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[EnergyPlus_Support] Re: Temperature problems!

Actually that is not so unrealistic for a perfectly sealed (no infiltration) large windowed, well insulated space with no HVAC.

The reason this seems excesive is because we all know and love "normal" houses...these are usually incontact with the ground (steady 18 deg C) and have inflitration rates probably exceeding 2 ACH (0.7 at 50 Pa blower door test would be a good result for your average historical building). Also, the newer builds have insulation properties far higher than we are used to and the window to wall ratios are becomming higher and higher because people don't seem to get that 1 inch of two pane glass just can't compete with 200 mm of concrete in terms of u-values (0.35 for concretes) and SHGC or g-values (probably in the range of 0.1 for concrete...no direct IR radiative transmission).

1) Check the insulation values
2) Check the infiltration values
3) Check the ground adjacency boundry
4) Check the window size and gains through windows (and doors).





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