Air conditions of buildings and allowance for air penetration in calculation of the heating duty.

States that to calculate the ventilation characteristics of a building it is necessary to know the shape, planning and dimensions of the building, air leakage characteristics of all elements of the building, aerodynamic coefficients, wind velocity and internal and external air temperatures. Gives formulae for the calculation of the effect of ventilation characteristics on the heating load in three simple cases;multi-storey buildings with a) mechanical air supply and extraction b) mechanical extraction and natural ventilation c) as b) but with a preheated external air supply to the staircase.Two examples of the calculation are given. NOTES original not in library.