A residential heating system ... heat into the air and distribute that hot air throughout the house. The system may operate by means of an electric furnace or a more standard furnace that burns ...

I thought that would only be possible if we had a furnace in the basement. I was too young to notice the array of hot water ...

France-based FHE Group has developed a residential thermochemical energy storage system that can be coupled with solar power generation to provide space heating and hot water to a household.