[Equest-users] Calibration with Real Weather Data Extreme Year

[John Aulbach]

Niko:
 
If you have actual weather to use for calibration and you are over predicting heating energy, then I would look at the model itself...
 
1) Are you turning off the system at night, or at least setting it back? Nighttime is when most heating occurs.
 
2) Are you setting the thermostat profiles to correct temperatures. Is the heating T-Stat actually 68°F vs. 72°F?
 
3) Are you modeling the correct HVAC system?
 
4) Are your wall, window, and roof U-Values correct?
 
5) Are you infiltrating too much air, especially at night?
 
6) How does your electric usage (I am assuming your heating is gas) match up with utility bills?
 
7) Is there large thermal loads like kitchen cooking, laundry hot water, or other thermal usage that should be increased in the simulation?

Just a few things you may wish to check?
 
John Aulbach, PE
Los Angeles, CA


      
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