As insulation standards improve, heat loss by ventilation becomes a larger proportion of the total heat loss from a building. Ventilation control is therefore necessary to minimize heating energy consumption in houses. States that while passive systems and those requiring occupant participation maygive satisfactory results, only a mechanical system can provide predictable ventilation routes and rates at all times. An extract only system has low initial cost, but it is difficult to ensure fresh air ventilation throughout the rooms of the house.

Reviews some of the cost effective techniques for energy conservation in new dwellings. Covers site layout and design, insulation of roofs, walls, doors and windows, ventilation control and control of condensation.

Air curtains are used to protect entrances of big buildings such as department stores and cold-storage warehouses. When designing an air curtain for a given situation, one needs to know the pressure difference between both sides of the curtain due to the temperature difference and forced ventilation, as well as the wind. In literature on air curtains the effect of wind is generally underestimated.

Demonstrates a simplified energy calculation procedure (suitable for a handheld calculator) developed for the evaluation of home retrofitting with respect to energy conservation. 

Studies indoor air pollution (and its effect on health) arising from gas cooking. 6-11 year olds from selected primary schools were studied annually from 1973-1977 to see if there was any association between gas cookers in the home and respiration illness.

Considers the options which could be described as heat recovery and which are open to building services designers and operators. Treats fundementals for heat recovery, inadvertent heat recovery, deliberate heat recovery, air recirculation, passive heat exchangers, active heat exchangers, heat pump systems, heat recovery systems, incremental systems, heat distribution in central plant heat recovery systems, controls, heat recovery in air conditioning systems, bivalent heating, the actual application process of heat recovery.

The use of sealants and gaskets are often recommended as an effective energy saving measure. However, the energy saved depends on the function of building and ventilation as a total system. This paper describes the effect of sealing the outer walls in residential buildings with natural and exhaust ventilation respectively. With natural ventilation, making the walls twice as tight reduces the air exchange by half, whereas with exhaust ventilation the reduction in air exchange is very small.

At present, there are many design and investigatory methods(often supported by computer programs)that take account of the reaction of the building and its heating and cooling systems to outdoor conditions as they vary with time. This makes it desirable to have some agreed sample of weather to allow contrast and comparison between various methods
for predicting building and system behaviour, and between individual design cases to be on a common basis.
The proposals below although evolved from work in the authors' establishments have been discussed more widely and

Sponsored by the Ministry of Trade and Industry, a consulting firm performed an investigation of the possible energy savings in industrial halls outside working hours. The ventilation should be closed during shut-down periods, and air change through natural draught cut down to a minimum. The ventilation by leakage of an industrial building may be estimated at 0.1-0.5 air changes per hour, therefore the tightness of the constructions is imperative. The decrease of the temperature in industrial halls during non-working hours is imperative.

Reviews important sources of indoor air pollutants, and discusses ways of measuring the contaminants emitted by the presence of man in a room. In a test chamber the carbon-dioxide and the odour intensity were measured as a function of room occupancy and ventilation rate. When the supply of fresh air was12-15m*3 per person per hour, the CO2 concentration was less then 0.15% and the odour intensity was evaluated only as a `slight annoyance'. Higher ventilation rates are necessary if increased physical activities and smoking is done in the rooms.