Design Databases Heatlosses

Hi,

I am using design database for heatloss calculations for a student accommodation.  I am querying the results of the heatloss calculations as it returning results of between 30-40 w/m2, when we would expect to see a heatloss of around 60-70 w/m2.

Below is the data that I am using.

Wall Height 2.7m

Partition Height 2.4m

Ceiling Void 0.2 m

Window 1m2

Building set in Edinburgh with design temp of -5

I am still awaiting U-values from the architect but as a default I have been using the maximum u-values for building elements from section 6.

Wall 0.27 w/m2K

Floor 0.22 w/m2k

Roof 0.2 w/m2k

Windows,doors, windows and roof lights 2.0 w/m2k.

The floor area of a typical room is 15m2 and the building is 2 storeys high, with exposed floors and roofs set up.  Does 30-40 w/m2 appropriate using the values that I have used?  I can submit the model if required.

Thanks in advance,

Andrew