Young Black Haired Girl Strips Her Black Dress On The Roof With A Rainwater Tank

Internal rainwater tank
Rainwater tanks or drums may be used inside a house to provide thermal mass for a trombe wall (or water wall). Rainwater HOG modular tanks invented by Sally Dominguez to fit within building structure were used in the Modabode House of the Future floor and on the foyer wall of the Department of Sustainability building in Anglesea, Victoria, harnessing the high r value of the stored rainwater to add effective thermal mass to the enclosed spaces.
Specially designed rainwater tanks can also be embedded in or under the concrete slab of a building (stab tank).