check out Ryan Hoyers web site at www.rubberboas.com they will do fine in your house anywhere between 65 and 75 they can also tollerate temps up to 80 but prefer lower. Gravid Females need a hot side of close to 80. I no of some people who cool them over winter to as low as 45 but I think around 50 to 55 is better. Richard or Ryan Hoyer would know better about the cooling temps.