소규모 다중이용시설의 동계 환기 실태조사 및 다중수식법을 활용한 공기교환율 추정

This study investigated ventilation conditions during winter in small-sized multi-use facilities and estimated air exchange rates using the Multiple-formulas method. To examine the ventilation conditions, on-site investigations were conducted at 27 facilities, including 12 restaurants, 12 cafes, and 3 karaoke booths. Air exchange rates were calculated using a mixed-average approach, Multiple-formulas method, combining formulas that estimate air exchange rates based on occupant-generated CO2 as a tracer gas. The estimated air exchange rates during winter were 3.47±3.76 h-1 overall, with 4.36±3.92 h-1 for restaurants, 1.76±2.30 h-1 for cafes, and 6.72±4.54 h-1 for karaoke booths. Among these facilities, 12 facilities (44.4%), fell below the ASHRAE Standard 62.1 ventilation requirements, indicating a need for further improvements to achieve adequate air exchange rates. The Multiple-formulas method produced air exchange rates estimates comparable to those reported in similar studies, confirming its reliability. This research contributes to estimating air exchange rates in small-sized multi-use facilities, where assessment is difficult and provides foundational data to support ventilation standards.