This standard includes requirements and fire test methods for watermist nozzles for residential use. Test methods for other components than nozzles are not treated, but are described by other standards. INSTA 900-1 will be the basis for the design, installation and maintenance.
This standard is based on existing and present status of test standards for residential sprinkler and watermist nozzles for residential use.
Areas within buildings that contain hazard other than those which typically would be found in a residential occupancy are not covered by this standard.
Typical residential areas are:
- private homes (one and two family dwellings, row houses, vacation homes etc.);
- apartments, flats;
- manufactured homes.
Dwelling units and the escape routes from those areas for building types such as:
- care institutions (nursing homes, hospitals etc.);
- in hotels, motels etc.;
- student housing, dormitories;
- asylum centres.
The standard is not intended to restrict new technologies or alternative arrangements, provided that an equivalent level of safety is assured by a third party.
This standard is intended for use by those concerned with purchasing, designing, installing, testing, inspecting, approving, operating and maintaining residential watermist systems, in order that such equipment will function as intended throughout its lifetime.
This standard is intended only for fixed residential watermist systems in buildings on land, and it is a basic assumption that this standard is for the use of companies employing personnel competent in the field of application with which it deals. Only trained and experienced personnel should undertake the design, installation and maintenance of residential watermist systems. Similarly, competent technicians should be used in the inspection and testing of the system.
This standard does not necessarily cover all legislative requirements. National requirements regarding residential occupancies are mandatory.