Concept and design
Prefab Passive House & LEED ready kit homes - the future of buying a new home?
...heat sources:
An air-heated radiant floor system from Legalett with an estimated 60-70% of the total heat load being provided by solar air heating panels, which also act to pre-heat domestic hot water in the summer.
A heat pump that operates down to -25 °C that can triple the heat generated per kWh of electricity cons...