你告诉房东,规定是如果暖气由房东付,不管任何季节,他必须保持室内气温在21度左右。不然你可以联系租房委员会告他的。
When the lease indicates that the heating of a dwelling is paid for by the landlord, the law requires that the landlord ensure the tenant has an adequate ambient temperature, regardless of the time of the year. When it is cold outside, the dwelling must be heated to about 21 degrees.
http://www.rdl.gouv.qc.ca/en/outils/Chauffage2011.asp