shutter

A table is given which compares the performance, construction and function of the various types of window treatment. Aspects covered include sun control, thermal insulation, infiltration barrier, security and privacy, control by static, movab

States that with double and triple glazed windows the air flow through the joints reduces the transmission heat flux. This has the effect of lowering the heat load and in particular the annual heat energy demand. The same phenomenon occurs when the windows are covered with shutters at night. Provides calculation equations.

Presents the results of tests on the air leakage characteristics of a number of different energy conservation products applied to a double hung window. Gives air leakage characteristics under simulated in-situ conditions atvarious wind speeds for the different products. Results show that interior shutters perform best, followed by interior storm windows, a reflective shade, quilts and standard window shades. Within a group, products involving perimeter sealing give the best air leakage characteristics.

One limiting factor in achieving optimum thermal performance in shutters is air leakage around the shutter edges. Describes a motor driven shutter using multilayer curtains employing a magnetic type edge seal. Measures the thermal performance of 2-layer and 4-layer shutters using a controlled environment chamber. The 2-layer shutter performs as well as a similarly sized unit in which the layers ar permanently sealed. The 4-layer unit does not perform as well as expected because of air leakage between cells at the top of theshutter.

Double-glazed windows are poor insulators, with regard to both thermal and acoustic properties. Reports on study of insulated shutters for windows, sponsored by the SCBR and the National Swedish Board for Technical Development. Estimates that the energy loss through such shutters combined with a double-glazed window is about 0.7 w/m2K (compared to 3 to 4 for the window alone) and noise transmission can be cut by 15 to 20 db. Calculates that each square metre of shutter area could save an average of about 300 KWh per year in Sweden.

Gives a detailed description of 3 types of external shutters that were designed for 3 of 6 proto-type low energy houses at Hjortekaer Denmark. Seals were made, and shown to be efficient by measurements of infiltration air change rates and results from pressurization tests. Verifies the thermal performance of the shutters by thermal calibration, and finds a good agreement between the measured and calculated heat losses. This forms a basis for an estimate of the annual energy savings obtained by the use of shutters - about 800-2000 Kwh/y.

Provides a summary of Report IIIa of the overall research project `air change in buildings' undertaken by the EMPA, Switzerland, sponsored by the Swiss Federal Ministry for Environmental Protection. Describes an investigation ontwo identical insulated flats in the same block with the same orientation, one with folding shutters and the other with roller blinds. The occupants were instructed on how to close the blinds at night. Their normal living habits and ventilation preferences were not affected. Illustrates the flats and blinds diagrammatically and in photographs.

Notes that in addition to multiple glazing and storm windows there is a wide range of insulating options available. These products include blinds, shutters, plastic films and shades. Briefly discusses the different products. Gives tables of systems showing manufacturers and performance data.

This is a practical handbook for constructing an energy efficient house. Describes energy conservation measures for the reduction of space heating in an average house on the Prairies. Describes conservation measures for a new house which include the improvement of air tightness, insulation, passive solar gainand insulation of window systems. Also describes refitting an older house, reducing energy used to heat water and reducing electricity consumption. Gives a short list of sources of information.