ThermalPoint is a web application designed to help contractors size heat pumps for natural gas heated homes in Ontario. By simply entering data from utility billing, ThermalPoint assesses whether a heat pump is a suitable option for a home’s heating needs. Using historical gas consumption, ThermalPoint estimates the average heat loss of the home. Users can input heat pump capacity, and the tool will calculate the percentage of the annual heating load that the heat pump can cover before backup heating is needed, along with the outdoor temperatures at which this backup heating is required.