Ventilation research in occupied houses

Gives results of measurements of air-change rates and heat loss in occupied and unoccupied houses on two sites, one exposed and the other sheltered. Observations of the wind pressures on the houses and of the window-opening habit of the occupants are discussed. These are used in conjunction with the results of a regional survey of the temperatures maintained and the window-opening habits in local authority houses to extend the application of the results of other housing. Estimates that average rate of heat loss by ventilation will be from 6 to 8 therms per week corresponding to air-change rates of between 2 and 3 per hour.