00000nam 2200000za 4500 9.844845 CaOODSP 20221107152831 cr ||||||||||| 180109s1990 oncad |o f000 0 eng d CaOODSP eng eng fre n-cn--- NH17-173/1990E-PDF CMHC Kitchener townhouse study of sub-slab venting technology. Phase II [electronic resource] / prepared for the Research Division, Canada Mortgage and Housing Corporation ; prepared by CH2M Hill Engineering Ltd. [Ottawa : Canada Mortgage and Housing Corporation], 1990. 2 v. "July 1990." Digitized edition from print [produced by Canada Mortgage and Housing Corporation]. Includes bibliographic references. v. 1. Report -- v. 2. Appendix A. Methane spotchecks in ambient and sub-slab floor spaces. "Sub-slab venting, a common technology used for the remediation of radon entry into homes, was applied to a group of methane plagued townhouses in Kitchener, Ontario. This soil ventilation essentially modifies the local pressure distribution around the basement structures such that air flow is from basements out toward the soil zone. Work performed in the previous year established the technical feasibility of this technology. This study was a second phase of work aimed at assessing the suitability of this technology across the entire townhouse site. The results of the monitoring program revealed that sub-slab ventilation was suitable as a mitigative measure at the townhouses. Significant improvements to the indoor air quality were observed. Vent gases were also tested to identify the presence of any hazardous organic compounds; no significant compounds were identified. An energy analysis was also performed to evaluate the impact of sub-slab venting on energy consumption within the homes"--Abstract, p. ii. Abstract in English and French. gccst Housing Canada Mortgage and Housing Corporation. Research Division. CH2M Hill Engineering Ltd. Canada Mortgage and Housing Corporation. Methane spotchecks in ambient and sub-slab floor spaces. Appendix A PDF 2.24 MB https://publications.gc.ca/collections/collection_2018/schl-cmhc/NH17-173-1990-eng.pdf [V. 1 - main report] PDF 1.00 MB https://publications.gc.ca/collections/collection_2018/schl-cmhc/NH17-173-1990-1-eng.pdf [V. 2 - appendix A]