Combining a variable refrigerant flow heating and cooling system with heat recovery could save up to 32% of cooling energy and 90% of hot water usage in net-zero energy homes, compared to net-zero home designs without VRF heat recovery technology, a new study suggests.
Photo: 176th Wing Alaska Air National Guard / CC BY 2.0 / SOURCE
Converting tired old electric vehicle batteries into energy storage for homes with solar panels could reduce household carbon dioxide emissions by 21 percent, saving about 1 ton of...
