entrance door

Analysis of PM2.5 indoor-outdoor ratio in lobby floor according to configurations of entrance

Submitted by on Wed, 03/06/2024 - 15:03

Outdoor PM2.5 has a continuous and significant effect on the indoor environment, and lobby floors, in particular, can be exposed to high concentrations due to entrance doors and greater airflow rates than other floors. In this study, the PM2.5 indoor-to-outdoor (I/O) ratio for lobby floors was evaluated according to the operation type and configuration of entrance doors. Airflow analysis was conducted for an office building with multi-zone network simulation, and the I/O ratio was evaluated for different entrance strategies according to the occupant traffic schedule.

Research project on the noise isolation provided by access doors in multidwelling buildings.

Submitted by on Sat, 07/06/2013 - 16:30

MJM ACOUSTICAL CONSULTANTS INC. has been retained by the CANADA MORTGAGE & HOUSING CORPORATION to conduct a research project on the noise isolation provided by access doors in multi-dwe.lling buildings. A total of nine Sound Transmission Loss (TL) tests were conducted on four 1 3/4" doors (one wood door and three metal doors) and one 2 1/4" wood door. This research project has also been used as a preliminary attempt to validate a simple method to m. easure the Sound .T ransmission Loss and. Sound Transmission Class of a door when it is installed on site.