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In a marine temperate climate historic buildings that are equipped with thermostat-controlledheating systems show very low relative humidities (RH) during the heating season. This maylead to mechanical damage due to drying of hygroscopic materials like e.g. wood. Humidistatcontrolled systems are investigated using two different cases. Two top monuments of theNetherlands serve for the case study: Hunting Lodge St. Hubertus and Muiden Castle.The effectiveness of a humidistat-controlled heating system is investigated, both by simulation and by experiment.

DCV is one of the main issues in the near future due to the large potential of energy savings,the importance of maintaining a good IAQ with an adequate ventilation rate and the optimisation of system sizing. Nevertheless the technology or sensor used must adequately follow the actual demand. The study shows on site results on two different technologies.The first site is a collective dwelling installed with natural ventilation system situated in Nangis, near Paris (France) which has been renovated with hybrid ventilation and humidity controlled outlets and inlets.

Ventilation systems with variable airflow rates (VAV) can be used to decrease the amount ofenergy used to heat and cool the supply air and move the supply and exhaust air. Additionally,the occupancy detection system can work together with the heating and cooling system anddecrease other energy uses by changing the indoor climate demands when building is not occupied. However, a VAV system has higher installation and maintenance costs than a system with constant airflow rate (CAV).

This paper describes an ongoing demonstration project on the use of personalized ventilationin practice. Several designs of air supply devices for PV were developed, tested and optimisedbased on the efficiency of clean air supply to occupants breathing zone, control functionality,aesthetic, etc. Pilot installation of the PV system in a number of offices was used to gather better experience on the interaction between occupants and the PV system.

The air distribution is a realizing form of indoor flow field, which plays a vital role to indoor air quality in the design of Heating,Ventilation and Air Conditioning. The average temperature and air speed in working area are closely related to air distribution, and the main factors that affect such two indices are the form, position, quantity of air outlet as well as the velocity, temperature of air supply. This article discusses the effect of air distribution on indoor air quality.

Analysis of operation of a prototype system for local air-conditioning of working places, named PERMICS-LOS1 (Personal Microclimate System) was made based on measurements of air velocity field, using a hot-wire anemometer and of tracer gas concentrations with decay method. The emphasis of the experimental analysis was on design and effectiveness of the air terminal device in terms of air distribution using also visualization technique.

In a modern office environment, balance is sought between working as individuals and the interaction between employees. It must be possible to appropriately combine various work methods, which means that partition walls and workstations should be flexibly adaptable, in order to best match the business model of each customer. The adaptability of office space is one of the central premises in designing a beam system. The systems must adapt to changed loads and partition wall locations.

Ventilation is an effective method of introducing air into and moving air through buildings to achieve indoor air quality that is comparable to outdoor air quality. However, questions have recently been raised about the effect of ventilation on indoor air quality in hospitality venues where smoking is allowed. Dilution and removal of particles and gasses from various sources within a building and controlling temperature and humidity are the primary reasons for ventilation. Some of the first mechanical ventilation systems were designed to control particles and gasses from tobacco smoke [1].

Regular air tightness and infiltration measurements were performed in forty houses, in the area of Attica, Greece. Two measurement methods were used, the tracer gas decay method and the Blower Door tests method. Blower Door measurements were done in accordance with EN ISO 13829 [1]. Ambient conditions and temperature fluctuations inside the houses were measured as well.

This study discusses the empirical validation of a multi-zone infiltration model of an existing two-storey detached house in the cold Finnish climate. Empirical validation was performed by comparing simulated and measured pressure conditions of the building during a three-week test period in the heating season. The simulations were carried out using a dynamic simulation tool, IDA-ICE, which combines whole-building energy simulation and infiltration modelling.