By Ray Mikkola ( September 14, 2018, 9:03 AM EDT) -- Residential landlords in Ontario are required to ensure that all habitable areas of a residence are maintained at a temperature of at least 20 degrees Celsius, pursuant to section 15 (1) of O Reg 517/06 made under the Residential Tenancies Act, 2006 SO 2006 c. 17 (the RTA). The law is much less clear regarding the obligation of a residential landlord when it comes to the provision of cooling of residences....