00000nam 2200000za 4500 9.839410 CaOODSP 20221107151610 cr ||||||||||| 171206s1991 oncao||#of f000 0 eng d CaOODSP eng eng fre n-cn--- NH17-122/1991E-PDF Geddes, W. Douglas. Evaluation of the effectiveness of a hard connected duct into the return air system of a furnace forced air duct system as a means for providing ventilation and make-up air [electronic resource] : final report / by W. Douglas Geddes. Effectiveness of hand connected duct into a forced air duct system as a means of providing ventilation and make-up air [Ottawa : Canada Mortgage and Housing Corporation], 1991. 1 v. (various pagings) : photos, ill. "December 21, 1991." Digitized edition from print [produced by Canada Mortgage and Housing Corporation]. "The primary purpose of this project was to determine if furnace heat exchangers were prematurely or excessively rusting due to condensation when fresh air ducts are hard connected to the return air system. In addition, occupants were to be interviewed to ascertain whether such systems were causing cool drafts. The energy impact of this type of ventilation system and the practicality of installing high inside wall supply outlets was also to be investigated. A test house was to be set-up to measure air flows, temperatures and pressures during various modes of ventilation system operation"--Exec. Summary. Includes summary in French. gccst Heating gccst Air gccst Housing Canada Mortgage and Housing Corporation. PDF 3.60 MB https://publications.gc.ca/collections/collection_2017/schl-cmhc/nh17/NH17-122-1991-eng.pdf