The ProHOME is an all-electric and solar-ready house. Designing the mechanicals starts with the target R-values, then the design for the heating system. Minisplit heat pumps take care of heating and cooling. Because the ProHOME is airtight, it uses a ventilation system. We use a heat-pump water heater for its efficiency. Radiant heat in the bathrooms provides extra comfort. To learn more, visit FineHomebuilding.com/prohome.