any suggestion.

Roberto

PS I have just uploaded the idf file I am using

___________________________________________________________________________________
ITC-CNR 
Istituto per le Tecnologie della Costruzione del Consiglio Nazionale delle Ricerche
Construction Technologies Institute of the National Research Council
www.itc.cnr.it
via Lombardia, 49
20098 San Giuliano Milanese (MI), Italy
tel +39 02 9806 215
fax +39 02 9828 0088
e.mail r.lollini@xxxxxxxxxx




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