No purchase necessary to participate and you do not have to submit to a sales presentation. Void where prohibited by law, rule, or regulation. Renewal by Andersen of Greater Toronto reserves the right to suspend, modify, extend, or terminate this sweepstakes without notice at any time. Entrants must (a) be 21 years of age or older at time of entering promotion and (b) own a home located in the province of Ontario. Grand Prize winner must answer correctly within a 5 minute time period a mathematical skill-testing question without the benefit of any calculating devices before prize will be awarded. Further restrictions apply; see complete Official Rules.