How are One-Watt-Houses heated?
One-Watt-Houses are heated and cooled passively most times of the year. The necessary added heat during climate extremes can supplied with a variety of low load solutions. A fundamental design goal of One-Watt-Houses is simplicity: The extra investment in insulation, windows and other passive house components is rewarded with savings in mechanical systems. Furnaces are not needed. Instead, we can use a on-demand water heater, heat pumps, solar thermal or other sources for both space heat and domestic hot water needs. CTI analyses available energy sources, heat load and the house system as a whole to determine the optimal HVAC solution for the building.
