While there are established and feasible means to electrify space heating for many low heat load buildings like residential buildings, offices, and retail stores, all-electric solutions for high heat load buildings such as laboratories, research and development buildings, and hospitals continue to present challenges. Emerging products and strategies in the air-to-water heat pump, heat recovery and exhaust-source heat pump market are creating viable solutions to meet the majority of the annual sensible heating demand with efficient electrification. Combined with energy efficient building systems and envelopes, this can achieve >90% reduction in annual fossil fuel consumption for building heating.