Demand controlled ventilation.

The IEA Annex 18 Demand Controlled Ventilation Systems (DCV-Systems) with 9 participants is midway through its work program. Reviews are indicating possible energy savings in the range of 8%-40% both in experiments and in theoretical studies. Most of the case studies will start this autumn with sensor tests, test room studies, and trials in occupied spaces. The conditions in dwellings and offices with various ventilating systems will be simulated in the test rooms. Almost 30 occupied buildings will be involved in tests in dwellings, offices,auditoria and schools. The final report will take the form of a source book planned to be printed at the end of 1991.