Here's an interesting article regarding the future of mid-efficient furnaces in Canada. Download it - Here (http://hvactechgroup.com/files/MidPhaseOut.pdf)
Download the HRAI newsletter - Here (http://hvactechgroup.com/files/90Afue.pdf)
You can visit the Canada Natural Resources website - Here (http://oee.nrcan-rncan.gc.ca/residential/business/manufacturers/new-efficiency-standard.cfm?attr=8)