00000nam 2200000za 4500 9.843023 CaOODSP 20221107152441 cr ||||||||||| 171102s1982 xxcd |o f|0| 0 eng d CaOODSP eng n-cn--- NH15-630/1982E-PDF Raab, Karl H. Upgrading residential forced air filtration [electronic resource] / Karl H. Raab. [S.l.] : Canada Mortgage and Housing Corporation, 1982. 34 p. : charts. "May 1982." Includes bibliographic references. "Detached dwelling units with forced air heating offer the possibility to significantly lower levels of suspended particulate matter. Several medium to high efficiency filtration systems are compared with respect to capital costs, annual operating costs and maintenance requirements"--Abstract. gccst Air quality gccst Housing Canada Mortgage and Housing Corporation. PDF 721 KB https://publications.gc.ca/collections/collection_2017/schl-cmhc/nh15/NH15-630-1982-eng.pdf