Ottawa winter comfort — no hype The Question Almost Every Ottawa Homeowner Asks If you’ve lived through even one Ottawa winter, you’ve probably wondered: “Can a heat pump actually keep my home warm at -20°C or colder?” It’s a fair concern. Ottawa isn’t Vancouver. We experience extended sub-zero temperatures, sudden cold snaps, freeze–thaw cycles, heavy snow accumulation, and wind events. So let’s answer this properly — without hype. Yes, modern cold-climate heat pumps can work very well in Ottawa winters.