Passivhaus (or Passive House) is an advanced low-energy construction standard for buildings.
The principle utilises high-performance insulation to make a building completely draught-free, effectively eliminating heat loss to create a building with a very low environmental impact.
The five principles of passive house design are; No thermal bridging, superior windows, mechanical ventilation with heat recovery, quality insulation and airtight construction.
Similarly, Superinsulation is an approach to building design, construction, and retrofitting that dramatically reduces heat loss (and gain) by using much higher levels of insulation and airtightness than normal.